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

QUALITY PHILOSOPHY

• QUALITY is a fundamental business strategy for Trinity Metals Laboratory.

• Our GOAL is to be the best provider of testing services in our market in terms of accuracy, dependability, and value to our customers.

• We are committed to providing our customers with consistently high quality testing services, – defect free – on time – at competitive prices.