Learn when ER80S-B2 is used with P11 and P12 Cr-Mo steels and why matching, preheat, PWHT, code, and WPS approval remain essential.
ER80S-B2 is commonly associated with compatible 1.25Cr-0.5Mo materials, including selected P11 and P12 piping applications. The complete material specification and procedure must be reviewed before use.
Why Is ER80S-B2 Considered?
Its chromium-molybdenum composition is designed to provide a compatible weld deposit for this alloy family.
Are P11 and P12 Identical?
No. Even when grouped within related Cr-Mo applications, material specifications, product forms, allowable chemistry, heat treatment, and code requirements may differ.
What Procedure Controls Are Important?
- Base-metal verification
- Joint cleanliness
- Preheat
- Interpass temperature
- Heat input
- Welding sequence
- Hydrogen control
- Controlled cooling
- PWHT
- Required NDT
Is PWHT Always Required?
Many P11/P12 applications require PWHT, but thickness, code, service, and procedure determine the final requirement.
What Should Buyers Specify?
Provide the exact ASTM/ASME material designation, process, diameter, heat-treatment condition, required properties, quantity, and documentation.
Dayang Welding supplies ER80S-B2 for Cr-Mo fabrication while recommending that all P11/P12 applications follow the approved WPS and governing code.
