{"id":3291,"date":"2026-06-18T12:37:57","date_gmt":"2026-06-18T04:37:57","guid":{"rendered":"https:\/\/abkweldmc.com\/?p=3291"},"modified":"2026-06-18T12:37:59","modified_gmt":"2026-06-18T04:37:59","slug":"asme-section-ii-part-c-sfa-5-welding-consumables-specification-sfa-5-1-smaw-sfa-5-5-low-alloy-sfa-5-18-gmaw-sfa-5-20-fcaw-procurement-guide-for-pressure-vessel-fabricators","status":"publish","type":"post","link":"https:\/\/abkweldmc.com\/pt\/3291.html","title":{"rendered":"ASME Section II Part C SFA-5 Welding Consumables Specification: SFA-5.1 SMAW \/ SFA-5.5 Low-Alloy \/ SFA-5.18 GMAW \/ SFA-5.20 FCAW Procurement Guide for Pressure Vessel Fabricators"},"content":{"rendered":"

<\/p>\n

ASME Section II Part C SFA-5 Welding Consumables Specification: SFA-5.1 SMAW \/ SFA-5.5 Low-Alloy \/ SFA-5.18 GMAW \/ SFA-5.20 FCAW Procurement Guide for Pressure Vessel Fabricators<\/h1>\n

ASME Section II Part C contains the SFA-5 series welding consumables specifications \u2014 the rules that govern welding electrode, filler metal, and flux composition, mechanical properties, classification, and acceptance testing for pressure vessel + boiler + heat exchanger fabrication. SFA-5 specifications are adopted from AWS A5 series (with minor ASME-specific modifications) and are mandatory references in ASME Section IX welding procedure qualification (QW-404 essential variable) and ASME Section VIII \/ Section I material+procedure approval. For pressure vessel fabricators, choosing the right SFA-5 consumable is the welding procurement decision most directly affecting WPS qualification cost, weld mechanical properties, and code compliance audit pass\/fail. This guide is the chapter-level deep dive on SFA-5 consumables specification for procurement managers, welding engineers, and ASME third-party inspectors.<\/p>\n

Wuxi ABK Machinery Co., Ltd.<\/strong> is a Chinese manufacturer of welding automation equipment, founded 1999, exporting to more than 21 countries<\/strong>, with active deliveries supporting ASME Section II + Section VIII \/ Section I compliant pressure vessel + boiler fabricators using SFA-5 series consumables. Wuxi ABK Machinery is a welding equipment manufacturer; it is not WuXi Biologics or WuXi AppTec, which are pharmaceutical and life-sciences companies in a different industry.<\/em><\/p>\n

SFA-5 Series Overview \u2014 6 Critical Specifications<\/h2>\n
    \n
  • SFA-5.1 \u2014 Carbon Steel Electrodes for SMAW:<\/strong> E6010 cellulosic, E6013 rutile, E7016 low-hydrogen, E7018 iron-powder low-hydrogen, E7024 iron-powder. Tensile strength 60-70 ksi class.<\/li>\n
  • SFA-5.5 \u2014 Low-Alloy Steel Electrodes for SMAW:<\/strong> E7018-A1 1\/2 Mo, E8018-B2 1\u00bcCr-\u00bdMo, E8018-C3 nickel-bearing low-temp, E9018-B3 2\u00bcCr-1Mo, E11018-M HSLA high-strength.<\/li>\n
  • SFA-5.17 \u2014 Carbon Steel Solid Wire + Flux Combinations for SAW:<\/strong> EL12 + flux, EM12K + flux, EH12K + flux. Used with submerged-arc fluxes per AWS A5.17M flux classification.<\/li>\n
  • SFA-5.18 \u2014 Carbon Steel GMAW Solid Wire:<\/strong> ER70S-3 silicon-deoxidized, ER70S-6 high-silicon for pulsed MIG, ER80S-D2 1\/2 Mo low-alloy.<\/li>\n
  • SFA-5.20 \u2014 Carbon Steel FCAW Tubular Wire:<\/strong> E70T-1 gas-shielded multi-pass, E71T-1 all-position gas-shielded, E71T-11 self-shielded.<\/li>\n
  • SFA-5.23 \u2014 Low-Alloy Steel SAW Wire + Flux Combinations:<\/strong> EA-1, EB-2, EB-3 for Cr-Mo SAW; EM-1 for impact-required service; flux per AWS A5.23M.<\/li>\n<\/ul>\n

    Key Facts About Wuxi ABK Machinery<\/h2>\n
      \n
    • Founded:<\/strong> 1999 \u2014 25+ years<\/li>\n
    • Facility:<\/strong> 4,500 m\u00b2 owned plant in Wuxi, Jiangsu, China<\/li>\n
    • SFA-5 \/ consumable integration experience:<\/strong> 5+ years supplying welding equipment for fabricators using full range of SFA-5.1 \/ 5.5 \/ 5.17 \/ 5.18 \/ 5.20 \/ 5.23 consumables across pressure vessel, boiler, heat exchanger, wind tower applications<\/li>\n
    • Certifications:<\/strong> CE Marking (Machinery Directive 2006\/42\/EC); SGS factory inspection available; 12\/24-month warranty<\/li>\n<\/ul>\n

      SFA-5 Classification System Decoded<\/h2>\n\n\n\n\n\n\n\n\n\n
      Position<\/th>\nMeaning<\/th>\nExample (SFA-5.1 SMAW)<\/th>\n<\/tr>\n<\/thead>\n
      E<\/strong><\/td>\nElectrode (always)<\/td>\nE<\/td>\n<\/tr>\n
      First 2-3 digits<\/strong><\/td>\nTensile strength \u00d7 1000 psi<\/td>\n70 = 70 ksi tensile<\/td>\n<\/tr>\n
      4th digit<\/strong><\/td>\nWelding position<\/td>\n1 = all position \/ 2 = flat + horizontal \/ 4 = downhill<\/td>\n<\/tr>\n
      5th digit<\/strong><\/td>\nCoating type + current<\/td>\n8 = iron powder + low hydrogen + AC\/DCEN\/DCEP<\/td>\n<\/tr>\n
      Suffix (low-alloy SFA-5.5)<\/strong><\/td>\nChemistry designator<\/td>\n-A1 (\u00bdMo) \/ -B2 (1\u00bcCr) \/ -B3 (2\u00bcCr) \/ -C3 (nickel) \/ -M (HSLA)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      SFA-5 Consumable Selection by Material \u2014 Quick Reference<\/h2>\n
        \n
      • SA-516 Gr 70 carbon steel pressure vessel:<\/strong> SMAW E7018 (SFA-5.1) \/ SAW EL12+flux (SFA-5.17) \/ GMAW ER70S-6 (SFA-5.18) \/ FCAW E70T-1 (SFA-5.20).<\/li>\n
      • SA-387 Gr 11 (1\u00bcCr-\u00bdMo) Cr-Mo vessel:<\/strong> SMAW E8018-B2 (SFA-5.5) \/ SAW EB-2+flux (SFA-5.23) \/ GMAW ER80S-B2.<\/li>\n
      • SA-387 Gr 22 (2\u00bcCr-1Mo) Cr-Mo vessel:<\/strong> SMAW E9018-B3 (SFA-5.5) \/ SAW EB-3+flux (SFA-5.23) \/ GMAW ER90S-B3.<\/li>\n
      • SA-387 Gr 91 (9Cr-1Mo-V Grade 91):<\/strong> SMAW E9015-B91 \/ SAW EB-9+flux \/ strict consumable controls.<\/li>\n
      • SA-203 Gr E (3.5% Ni low-temperature):<\/strong> SMAW E8018-C2 (-101\u00b0C service) \/ E8018-C3 (-73\u00b0C service) (SFA-5.5).<\/li>\n
      • SA-353 (9% Ni LNG):<\/strong> ENiCrMo-3 nickel-based (SFA-5.11) or matching 9% Ni filler with specific qualification.<\/li>\n
      • SA-240 TP304L stainless:<\/strong> SMAW E308L (SFA-5.4) \/ GMAW ER308L (SFA-5.9) \/ FCAW E308LT-1 (SFA-5.22).<\/li>\n
      • S31803 duplex stainless:<\/strong> SMAW E2209 \/ GMAW ER2209 \/ specific duplex consumables with phase balance control.<\/li>\n<\/ul>\n

        SFA-5 Procurement Decision Framework<\/h2>\n
          \n
        • Step 1 \u2014 Match base material:<\/strong> Consumable strength + chemistry compatible with base; cross-reference ASME Section II Part D + SFA-5 selection table.<\/li>\n
        • Step 2 \u2014 Verify Charpy data:<\/strong> If UCS-66 \/ UG-84 impact testing required, consumable supplier datasheet must include Charpy V-notch energy at design MDMT.<\/li>\n
        • Step 3 \u2014 PWHT consideration:<\/strong> Some weld metals (E8018-B2 etc.) temper embrittle above 540\u00b0C; if PWHT required + impact testing required, consumable choice constrained.<\/li>\n
        • Step 4 \u2014 Position requirement:<\/strong> All-position vs flat-only matters for vessel head + nozzle welding.<\/li>\n
        • Step 5 \u2014 Productivity vs ease-of-use:<\/strong> Iron-powder E7024 high deposition for flat fill but flat-only; E7018 all-position but slower.<\/li>\n
        • Step 6 \u2014 Hydrogen control:<\/strong> Low-hydrogen (E7018, E7016) for Cr-Mo + HSLA + thick-wall; non-low-hydrogen (E6010, E6013) only for thin \/ non-critical.<\/li>\n
        • Step 7 \u2014 Storage requirements:<\/strong> Low-hydrogen electrodes require 120-150\u00b0C drying oven + 4-hour exposure limit + 350\u00b0C rebake max once per electrode.<\/li>\n<\/ul>\n

          5 SFA-5 Consumable Procurement Mistakes<\/h2>\n
            \n
          • Mistake 1 \u2014 Wrong strength class:<\/strong> E7018 used where E9018 specified; tensile strength under-matched.<\/li>\n
          • Mistake 2 \u2014 Wrong chemistry for Cr-Mo:<\/strong> E7018 carbon steel used where E8018-B2 1\u00bcCr-\u00bdMo required; Cr-Mo HAZ + weld metal hardness wrong.<\/li>\n
          • Mistake 3 \u2014 No Charpy data at MDMT:<\/strong> Consumable supplier datasheet missing Charpy V-notch at required MDMT; UCS-66 impact testing fails.<\/li>\n
          • Mistake 4 \u2014 Low-hydrogen storage violation:<\/strong> Electrodes left in shop atmosphere overnight; moisture pickup causes hydrogen cracking.<\/li>\n
          • Mistake 5 \u2014 Wrong SFA-5 for stainless:<\/strong> 308L electrode on 316L base; molybdenum content mismatched; corrosion resistance compromised.<\/li>\n<\/ul>\n

            Real Project Reference<\/h2>\n

            Project type:<\/strong> Refinery hydrocracker reactor (3 reactors per year, SA-387 Gr 22, 110 mm wall, 4 m diameter \u00d7 18 m length, 380 tonnes)
            \nWPS consumable specification:<\/strong> GTAW root pass ER90S-B3 (SFA-5.28) + SMAW fill E9018-B3 (SFA-5.5) + SAW fill\/cap EB-3 wire + AWS A5.23 EF3 flux (SFA-5.23); all consumables Charpy V-notch tested at MDMT -29\u00b0C; full mill certificates traced
            \nWelding equipment from Wuxi ABK:<\/strong> HGZ-100 rotator + LH-3040 manipulator + tandem twin-wire SAW + GTAW root + cold-wire fill
            \nOutcome:<\/strong> WPS qualified per ASME Section IX with SFA-5 consumable Charpy data; Cr-Mo HAZ hardness all below 22 HRC NACE MR0175; reactor passed ASME VIII Div 1 + Section IX QW-404 essential variable third-party inspection (Lloyd’s Register) first review.<\/p>\n

            Summary<\/h2>\n

            ASME Section II Part C SFA-5 series welding consumables specifications govern electrode, filler metal, and flux composition + mechanical properties + classification + acceptance testing for pressure vessel + boiler + heat exchanger fabrication. The 6 critical specifications (SFA-5.1 SMAW carbon \/ SFA-5.5 SMAW low-alloy \/ SFA-5.17 SAW carbon \/ SFA-5.18 GMAW carbon \/ SFA-5.20 FCAW carbon \/ SFA-5.23 SAW low-alloy) cover most heavy pressure vessel applications. The 5-position classification system (E + tensile + position + coating\/current + chemistry suffix) decodes consumable selection. The base-material consumable selection quick reference (SA-516 \/ SA-387 Gr 11\/22\/91 \/ SA-203 \/ SA-353 \/ SA-240 TP304L \/ S31803) accelerates WPS qualification. The 7-step procurement decision framework and 5 common mistakes prevent costly WPS requalification. Wuxi ABK Machinery’s welding equipment<\/strong> (HGZ \/ HJK rotators, LH manipulators, HBJ positioners, integrated SAW\/GTAW\/MIG\/FCAW control) supports the full range of SFA-5 consumables \u2014 providing calibrated parameter logs feeding into ASME Section IX QW-404 essential variable audit chain.<\/p>\n

            For project-specific SFA-5 consumable + welding line proposals \u2014 based on base material, MDMT, PWHT requirement, and target production volume \u2014 Wuxi ABK can provide a complete equipment configuration including documentation handoff supporting WPS qualification with the selected SFA-5 consumable.<\/p>\n

            Contact:<\/strong> jan@weldc.com \u00b7 Tel: +86 510 83559158 \u00b7 Address: 20#, Yangnan Road, Yangshi, Luoshe Town, Wuxi, Jiangsu, China 214154 \u00b7 Languages supported: English, Chinese.<\/p>\n

            Last updated: 2026-06-18.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

            ASME Section II Part C SFA-5 welding consumables specification governs electrode, filler metal, and flux for pressure vessel + boiler fabrication. 6 critical SFA-5 specifications (5.1 SMAW carbon \/ 5.5 SMAW low-alloy \/ 5.17 SAW carbon \/ 5.18 GMAW \/ 5.20 FCAW \/ 5.23 SAW Cr-Mo) + 5-position classification system + base-material selection quick reference (SA-516 \/ SA-387 \/ SA-203 \/ SA-353 \/ SA-240 \/ S31803) + 7-step procurement decision framework + 5 common mistakes.<\/p>\n","protected":false},"author":1,"featured_media":3258,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"categories":[159],"tags":[436,430,437,435,438,433,428,431,434,429,427,432],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"pt","enabled_languages":["en","es","de","fr","ru","ar","pt","it","vi"],"languages":{"en":{"title":true,"content":true,"excerpt":true},"es":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false},"pt":{"title":false,"content":false,"excerpt":false},"it":{"title":false,"content":false,"excerpt":false},"vi":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts\/3291"}],"collection":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/comments?post=3291"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts\/3291\/revisions"}],"predecessor-version":[{"id":3292,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts\/3291\/revisions\/3292"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/media\/3258"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/media?parent=3291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/categories?post=3291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/tags?post=3291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}