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Ultra Clean non-copper-coated TIG rods and solid wire for the TIG welding of creep-resistant P91 steels, modified with Nb, V, and N additions. The chemical composition is optimized with Ni + Mn < 1% to allow for higher PWHT temperatures. P91 is widely used in headers, main steam lines, and turbines in fossil-fuel power plants, including next-generation combined cycle power plants (CCPP). Controlled X-factor (Xf) < 10. To be welded with 100% Ar shielding gas.
| C | 0.10 |
| Mn | 0.60 |
| Si | 0.40 |
| Cr | 9.00 |
| Mo | 0.95 |
| Ni | 0.30 |
| V | 0.22 |
| N | 0.05 |
| Nb | 0.04 |
| W | 1.60 |
| B | 0.003 |
| Gas | l1 | |||
| Yield strength | 650 MPa | |||
| Tensile strength | 750 MPa | |||
| Elongation | 18% | |||
| Hardness | +20° C: 100 | |||
| Impact test Kv | +20° C: 130 +0° C: >27 |
| ASTM | ||
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| EN | ||
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