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Why Is There Weld Testing?. ASM – AWS (NTX) Joint Meeting Michael S. Beaton, PE 17 February, 2011. 34 PAGES OF CODES, SPECIFICATIONS, AND RECOMMENDED PRACTICES . D1.1 STRUCTURAL WELDING CODE – STEEL D1.2 –ALUMINUM D1.3 – SHEET STEEL D1.4 -REINFORCING STEEL D1.5 BRIDGE WELDING.
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Why Is There Weld Testing? ASM – AWS (NTX) Joint Meeting Michael S. Beaton, PE 17 February, 2011
34 PAGES OF CODES, SPECIFICATIONS, AND RECOMMENDED PRACTICES D1.1 STRUCTURAL WELDING CODE – STEEL D1.2 –ALUMINUM D1.3 – SHEET STEEL D1.4 -REINFORCING STEEL D1.5 BRIDGE WELDING AWS WELDING CODES
D1.6 -Structural Welding Code—Stainless Steel D1.8 Structural Welding Code -Seismic Supplement D1.9 Structural Welding Code—Titanium D3.6 UNDERWATER WELDING ASME BPVC API 1104 AAR Appendix W ABS Other industries and companies, automotive, airframe & powerplant, Navy Nuclear … AWS WELDING CODES, cont.
-in QW-100.1: “The purpose for qualification of a WPS is to determine that the weldment proposed for construction is capable of providing the required properties for its intended application. Welding procedure qualification establishes the properties of the weldment,…” -in QW-100.2: “In performance qualification, the basic criterion established for welder qualification is to determine the welder’s ability to deposit sound weld metal.” ASME BOILER & PRESSURE VESSEL CODE – Section IX
What do we test? Visual Inspection
What do we test? • Transverse-weld Tensiles • (generally, two per WPS qualification) • Full size tube • All-Weldmetal Tensile
Installing an Extensometer on an All-Weldmetal Tensile Sample
What do we test? • Bends • (generally, four per WPS qualification) • 2-root + 2-face, or • 4-side • (depends on material thickness) Good
failed by Lack of Fusion (cracks greater than 1/8") failed due to complete fracture
tube weld, root bend: failed because of Lack of Fusion to root
What do we test? • NICK BREAK
What do we test? • Charpy V-Notch Impact • Weld (CW) • HAZ (CH) • Fusion Line • Fusion Line +1mm • Fusion Line +5mm
What do we test? • CHARPY’s -Sets of three – most Codes • Set of five, take middle three – AWS D1.5 WELD HAZ
What do we test? • Hardness Surveys • NACE • API • EN • others VICKERS INDENTATIONS
What do we test? • MICROSTRUCTURAL ANALYSIS • Volume Fraction by Systematic Manual Point Count (E562)
Mixed filler metal deposits discovered in a weld cross section
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