X155CrVMo12-1
1.2379High-performance cold work tool steel with 12% Cr for exceptional wear resistance and good toughness. Air or oil hardening. The most widely used high-alloy cold work steel for demanding stamping and forming applications. Achieves 58-62 HRC. Used for blanking dies, punching tools, cold-forming dies, thread rolling dies, deep drawing tools, and industrial knives for heavy-gauge sheet. Similar to AISI D2 but with optimized V content.
Chemical composition comparison (wt%)
Side-by-side: X155CrVMo12-1 (EN) (EN ISO 4957) vs ASTM
| Element | X155CrVMo12-1 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 1.5–1.6% | — | — |
| Si | 0.1–0.6% | — | — |
| Mn | 0.2–0.6% | — | — |
| P | ≤ 0.03% | — | — |
| S | ≤ 0.03% | — | — |
| Cr | 11–12% | — | — |
| Mo | 0.7–1% | — | — |
| V | 0.7–1% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB | ≤ 255 | HB |
QT
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | 58–62 | HRC |
| Density | ≥ 7.7 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| annealing | 800–840 °C | furnace | — | Soft annealing, slow cool |
| hardening | 1020–1040 °C | air | — | Air or oil quench; vacuum possible |
| tempering | 200–550 °C | air | — | Min 2 cycles; 200°C for max hardness, 520°C for secondary hardening |
Related materials
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