90MnCrV8
1.2842Universal cold work tool steel with high carbon and manganese. Oil hardening (AISI O2). Excellent dimensional stability during heat treatment, good wear resistance, and high hardness up to 63 HRC. Easy to machine in annealed condition. Used for blanking and stamping tools, precision punches, shear blades, thread chasers, reamers, measuring gauges, woodworking tools, and cold forming dies. Equivalent to AISI O2.
Chemical composition comparison (wt%)
Side-by-side: 90MnCrV8 (EN) (EN ISO 4957) vs ASTM
| Element | 90MnCrV8 (EN) | ASTM | Overlap |
|---|---|---|---|
| C | 0.85–0.95% | — | — |
| Si | 0.1–0.4% | — | — |
| Mn | 1.8–2.2% | — | — |
| P | ≤ 0.03% | — | — |
| S | ≤ 0.03% | — | — |
| Cr | 0.2–0.5% | — | — |
| V | 0.05–0.2% | — | — |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB | ≤ 229 | HB |
QT
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | 58–63 | HRC |
| Density | ≥ 7.66 | g/cm3 |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| annealing | 680–720 °C | furnace | — | Soft annealing, max 229 HB |
| hardening | 790–820 °C | oil | — | Oil quench, 63 HRC achievable |
| tempering | 180–220 °C | air | — | Min 2 cycles |
Related materials
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M2 / HS6-5-2
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