1. Summary of SUS420J2
High carbon martensitic steel grade, excellent quench hardening ability, used in products that require high-strength mechanical properties.
2. Features of SUS420J2
1) High abrasion resistance;
2) High strength;
3) The strength can be improved by quenching heat treatment;
4) Magnetic.
3. Scope of application
Household and industrial knives, scissors, etc. that require high strength and hardness; mechanical parts that require wear resistance, etc.
4. Chemical composition (JIS G 4305-2005) (wt%)
Chemical composition | C | Si | Mn | P | S | Cr |
Standard | 0.26~0.40 | £1.00 | £1.00 | £0.04 | £0.030 | 12.0~14.0 |
| General | 0.30 | 0.50 | 0.50 | 0.022 | 0.002 | 13.20 |
5. Performance (JIS G 4305-2005)
Distinguish | Mechanical properties | Note | |||
| Ys (Mpa) | Ts (Mpa) | El (%) | Hv | ||
| Standard | ≥ 225 | ≥ 540 | ≥ 18 | ≤ 247 | NO.2B/0.7t |
General | 370 | 625 | 23 | 180 | |
6. Physical properties
Density (g/cm3) | Magnetic | Specific heat 250C (J/kg.0C) | Thermal conductivity 1000C(W/m. 0C) | Thermal expansion rate20~1000C (10-6/0C) |
| 7.75 | with | 460 | 23.8 | 10.3 |
7. Use status
1) Annealing and solid solution state:
NO. 1, 2B, etc.
2) Quenched state.