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Weldability

The capability of a material to be welded successfully while achieving the required mechanical properties and service performance.

Definition

Weldability is the ability of a material to be welded using an appropriate welding process while producing a sound weld that satisfies the required mechanical properties, metallurgical characteristics and intended service conditions. Weldability is influenced by material composition, welding process, joint design, heat input and post-weld heat treatment requirements.

Why It Matters

Weldability describes the suitability of a material for producing sound welds that satisfy engineering and service requirements.

In Practice

Weldability varies significantly between materials and must be considered when selecting welding procedures, filler materials, preheat requirements and post-weld heat treatment to achieve acceptable weld quality and long-term performance.

Common Misuse

Weldability describes the inherent suitability of a material for welding, whereas a Welding Procedure Specification defines the approved method used to weld that material.

Term Details
Synonyms:
Weldability; Material Weldability; Weld Characteristics; Welding Characteristics
Classification:
Materials Engineering
Concept
Advanced
Applications

Welding; Materials Engineering; Metallurgy.

Where It's Used

Manufacturing.; Pressure vessels.; Piping.; Petrochemical.; Oil and gas.

References

ISO/TR 581; AWS Welding Handbook

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