{"id":3372,"date":"2026-09-22T19:11:39","date_gmt":"2026-09-22T11:11:39","guid":{"rendered":"https:\/\/abkweldmc.com\/?p=3372"},"modified":"2026-09-22T19:11:41","modified_gmt":"2026-09-22T11:11:41","slug":"aws-d1-1-structural-steel-vs-d1-2-aluminum-vs-d1-5-bridge-vs-d1-6-stainless-vs-d1-9-titanium-structural-welding-codes-comparison-matrix-fabricator-selection-guide-for-buildings-bridges-ma","status":"publish","type":"post","link":"https:\/\/abkweldmc.com\/de\/3372.html","title":{"rendered":"AWS D1.1 (Structural Steel) vs D1.2 (Aluminum) vs D1.5 (Bridge) vs D1.6 (Stainless) vs D1.9 (Titanium) Structural Welding Codes Comparison Matrix: Fabricator Selection Guide for Buildings, Bridges, Marine, Aerospace, and Specialty Structural Fabrication<"},"content":{"rendered":"

AWS D1.1 (Structural Steel) vs D1.2 (Aluminum) vs D1.5 (Bridge) vs D1.6 (Stainless) vs D1.9 (Titanium) Structural Welding Codes Comparison Matrix: Fabricator Selection Guide for Buildings, Bridges, Marine, Aerospace, and Specialty Structural Fabrication<\/h1>\n

This AWS D1 family comparison matrix maps the five major AWS D1 structural welding codes \u2014 D1.1 Structural Steel + D1.2 Structural Aluminum (per Batch 34 #4 aluminum context) + D1.5 Bridge (AASHTO-adopted) + D1.6 Structural Stainless Steel (per Batch 34 #5) + D1.9 Structural Titanium \u2014 plus supplementary codes D1.3\/D1.4\/D1.7\/D1.8. Fabricator + engineer + specifier + procurement decision makers use this matrix to identify the applicable AWS D1 code for a given structural welding project + understand welder qualification + inspection + documentation requirements per code. AWS D1 series is US-primary but widely adopted internationally as reference.<\/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>. 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

AWS D1 Family Complete Overview<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Standard<\/th>\nFull Title<\/th>\nPrimary Application<\/th>\n<\/tr>\n<\/thead>\n
AWS D1.1<\/strong><\/td>\nStructural Welding Code \u2014 Steel<\/td>\nBuildings + general structural + tanks + industrial + non-critical bridges<\/td>\n<\/tr>\n
AWS D1.2<\/strong><\/td>\nStructural Welding Code \u2014 Aluminum<\/td>\nAluminum structural + marine + rail + transportation (per Batch 34 #4)<\/td>\n<\/tr>\n
AWS D1.3<\/strong><\/td>\nStructural Welding Code \u2014 Sheet Steel<\/td>\nCold-formed thin gauge structural applications<\/td>\n<\/tr>\n
AWS D1.4<\/strong><\/td>\nStructural Welding Code \u2014 Reinforcing Steel<\/td>\nRebar welding for reinforced concrete construction<\/td>\n<\/tr>\n
AWS D1.5<\/strong><\/td>\nBridge Welding Code (AASHTO\/AWS)<\/td>\nHighway bridge + AASHTO-jurisdiction bridge fabrication<\/td>\n<\/tr>\n
AWS D1.6<\/strong><\/td>\nStructural Welding Code \u2014 Stainless Steel<\/td>\nStainless architectural + marine + chemical structural (per Batch 34 #5)<\/td>\n<\/tr>\n
AWS D1.7<\/strong><\/td>\nGuide for Strengthening and Repairing Existing Structures<\/td>\nStructural retrofit + repair welding<\/td>\n<\/tr>\n
AWS D1.8<\/strong><\/td>\nSeismic Supplement<\/td>\nSeismic-critical connections + supplement to D1.1<\/td>\n<\/tr>\n
AWS D1.9<\/strong><\/td>\nStructural Welding Code \u2014 Titanium<\/td>\nTitanium structural (aerospace + specialty per Batch 39 #5)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

AWS D1.1 (Structural Steel) \u2014 Most Widely Applied<\/h2>\n
    \n
  • Scope:<\/strong> Steel structures + carbon steel + low-alloy steel + tubular steel; excludes pressure equipment (ASME) + bridges under D1.5 jurisdiction<\/li>\n
  • Welder qualification:<\/strong> Clause 4 with positions 1G\/2G\/3G\/4G groove + 1F\/2F\/3F\/4F fillet<\/li>\n
  • Prequalified WPS:<\/strong> Clause 3 provides prequalified joint details + parameters<\/li>\n
  • NDE:<\/strong> Visual + UT (Section 6) + RT for critical + MT\/PT for surface<\/li>\n
  • Common connections:<\/strong> CJP (Complete Joint Penetration) + PJP (Partial Joint Penetration) + fillet<\/li>\n<\/ul>\n

    AWS D1.5 (Bridge) vs D1.1 Distinction<\/h2>\n
      \n
    • D1.5 stricter than D1.1:<\/strong> Bridge-specific supplementary requirements \u2014 enhanced material toughness + Charpy impact + weld quality<\/li>\n
    • AASHTO adoption:<\/strong> American Association of State Highway and Transportation Officials adopts D1.5 for federal bridge program<\/li>\n
    • Fracture-critical members (FCM):<\/strong> Additional requirements for tension members whose failure would cause collapse<\/li>\n
    • Certified Welding Fabricator (CWF):<\/strong> AASHTO\/NSBA (National Steel Bridge Alliance) program for bridge fabricators<\/li>\n<\/ul>\n

      AWS D1.6 (Stainless) Distinctive Features (per Batch 34 #5)<\/h2>\n
        \n
      • Stainless families:<\/strong> Austenitic + ferritic + martensitic + duplex + PH precipitation-hardening<\/li>\n
      • Interpass temperature control:<\/strong> 150\u00b0C max for austenitic sigma phase prevention<\/li>\n
      • Argon back-purging:<\/strong> Root pass purging for oxidation prevention<\/li>\n
      • Post-weld cleaning\/passivation:<\/strong> Passive layer restoration<\/li>\n
      • Applications:<\/strong> Architectural landmark + bridge + marine + chemical + food\/pharma<\/li>\n<\/ul>\n

        AWS D1.2 (Aluminum) Distinctive Features (per Batch 34 #4)<\/h2>\n
          \n
        • Aluminum alloy series:<\/strong> 1xxx-7xxx per weldability<\/li>\n
        • Weldment strength reduction:<\/strong> 40-60% for 6xxx-T6 heat-treatable<\/li>\n
        • AC-TIG + AC-GMAW:<\/strong> Specialty for oxide layer control<\/li>\n
        • Applications:<\/strong> Marine + trailer + rail + aerospace structural<\/li>\n<\/ul>\n

          AWS D1.9 (Titanium) Distinctive Features (per Batch 39 #5)<\/h2>\n
            \n
          • Reactive metal:<\/strong> Extreme atmospheric contamination prevention<\/li>\n
          • Trailing shield + envelope chamber:<\/strong> Mandatory shielding<\/li>\n
          • Interstitial content limits:<\/strong> Oxygen + nitrogen + hydrogen strictly controlled<\/li>\n
          • Applications:<\/strong> Aerospace primary structure + specialty + medical<\/li>\n<\/ul>\n

            Selection Decision Framework<\/h2>\n
              \n
            • What material?<\/strong> Steel \u2192 D1.1; Aluminum \u2192 D1.2; Stainless \u2192 D1.6; Titanium \u2192 D1.9; Rebar \u2192 D1.4; Sheet \u2192 D1.3<\/li>\n
            • What application?<\/strong> Building \u2192 D1.1; Bridge \u2192 D1.5; Marine \u2192 D1.6 or D1.2; Aerospace \u2192 D1.9 or D1.2<\/li>\n
            • Seismic?<\/strong> Add D1.8 supplement to D1.1<\/li>\n
            • Repair\/strengthening?<\/strong> Add D1.7 guidance<\/li>\n
            • Combined codes common:<\/strong> D1.1 + D1.8 seismic building; D1.5 + FCM bridge; D1.6 + local code stainless architectural<\/li>\n<\/ul>\n

              Welder Qualification Common Approach<\/h2>\n
                \n
              • Position designators (D1.1\/D1.5 similar):<\/strong> 1G flat + 2G horizontal + 3G vertical + 4G overhead groove; 1F\/2F\/3F\/4F fillet<\/li>\n
              • Multi-code welder:<\/strong> Welders often qualified per multiple D1 codes for versatility<\/li>\n
              • ASME IX cross-recognition:<\/strong> Many AWS D1 welders also qualified ASME IX for pressure work<\/li>\n
              • API 1104 cross-recognition:<\/strong> Pipeline welders sometimes cross-qualified for structural<\/li>\n<\/ul>\n

                Wuxi ABK Equipment for AWS D1 Structural Fabrication<\/h2>\n
                  \n
                • D1.1 Steel structural:<\/strong> Cell A + HJK heavy rotator (for large structural) + LH manipulator + comprehensive parameter logging<\/li>\n
                • D1.5 Bridge:<\/strong> Similar equipment + enhanced quality documentation + FCM traceability<\/li>\n
                • D1.6 Stainless:<\/strong> Cell A + purging system + segregated fixtures<\/li>\n
                • D1.2 Aluminum:<\/strong> AC-GMAW\/TIG + Cell H modular per Batch 28 #1 for multi-process<\/li>\n
                • D1.9 Titanium:<\/strong> Envelope chamber + trailing shield + specialty per Batch 39 #5<\/li>\n
                • Wind tower structural (D1.1 + EN 1090):<\/strong> Cell B configuration (per Batch 42 #1) with dual-code documentation<\/li>\n<\/ul>\n

                  Summary<\/h2>\n

                  AWS D1 family structural welding codes comparison \u2014 D1.1 Steel (buildings + general structural + tanks + industrial + non-critical bridges) + D1.2 Aluminum (per Batch 34 #4 marine\/rail\/aerospace) + D1.3 Sheet Steel + D1.4 Reinforcing Rebar + D1.5 Bridge (AASHTO-adopted + FCM Fracture-Critical Members + CWF certification) + D1.6 Stainless (per Batch 34 #5 austenitic\/ferritic\/martensitic\/duplex\/PH) + D1.7 Strengthening + Repair + D1.8 Seismic Supplement + D1.9 Titanium (per Batch 39 #5 reactive metal + envelope chamber). D1.1 most widely applied + prequalified WPS Clause 3 + welder qualification Clause 4 + NDE Section 6. D1.5 stricter than D1.1 for bridges + FCM enhanced material toughness + Charpy impact. Selection decision framework (material + application + seismic + repair + combined codes common). Welder qualification (positions 1G\/2G\/3G\/4G groove + 1F\/2F\/3F\/4F fillet + ASME IX + API 1104 cross-recognition). Wuxi ABK Machinery equipment<\/strong> Cell A + HJK heavy + Cell B wind tower + Cell H modular + purging + envelope chamber supports D1.1 + D1.5 + D1.6 + D1.2 + D1.9 structural fabrication + EN 1090 dual-code documentation.<\/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: English, Chinese.<\/p>\n

                  Last updated: 2026-07-30.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

                  A comparison of AWS D1.1 steel, D1.2 aluminum, D1.5 bridge, D1.6 stainless and D1.9 titanium codes, with selection rules, welder qualification, NDE and documentation needs.<\/p>\n","protected":false},"author":1,"featured_media":3373,"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":[545,257,363,612,610,615,611,614,613,616,609,150],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"de","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\/de\/wp-json\/wp\/v2\/posts\/3372"}],"collection":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/comments?post=3372"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3372\/revisions"}],"predecessor-version":[{"id":3374,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3372\/revisions\/3374"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/media\/3373"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/media?parent=3372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/categories?post=3372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/tags?post=3372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}