X210Cr12
1.2080High-carbon high-chromium cold-work tool steel. Excellent wear resistance and dimensional stability after heat treatment. Used for blanking and forming dies, drawing mandrels, gauges, shear blades, and thread rolling dies. Not suitable for impact loading.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI D3 | T30403 | REF |
| 🇺🇸 | AISI | USA | D3 | — | % |
| 🇪🇺 | EN | Europe | X210Cr12 | 1.2080 | 100% |
| 🇯🇵 | JIS | Japan | SKD1 | — | 93% |
| 🇨🇳 | GB | China | Cr12 | — | 90% |
| 🇷🇺 | GOST | Russia | Kh12 | — | 88% |
Sources: ASTM A681, AISI, EN ISO 4957, JIS G4404, GB/T 1299, GOST 5950
Chemical composition comparison (wt%)
Side-by-side: X210Cr12 (EN) (EN ISO 4957) vs AISI D3 (AISI) (ASTM A681)
| Element | X210Cr12 (EN) | AISI D3 (AISI) | Overlap |
|---|---|---|---|
| C | 1.9–2.2% | 2–2.35% | Partial ⚠️ AISI upper limit 0.15% higher |
| Si | 0.1–0.4% | 0.1–0.6% | OK |
| Mn | 0.2–0.6% | 0.2–0.6% | OK |
| P | 0–0.03% | — | — |
| S | 0–0.03% | — | — |
| Cr | 11–13% | 11–13.5% | OK |
| V | ≤ 0.15% | — | — |
Mechanical properties
QT
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | 58–64 | HRC |
| Elastic Modulus | ≥ 210 | GPa |
| Density | ≥ 7.7 | g/cm3 |
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB | ≤ 255 | HB |
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB | ≤ 250 | HB |
Hardened + Tempered
| Property | Value | Unit |
|---|---|---|
| Hardness HRC | 60–64 | HRC |
General
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
Soft-Annealed
| Property | Value | Unit |
|---|---|---|
| hardness_brinell | ≤ 255 | HB |
| Density | ≥ 7.7 | g/cm3 |
| Elastic Modulus | ≥ 210 | GPa |
Hardened+Tempered
| Property | Value | Unit |
|---|---|---|
| hardness_rockwell | 58–63 | HRC |
Heat treatment
| Process | Temperature | Medium | Holding Time | Notes |
|---|---|---|---|---|
| quenching | 940–980 °C | oil | 20-30 min | Preheat in stages: 650°C then 850°C before austenitizing |
| Soft annealing | 830–860 °C | Furnace cooling | — | Cool 20°C/h, max 250 HB |
| tempering | 180–300 °C | air | 2x 60 min | Double temper recommended. Higher temp = lower hardness + better toughness |
| Hardening | 950–980 °C | Oil | — | Preheat 650°C, oil quench |
| annealing | 800–850 °C | furnace | 2-4 hours | Slow furnace cool. Max 255 HB |
| Tempering | 150–300 °C | Air | — | Low temper only: 180°C→63 HRC. No secondary hardness. |
Compatibility verdict
X210Cr12 and AISI D3: 95% composition match
Close equivalents but NOT identical. Critical differences: C range (1.9–2.2 vs 2–2.35), Si range (0.1–0.4 vs 0.1–0.6), Cr range (11–13 vs 11–13.5).
For dual certification, melt must hit: C 2–2.2, Si 0.1–0.4, Cr 11–13
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