flux core wire spool sizes_7014 welding rod 3/32
...
...
...
'>China's Authoritativeness in the welding industry is further solidified by its adherence to international standards like AWS (American Welding Society) and ISO (International Organization for Standardization). By obtaining essential certifications, Chinese manufacturers guarantee that their electrodes meet or exceed global benchmarks, which reinforces customer confidence and facilitates easy entry into foreign markets. Additionally, hosting international welding expos and participating in global conferences has allowed Chinese producers to showcase their technical prowess and engage in valuable knowledge exchange.
...
" title=''> ...
" title='In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
'>" title='In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
'>In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
...
...
" title=''>" title='Top Ranking
- 13 32 e7018
- 2
Trustworthiness is built over time through consistent product quality, reliable delivery schedules, and transparent communication. A trustworthy supplier not only delivers what is promised but also provides comprehensive support post-purchase. This includes technical support to address any welding challenges and a robust return policy if the electrodes do not meet the required specifications. Customer reviews and testimonials are candid reflections of a supplier’s reliability and are crucial in assessing their trustworthiness.
- " title=''>3
'>4Real Experience Counts Real-world experience goes beyond mere knowledge. It's about understanding the challenges welders face on-site and in controlled environments. Suppliers with extensive experience in different sectors—such as automotive, construction, and industrial fabrication—provide insights that are practical and immensely valuable. Experience is not merely the number of years a company has been in business but includes their engagement with projects of varying complexities and scales.
- 57018 welding rod 1_8 vs 3_32
- 6
Over the past two decades, China has emerged as a leader in the production of welding electrodes, blending innovation and traditional manufacturing techniques. The key to understanding their efficacy lies in recognizing the types of electrodes produced, such as consumable and non-consumable variants, each offering unique advantages and applications. Chinese manufacturers prioritize quality, offering both rutile and basic electrodes that guarantee exceptional mechanical properties and weld integrity.
- " title='
From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
'>7From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
- " title=''>8
Netizens pay attention
- ">
" title=''>2025-08-17 21:52Read1480Visitors
- ">
" title='- ">
" title=''>2025-08-17 20:24Read355Visitors
Looked and looked
- " title='
Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
'>Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
- " title='
Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
'>Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
- " title='
Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
'>Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
- " title=''>
- 6011 or 7018
Expanding on the experiential advantage, individuals who have utilized these electrodes frequently report superior performance in varied environmental conditions. Whether working in humid tropical climates or the dry, cold expanses of northern latitudes, Chinese welding electrodes maintain their integrity, exhibiting excellent performance due to their refined composition and design.
Trustworthiness forms the backbone of any business relationship, and when it comes to welding electrodes, end-users need to rely on products that promise consistency and durability. Chinese welding electrodes have garnered trust across continents by continuously delivering on these fronts. Manufacturers often provide extensive documentation and support, ensuring customers fully understand the capabilities and limitations of each electrode type. Moreover, they offer comprehensive after-sales service, which includes technical support and guidance post-purchase.
- " title=''>
Expertise in this field does not come by chance. Chinese manufacturers have invested heavily in research and development, often collaborating with universities and research institutions to stay at the forefront of welding technology. This commitment to innovation is evident in their development of electrodes that offer improved arc stability, enhanced weld bead appearance, and superior mechanical properties. As a result, Chinese electrodes are now synonymous with robust performance even under challenging conditions.
welding electrodes in china
Latest tags
Links：
e71t-gs meaninge71t-gs polaritygasless aluminum mig wire035 gasless flux core wirewelding stainless steel mig flux corearc welding rods for cast iron6011 welding rod 1 8welding steel rodscast iron to mild steel welding roder316e309 166013 ac welding rodflux core 0.8 mmwhat is 7013 welding rod used foraws e6013 specificationarc vs mig welding strengthwelding electrode raw material pdfhigh carbon welding rods2.5 mm stainless rodwhat is the difference between e71t-gs and e71t-11aws 7018 welding rodwhy is argon used in arc welding6011 or 7018 welding rodstainless steel flux core welding wireaws er70s 6 specificationer 309l filler wirewhat welding rod do you use to weld cast ironstainless welding rod sizesdifferent types of welding rodscast iron stick welding rodflux core wire vs solid wiress filler rodnr 232 flux coremig tig arc welding differencewhat tig electrode for stainlessaluminium flux core wire50 lb 7018 1 80.35 flux core wirestainless steel welding rod chartcarbon steel electrode classificationgasless flux cored carbon steelstick vs flux coreenicl 99 nickel cast iron welding electrodeer 309 lwelding rod types and uses71t gs welding wiremig solid wiree71t11 030 10welding stick stainless steelcan you weld with solid wire without gas7018 welding rod 5 32 ampse71t-gs vs e71t-11good 7018 welds35 flux core welding wire7018 welding rod coststainless steel tig welding rodsrod welding stainless steel3 32 rodss 304 welding electrodecs welding electrodetig flux7018 ac rodswhat is the difference between arc and argon weldinge309 16 welding rodwhat rod to weld stainless steel316 filler rod for 304 stainlessflux core 85e71t gs meaning6013 rodsflux core vs gas migflux core settings308l flux core wiree7018ac welding rod6013 welding electrodee309 welding roder70s-6 aws classificationaws e309mig vs stick strengther309arc or mig what is bettertig welding mild steel with stainless rodcast iron machinable welding rodcarbon steel pipe welding
...
In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
" title='In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
'>In the competitive landscape of welding, the choice of welding electrodes plays a pivotal role in the overall success and quality of the welding process. As a coalescence of experience, expertise, authoritativeness, and trustworthiness, choosing a reliable welding electrodes manufacturer can significantly enhance your productivity and project outcomes.
...
...
" title='Top Ranking
- 13 32 e7018
- 2
Trustworthiness is built over time through consistent product quality, reliable delivery schedules, and transparent communication. A trustworthy supplier not only delivers what is promised but also provides comprehensive support post-purchase. This includes technical support to address any welding challenges and a robust return policy if the electrodes do not meet the required specifications. Customer reviews and testimonials are candid reflections of a supplier’s reliability and are crucial in assessing their trustworthiness.
- " title=''>3
'>4Real Experience Counts Real-world experience goes beyond mere knowledge. It's about understanding the challenges welders face on-site and in controlled environments. Suppliers with extensive experience in different sectors—such as automotive, construction, and industrial fabrication—provide insights that are practical and immensely valuable. Experience is not merely the number of years a company has been in business but includes their engagement with projects of varying complexities and scales.
- 57018 welding rod 1_8 vs 3_32
- 6
Over the past two decades, China has emerged as a leader in the production of welding electrodes, blending innovation and traditional manufacturing techniques. The key to understanding their efficacy lies in recognizing the types of electrodes produced, such as consumable and non-consumable variants, each offering unique advantages and applications. Chinese manufacturers prioritize quality, offering both rutile and basic electrodes that guarantee exceptional mechanical properties and weld integrity.
- " title='
From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
'>7From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
- " title=''>8
Netizens pay attention
- ">
" title=''>2025-08-17 21:52Read1480Visitors
- ">
" title='- ">
" title=''>2025-08-17 20:24Read355Visitors
Looked and looked
- " title='
Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
'>Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
- " title='
Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
'>Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
- " title='
Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
'>Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
- " title=''>
- 6011 or 7018
Expanding on the experiential advantage, individuals who have utilized these electrodes frequently report superior performance in varied environmental conditions. Whether working in humid tropical climates or the dry, cold expanses of northern latitudes, Chinese welding electrodes maintain their integrity, exhibiting excellent performance due to their refined composition and design.
Trustworthiness forms the backbone of any business relationship, and when it comes to welding electrodes, end-users need to rely on products that promise consistency and durability. Chinese welding electrodes have garnered trust across continents by continuously delivering on these fronts. Manufacturers often provide extensive documentation and support, ensuring customers fully understand the capabilities and limitations of each electrode type. Moreover, they offer comprehensive after-sales service, which includes technical support and guidance post-purchase.
- " title=''>
Expertise in this field does not come by chance. Chinese manufacturers have invested heavily in research and development, often collaborating with universities and research institutions to stay at the forefront of welding technology. This commitment to innovation is evident in their development of electrodes that offer improved arc stability, enhanced weld bead appearance, and superior mechanical properties. As a result, Chinese electrodes are now synonymous with robust performance even under challenging conditions.
welding electrodes in china
Latest tags
Links：
e71t-gs meaninge71t-gs polaritygasless aluminum mig wire035 gasless flux core wirewelding stainless steel mig flux corearc welding rods for cast iron6011 welding rod 1 8welding steel rodscast iron to mild steel welding roder316e309 166013 ac welding rodflux core 0.8 mmwhat is 7013 welding rod used foraws e6013 specificationarc vs mig welding strengthwelding electrode raw material pdfhigh carbon welding rods2.5 mm stainless rodwhat is the difference between e71t-gs and e71t-11aws 7018 welding rodwhy is argon used in arc welding6011 or 7018 welding rodstainless steel flux core welding wireaws er70s 6 specificationer 309l filler wirewhat welding rod do you use to weld cast ironstainless welding rod sizesdifferent types of welding rodscast iron stick welding rodflux core wire vs solid wiress filler rodnr 232 flux coremig tig arc welding differencewhat tig electrode for stainlessaluminium flux core wire50 lb 7018 1 80.35 flux core wirestainless steel welding rod chartcarbon steel electrode classificationgasless flux cored carbon steelstick vs flux coreenicl 99 nickel cast iron welding electrodeer 309 lwelding rod types and uses71t gs welding wiremig solid wiree71t11 030 10welding stick stainless steelcan you weld with solid wire without gas7018 welding rod 5 32 ampse71t-gs vs e71t-11good 7018 welds35 flux core welding wire7018 welding rod coststainless steel tig welding rodsrod welding stainless steel3 32 rodss 304 welding electrodecs welding electrodetig flux7018 ac rodswhat is the difference between arc and argon weldinge309 16 welding rodwhat rod to weld stainless steel316 filler rod for 304 stainlessflux core 85e71t gs meaning6013 rodsflux core vs gas migflux core settings308l flux core wiree7018ac welding rod6013 welding electrodee309 welding roder70s-6 aws classificationaws e309mig vs stick strengther309arc or mig what is bettertig welding mild steel with stainless rodcast iron machinable welding rodcarbon steel pipe welding
Top Ranking
- 13 32 e7018
- 2
Trustworthiness is built over time through consistent product quality, reliable delivery schedules, and transparent communication. A trustworthy supplier not only delivers what is promised but also provides comprehensive support post-purchase. This includes technical support to address any welding challenges and a robust return policy if the electrodes do not meet the required specifications. Customer reviews and testimonials are candid reflections of a supplier’s reliability and are crucial in assessing their trustworthiness.
- " title=''>3
'>4Real Experience Counts Real-world experience goes beyond mere knowledge. It's about understanding the challenges welders face on-site and in controlled environments. Suppliers with extensive experience in different sectors—such as automotive, construction, and industrial fabrication—provide insights that are practical and immensely valuable. Experience is not merely the number of years a company has been in business but includes their engagement with projects of varying complexities and scales.
- 57018 welding rod 1_8 vs 3_32
- 6
Over the past two decades, China has emerged as a leader in the production of welding electrodes, blending innovation and traditional manufacturing techniques. The key to understanding their efficacy lies in recognizing the types of electrodes produced, such as consumable and non-consumable variants, each offering unique advantages and applications. Chinese manufacturers prioritize quality, offering both rutile and basic electrodes that guarantee exceptional mechanical properties and weld integrity.
- " title='
From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
'>7From an expertise perspective, Chinese welding electrode manufacturers have honed their techniques over decades, mastering a variety of electrode types such as Mild Steel Electrodes, Stainless Steel Electrodes, and Low Hydrogen Electrodes, to mention a few. These manufacturers not only cater to the local market but are also heavily involved in exports, supplying to regions including Europe, North America, and Southeast Asia. The extensive knowledge and experience accumulated by these manufacturers are reflected in their ability to customize products according to client specifications, thereby increasing their appeal to a diverse range of industries.
" title=''>8Netizens pay attention
- ">" title=''>
2025-08-17 21:52Read1480Visitors
">" title='">" title=''>2025-08-17 20:24Read355Visitors
Looked and looked
- " title='
Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
'>Professional expertise signifies a supplier’s proficiency in the technical details and applications of welding electrodes. A knowledgeable supplier not only stocks a diverse range of electrodes, such as E6010, E7018, or stainless options but can also provide guidance on the best electrode for your specific welding technique, be it SMAW, MIG, or TIG. Their advice can be invaluable in ensuring that the chosen electrodes match the project requirements and environmental conditions, such as humidity or temperature variations.
- " title='
Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
'>Manufacturers with extensive experience in the industry often possess a deep understanding of metallurgical complexities. Such companies leverage cutting-edge technology and research to develop electrodes that withstand rigorous testing for durability, tensile strength, and conductivity. Experience enables them to anticipate and adapt to shifts in market demands and regulatory standards, thereby maintaining product efficacy.
- " title='
Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
'>Selecting a welding electrodes manufacturer is a pivotal decision for businesses in the metallurgical and construction industries. The right choice not only affects the quality and durability of your welds but also impacts project timelines and costs. There are several factors to consider that align with Experience, Expertise, Authoritativeness, and Trustworthiness—elements crucial for choosing the ideal supplier.
- " title=''>
- 6011 or 7018
Expanding on the experiential advantage, individuals who have utilized these electrodes frequently report superior performance in varied environmental conditions. Whether working in humid tropical climates or the dry, cold expanses of northern latitudes, Chinese welding electrodes maintain their integrity, exhibiting excellent performance due to their refined composition and design.
Trustworthiness forms the backbone of any business relationship, and when it comes to welding electrodes, end-users need to rely on products that promise consistency and durability. Chinese welding electrodes have garnered trust across continents by continuously delivering on these fronts. Manufacturers often provide extensive documentation and support, ensuring customers fully understand the capabilities and limitations of each electrode type. Moreover, they offer comprehensive after-sales service, which includes technical support and guidance post-purchase.
" title=''>Expertise in this field does not come by chance. Chinese manufacturers have invested heavily in research and development, often collaborating with universities and research institutions to stay at the forefront of welding technology. This commitment to innovation is evident in their development of electrodes that offer improved arc stability, enhanced weld bead appearance, and superior mechanical properties. As a result, Chinese electrodes are now synonymous with robust performance even under challenging conditions.
welding electrodes in chinaLatest tags
Links：
- e71t-gs meaninge71t-gs polaritygasless aluminum mig wire035 gasless flux core wirewelding stainless steel mig flux corearc welding rods for cast iron6011 welding rod 1 8welding steel rodscast iron to mild steel welding roder316e309 166013 ac welding rodflux core 0.8 mmwhat is 7013 welding rod used foraws e6013 specificationarc vs mig welding strengthwelding electrode raw material pdfhigh carbon welding rods2.5 mm stainless rodwhat is the difference between e71t-gs and e71t-11aws 7018 welding rodwhy is argon used in arc welding6011 or 7018 welding rodstainless steel flux core welding wireaws er70s 6 specificationer 309l filler wirewhat welding rod do you use to weld cast ironstainless welding rod sizesdifferent types of welding rodscast iron stick welding rodflux core wire vs solid wiress filler rodnr 232 flux coremig tig arc welding differencewhat tig electrode for stainlessaluminium flux core wire50 lb 7018 1 80.35 flux core wirestainless steel welding rod chartcarbon steel electrode classificationgasless flux cored carbon steelstick vs flux coreenicl 99 nickel cast iron welding electrodeer 309 lwelding rod types and uses71t gs welding wiremig solid wiree71t11 030 10welding stick stainless steelcan you weld with solid wire without gas7018 welding rod 5 32 ampse71t-gs vs e71t-11good 7018 welds35 flux core welding wire7018 welding rod coststainless steel tig welding rodsrod welding stainless steel3 32 rodss 304 welding electrodecs welding electrodetig flux7018 ac rodswhat is the difference between arc and argon weldinge309 16 welding rodwhat rod to weld stainless steel316 filler rod for 304 stainlessflux core 85e71t gs meaning6013 rodsflux core vs gas migflux core settings308l flux core wiree7018ac welding rod6013 welding electrodee309 welding roder70s-6 aws classificationaws e309mig vs stick strengther309arc or mig what is bettertig welding mild steel with stainless rodcast iron machinable welding rodcarbon steel pipe welding