TIG welding rods
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DIN EN ISO: 21952-A W CrMo91AWS: A5.28 ER90S-B91Material no.: 1.4903
TIG welding rods for creep resisting steels
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Characteristics and application
TIG/GTAW rod for high temperature, creep resistant, modified 9%Cr-1%Mo martensitic steel (T91/P91). T91/P91 steel is commonly used at service temperatures up to 600°C. V, Nb and N additions provide this ‘creep strength enhanced ferritic’ (CSEF) alloy with improved high temperature creep resistance compared to standard CrMo creep resistant alloys. Alloy T91/P91 is widely used in the power generating industry for fossil fuel ultra-super-critical (USC) power plant boilers and turbines; the alloy is also finding applications in the chemical and oil and gas industries.
Base materials
For matching P91, 9%Cr-1%Mo modified, creep resisting martensitic steels.
X10CrMoVNB 9 1
ASTM: A182/A336 F91, A213 T91, A217 C12A, A234 WP91, A335 P91, A387 91
Classifications
| DIN EN ISO | 21952-A W CrMo91 |
|---|---|
| AWS | A5.28 ER90S-B91 |
| Material no. | 1.4903 |
Typical analysis in %
| C | Si | Mn | Cr | Ni | Mo | V | Nb |
|---|---|---|---|---|---|---|---|
| 0,10 | 0,32 | 0,50 | 9,20 | 0,45 | 0,95 | 0,20 | 0,05 |
Mechanical properties
| Yield strength (MPa) | ≥ 520 |
|---|---|
| Tensile strength (MPa) | ≥ 620 |
| Elongation (%) | 4d/5d: ≥16 |
| Charpy-V value (ISO-V, J) | RT ≥ 47 |
Typical heat treatment
Preheat temperature: 200°C
Interpass temperature: max. 300°C
PWHT: 760°C
Approvals
- TÜV 11950, CE
Documentation
Official Fliess publication for the programme as a whole, not for the individual item.
Related products
Related products from the Fliess programme, with the welding process. Not a claim of technical interchangeability.
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