5kg flux cored welding wire_5kg flux cored welding wire
6011 welding rods for sale
6011 welding rods represent a staple in the toolkit of both DIY enthusiasts and seasoned welding pro...
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" title=''>" title='Top Ranking
" title='In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
'>3In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
4Firstly, the expertise of Chinese manufacturers in producing welding electrodes spans decades, with a history rooted in continuous innovation and adaptation to cutting-edge welding technologies. A detailed evaluation of their product lines reveals a commitment to quality and performance. For instance, electrodes from leading brands undergo rigorous testing protocols that meet, and often exceed, international standards such as AWS, ISO, and EN. This ensures consistent product reliability, which is a critical factor for users choosing electrodes for demanding industrial applications.
5Moreover, trustworthiness is enhanced by the manufacturer’s global footprint. Having a presence in multiple countries means exposure to diverse market regulations and customer needs, highlighting their adaptability and commitment to global standards. This international reach also facilitates more efficient logistics and customer service support, crucial in ensuring uninterrupted supply chains for businesses relying on timely delivery of welding materials.
6
" title='A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
'>7A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
8 Netizens pay attention
welding electrodes supplier
">welding electrodes supplier
" title='
Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
welding electrodes supplier
'>Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
welding electrodes supplier
2025-08-17 00:13Read1472Visitors
">" title='A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
'>A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
2025-08-16 23:02Read1065Visitors
Looked and looked
- " title=''>
When evaluating potential suppliers, consider seeking out customer testimonials or case studies that reflect real-world experiences. Feedback from other businesses that have successfully partnered with a supplier can shed light on what new customers can expect. This insight can prove crucial in gauging reliability, customer service, and the quality of the products offered.
Trustworthiness is paramount when selecting a welding electrode manufacturer
. Trust is built through consistent delivery of quality products and reliable customer service. Reputable manufacturers offer robust support services, including technical assistance, training programs, and comprehensive warranties. Customer testimonials and reviews often highlight the dependability and longevity of their products in real-world applications, providing reassurance to prospective buyers. Moreover, these manufacturers maintain transparent business practices, ensuring that customers fully understand the capabilities and limitations of their products.
- welding electrodes manufacturer
" title='Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturer
'>Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturer
Latest tags
Links：
e71t11 035 10flux core galvanized steelstainless welding rod types6013 welding rod 1 8mig welding solid wirewelding rod j422welding rod per kilo pricess 309 welding electrode pricems to ss electrodewhat welding rod do you use for stainless steel7018 electrodedifference between stick welding and mig weldingstainless steel electrode manufacturers3/32 welding rod 70186013 welding rod 3 32 amps7018 h4rgasless aluminium mig welding wire023 flux wirestainless arc rodse308 16 electrodese71t-gs specser316 316ltypes of electrodes and their usessteel flux core wirewelding electrode for carbon steel pipeflux core mig6011 rod usesss welding rod 3.15 pricewelding electrodes pdfe6013 1 163/32 7018 welding rods7018 3 32what rod to weld stainless steelstainless welding rod numbere6013 3 321 8 6010 welding rod amperagesolid wire welding gas3 32 tig welding rodgas shieldedaws e6010 electrodemig welding auto body panels with flux core wireflux core welding 1 4 steel70s6 welding wire0.8 flux cored mig wire3 32 7018welding rod for a36 steele71t8 welding wireer309l wiregas shielded mig weldershielded flux core weldinga5 18 er70s 6mma vs arc weldingni rod welding cast ironcarbon steel welding electrode1 8 stainless steel welding rodss to carbon steel welding rodstainless steel to carbon steel welding rodflux welding wire 035welding electrode for cast iron to mild steel0.9 flux cored wire3/32 vs 1/8 welding rodcs welding rod308 flux core wirecast iron machinable welding rode71t wirewelding electrodes explainedss welding rod sizewelding wire fluxself shielded wireflux coated tig rodstainless electrode1 16 welding rod 60137018 stick welding ampswelding electrode 6013 2.5 mme71t flux core wiree6013 welding electrode6013 welding rod 5 326011 ac welding rodbig welding rodelectrode specification charte71t 1 1m
...
" title=''> ...
" title=''>" title='Top Ranking
" title='In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
'>3In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
4Firstly, the expertise of Chinese manufacturers in producing welding electrodes spans decades, with a history rooted in continuous innovation and adaptation to cutting-edge welding technologies. A detailed evaluation of their product lines reveals a commitment to quality and performance. For instance, electrodes from leading brands undergo rigorous testing protocols that meet, and often exceed, international standards such as AWS, ISO, and EN. This ensures consistent product reliability, which is a critical factor for users choosing electrodes for demanding industrial applications.
5Moreover, trustworthiness is enhanced by the manufacturer’s global footprint. Having a presence in multiple countries means exposure to diverse market regulations and customer needs, highlighting their adaptability and commitment to global standards. This international reach also facilitates more efficient logistics and customer service support, crucial in ensuring uninterrupted supply chains for businesses relying on timely delivery of welding materials.
6
" title='A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
'>7A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
8 Netizens pay attention
welding electrodes supplier
">welding electrodes supplier
" title='
Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
welding electrodes supplier
'>Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
welding electrodes supplier
2025-08-17 00:13Read1472Visitors
">" title='A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
'>A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
2025-08-16 23:02Read1065Visitors
Looked and looked
- " title=''>
When evaluating potential suppliers, consider seeking out customer testimonials or case studies that reflect real-world experiences. Feedback from other businesses that have successfully partnered with a supplier can shed light on what new customers can expect. This insight can prove crucial in gauging reliability, customer service, and the quality of the products offered.
Trustworthiness is paramount when selecting a welding electrode manufacturer
. Trust is built through consistent delivery of quality products and reliable customer service. Reputable manufacturers offer robust support services, including technical assistance, training programs, and comprehensive warranties. Customer testimonials and reviews often highlight the dependability and longevity of their products in real-world applications, providing reassurance to prospective buyers. Moreover, these manufacturers maintain transparent business practices, ensuring that customers fully understand the capabilities and limitations of their products.
- welding electrodes manufacturer
" title='Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturer
'>Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturer
Latest tags
Links：
e71t11 035 10flux core galvanized steelstainless welding rod types6013 welding rod 1 8mig welding solid wirewelding rod j422welding rod per kilo pricess 309 welding electrode pricems to ss electrodewhat welding rod do you use for stainless steel7018 electrodedifference between stick welding and mig weldingstainless steel electrode manufacturers3/32 welding rod 70186013 welding rod 3 32 amps7018 h4rgasless aluminium mig welding wire023 flux wirestainless arc rodse308 16 electrodese71t-gs specser316 316ltypes of electrodes and their usessteel flux core wirewelding electrode for carbon steel pipeflux core mig6011 rod usesss welding rod 3.15 pricewelding electrodes pdfe6013 1 163/32 7018 welding rods7018 3 32what rod to weld stainless steelstainless welding rod numbere6013 3 321 8 6010 welding rod amperagesolid wire welding gas3 32 tig welding rodgas shieldedaws e6010 electrodemig welding auto body panels with flux core wireflux core welding 1 4 steel70s6 welding wire0.8 flux cored mig wire3 32 7018welding rod for a36 steele71t8 welding wireer309l wiregas shielded mig weldershielded flux core weldinga5 18 er70s 6mma vs arc weldingni rod welding cast ironcarbon steel welding electrode1 8 stainless steel welding rodss to carbon steel welding rodstainless steel to carbon steel welding rodflux welding wire 035welding electrode for cast iron to mild steel0.9 flux cored wire3/32 vs 1/8 welding rodcs welding rod308 flux core wirecast iron machinable welding rode71t wirewelding electrodes explainedss welding rod sizewelding wire fluxself shielded wireflux coated tig rodstainless electrode1 16 welding rod 60137018 stick welding ampswelding electrode 6013 2.5 mme71t flux core wiree6013 welding electrode6013 welding rod 5 326011 ac welding rodbig welding rodelectrode specification charte71t 1 1m
...
" title='Top Ranking
" title='In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
'>3In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
4Firstly, the expertise of Chinese manufacturers in producing welding electrodes spans decades, with a history rooted in continuous innovation and adaptation to cutting-edge welding technologies. A detailed evaluation of their product lines reveals a commitment to quality and performance. For instance, electrodes from leading brands undergo rigorous testing protocols that meet, and often exceed, international standards such as AWS, ISO, and EN. This ensures consistent product reliability, which is a critical factor for users choosing electrodes for demanding industrial applications.
5Moreover, trustworthiness is enhanced by the manufacturer’s global footprint. Having a presence in multiple countries means exposure to diverse market regulations and customer needs, highlighting their adaptability and commitment to global standards. This international reach also facilitates more efficient logistics and customer service support, crucial in ensuring uninterrupted supply chains for businesses relying on timely delivery of welding materials.
6
Top Ranking
In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
In the burgeoning industrial landscape of China, welding electrodes have emerged as a vital component fueling the nation’s infrastructure and manufacturing sectors. As an SEO specialist with a deep understanding of market trends and search engine algorithms, I bring to you an authoritative insight into China’s welding electrode market, emphasizing product expertise, user experience, and reliability.
Firstly, the expertise of Chinese manufacturers in producing welding electrodes spans decades, with a history rooted in continuous innovation and adaptation to cutting-edge welding technologies. A detailed evaluation of their product lines reveals a commitment to quality and performance. For instance, electrodes from leading brands undergo rigorous testing protocols that meet, and often exceed, international standards such as AWS, ISO, and EN. This ensures consistent product reliability, which is a critical factor for users choosing electrodes for demanding industrial applications.
Moreover, trustworthiness is enhanced by the manufacturer’s global footprint. Having a presence in multiple countries means exposure to diverse market regulations and customer needs, highlighting their adaptability and commitment to global standards. This international reach also facilitates more efficient logistics and customer service support, crucial in ensuring uninterrupted supply chains for businesses relying on timely delivery of welding materials.
A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
Netizens pay attention
">
welding electrodes supplier
" title='
Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
'>
Expertise in welding electrodes extends beyond just the product specifications. A supplier with true expertise will offer detailed guidance on the selection process, advising on the best electrodes for specific environments and applications. They are adept at anticipating and resolving potential challenges that could arise during the welding process. This might include recommendations for adjustments in welding techniques or equipment maintenance to optimize electrode performance. Their expert advice can help prevent costly errors, saving both time and resources.
2025-08-17 00:13Read1472Visitors
" title='A unique aspect of China's welding electrode industry is its abundant and diverse supply chain
. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
A unique aspect of China's welding electrode industry is its abundant and diverse supply chain. With numerous manufacturers offering a wide array of electrode types, businesses can find products tailored to specific needs, whether that be for carbon steel, stainless steel, or specialized nickel-based alloys. Yet, with this variety comes the responsibility for buyers to ensure that products meet both national and international standards. Engaging in comprehensive supplier verification is thus paramount to validate the quality and integrity of welding electrodes sourced from China.
2025-08-16 23:02Read1065Visitors
Looked and looked
- " title=''>
When evaluating potential suppliers, consider seeking out customer testimonials or case studies that reflect real-world experiences. Feedback from other businesses that have successfully partnered with a supplier can shed light on what new customers can expect. This insight can prove crucial in gauging reliability, customer service, and the quality of the products offered.
Trustworthiness is paramount when selecting a welding electrode manufacturer
. Trust is built through consistent delivery of quality products and reliable customer service. Reputable manufacturers offer robust support services, including technical assistance, training programs, and comprehensive warranties. Customer testimonials and reviews often highlight the dependability and longevity of their products in real-world applications, providing reassurance to prospective buyers. Moreover, these manufacturers maintain transparent business practices, ensuring that customers fully understand the capabilities and limitations of their products.- welding electrodes manufacturer
" title='Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturer
'>Expertise is another critical factor that defines a competent welding electrodes manufacturer. It encompasses technical know-how and innovative capabilities in developing electrodes that cater to diverse welding needs, from manual arc welding to automated processes. Manufacturers with specialized expertise often engage in continuous research and development, which results in cutting-edge products that offer improved arc stability, minimal spatter, and better deposition rates. Additionally, expertise means understanding the metallurgy behind electrode coatings, allowing these manufacturers to produce electrodes that are precisely tailored to specific metals and alloys.
welding electrodes manufacturerLatest tags
Links：
- e71t11 035 10flux core galvanized steelstainless welding rod types6013 welding rod 1 8mig welding solid wirewelding rod j422welding rod per kilo pricess 309 welding electrode pricems to ss electrodewhat welding rod do you use for stainless steel7018 electrodedifference between stick welding and mig weldingstainless steel electrode manufacturers3/32 welding rod 70186013 welding rod 3 32 amps7018 h4rgasless aluminium mig welding wire023 flux wirestainless arc rodse308 16 electrodese71t-gs specser316 316ltypes of electrodes and their usessteel flux core wirewelding electrode for carbon steel pipeflux core mig6011 rod usesss welding rod 3.15 pricewelding electrodes pdfe6013 1 163/32 7018 welding rods7018 3 32what rod to weld stainless steelstainless welding rod numbere6013 3 321 8 6010 welding rod amperagesolid wire welding gas3 32 tig welding rodgas shieldedaws e6010 electrodemig welding auto body panels with flux core wireflux core welding 1 4 steel70s6 welding wire0.8 flux cored mig wire3 32 7018welding rod for a36 steele71t8 welding wireer309l wiregas shielded mig weldershielded flux core weldinga5 18 er70s 6mma vs arc weldingni rod welding cast ironcarbon steel welding electrode1 8 stainless steel welding rodss to carbon steel welding rodstainless steel to carbon steel welding rodflux welding wire 035welding electrode for cast iron to mild steel0.9 flux cored wire3/32 vs 1/8 welding rodcs welding rod308 flux core wirecast iron machinable welding rode71t wirewelding electrodes explainedss welding rod sizewelding wire fluxself shielded wireflux coated tig rodstainless electrode1 16 welding rod 60137018 stick welding ampswelding electrode 6013 2.5 mme71t flux core wiree6013 welding electrode6013 welding rod 5 326011 ac welding rodbig welding rodelectrode specification charte71t 1 1m