Special steels—overview
Basis for the range of welding-procedure qualification. For special steels, the group and subgroup are decisive, not only the steel designation.
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Basis for the range of welding-procedure qualification. For special steels, the group and subgroup are decisive, not only the steel designation.
Verify the material group, thickness, diameter, process, position, filler material, heat input, preheat, interpass temperature and PWHT.
For special steels, it is not enough that a person ‘can weld steel’. The qualification range must cover the process, material group, welding position, thickness and weld type.
Pressure equipment, piping, power-generation, LNG or chemical-industry applications may require Charpy testing, hardness, corrosion testing, ferrite measurement, CTOD or a precisely controlled PWHT cycle.
What the module covers
- Special steels — standards and technology overview
- Filler-material group
- WPQR qualification range
- Welder qualification
- Additional requirements
- 1. Standards relationships by steel type
- 2. Practical procedure before welding a special steel
- What the documentation should contain
Continue with the practical module.
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