2Cr13 vs 420
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
2Cr13
Stainless Steel
2Cr13 (new designation 20Cr13) is China’s 420-type martensitic stainless: a hardenable 13% chromium steel used Q&T for pump and valve shafts, fasteners and steam-turbine blades where moderate corrosion resistance meets real mechanical duty.
Standards: DIN 1.4021 (X20Cr13) · AISI 420 · JIS SUS420J1 · GB 2Cr13 (GB/T 1220) / 20Cr13 (GB/T 20878)
420
Stainless Steel
420 is a hardenable 13% chromium martensitic stainless used for cutlery, surgical instruments and wear parts. Note: DIN 1.2083 is the high-carbon (0.36–0.42% C) mold-steel variant of the 420 family, melted and specified for plastic mold cavities rather than general engineering use.
Standards: DIN 1.4021 · AISI 420 · JIS SUS420J1 · GB 20Cr13
Chemical composition compared (%)
| Element | 2Cr13 | 420 |
|---|---|---|
| C | 0.16–0.25 | ≥0.15 |
| Si | ≤1.00 | ≤1.00 |
| Mn | ≤1.00 | ≤1.00 |
| P | ≤0.040 | ≤0.040 |
| S | ≤0.030 | ≤0.030 |
| Cr | 12.00–14.00 | 12.00–14.00 |
| Ni | ≤0.60 | — |
Properties compared
| Property | 2Cr13 | 420 |
|---|---|---|
| Delivery condition | Annealed | Annealed (hardened for use) |
| Tensile strength | ≥640 MPa (Q&T, GB/T 1220) | 655–1700 MPa (condition dependent) |
| Density | 7.70 g/cm³ | 7.70 g/cm³ |
| Magnetic | Yes | Yes |
| Hardness (hardened) | — | 48–55 HRC |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 2Cr13 · 420. Substitution decisions for certified parts stay with the design authority.