Transcript Why Is There Weld Testing? - Trinity Metals Laboratory
Why Is There Weld Testing?
ASM – AWS (NTX) Joint Meeting
Michael S. Beaton, PE 17 February, 2011
AWS WELDING CODES • 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, cont .
• 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 …
ASME BOILER & PRESSURE VESSEL CODE – Section IX • -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
.”
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
Defects in Weld Revealed by the Tensile Test
What do we test?
• Bends
• (generally, four per WPS qualification) • 2-root + 2-face, or • 4-side • (depends on material thickness)
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
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
Trinity Metals Laboratory
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