X12CrCoW2MoVNbB9-2
Alloy SteelX12CrCoW2MoVNbB9-2
9Cr-W-V-Nb heat-resistant steel, ultra-supercritical. (EN 10216-2; equiv EN 1.4901 / ASTM A335 P92). Nominal values—confirm mill certificate.
Chemical Composition (%)
| C | 0.07 |
|---|---|
| CR | 8.5 |
| MO | 0.9 |
| W | 1.5 |
| V | 0.15 |
| NB | 0.03 |
Mechanical Properties
Tensile:≥700 MPa;Yield:≥500 MPa
Chinese Standard
EN 10216-2 X12CrCoW2MoVNbB9-2
Equivalent Standards
ASTM A335 P92
Equivalent Grades
EN 1.4901
Applications
9Cr-W-V-Nb耐热钢，超超临界。,"Tube
Available Forms
Plate"
Uses
Tool and die steel for cutting, forming, punching and molding tools. Tungsten/molybdenum (≈1.75%/1%) give hot hardness and red-hardness for high-speed and hot-work tools. High chromium (≈9%) provides wear resistance and secondary hardening. Applied to blanks, punches, extrusion dies, shear blades, plastic-mold and cold-work tooling.
Heat Treatment
Powder/HSS: preheat 800–850 °C, austenitize 1180–1230 °C (salt or vacuum), quench, triple temper 540–570 °C to ≈64–66 HRC.
Precautions
Risk of quench cracking and distortion — use graded preheating, controlled cooling and multiple tempers. Avoid overheating the austenitizing temperature. Machine in the soft annealed condition; allow for dimensional change after heat treatment. Grind with coolant to prevent rehardening cracks.
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