SUS420J2 /X30Cr13 / 1.4028 stainless steel
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What Is SUS420J2 / X30Cr13 / 1.4028 Stainless Steel?
SUS420J2, also known as X30Cr13 or EN 1.4028, is a high-carbon martensitic stainless steel offering superior hardness, wear resistance, and moderate corrosion resistance. With a chromium content of approximately 13% and a carbon content of ~0.30%, this grade is widely used in precision components requiring strength and sharpness, such as knife blades, surgical tools, and valve parts.
What is the equivalent of 420J2 stainless steel?
| EU EN |
USA - |
Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Italy UNI |
China GB |
Sweden SS |
Poland PN |
Czechia CSN |
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What is the Chemical Composition (Typical %) of sUS 420J2?
| Element | Content (%) |
|---|---|
| C | 0.26 – 0.35 |
| Cr | 12.5 – 14.5 |
| Mn | ≤ 1.00 |
| Si | ≤ 1.00 |
| P | ≤ 0.04 |
| S | ≤ 0.03 |
| Fe | Balance |
1.4028 Stainless Steel Mechanical Properties (After Hardening & Tempering)
| Property | Heat-Treated (+QT) | Annealed Condition |
|---|---|---|
| Tensile Strength, Rm | 800 – 1000 MPa | – |
| Yield Strength, Re | > 600 MPa | < 740 MPa |
| Elongation, A | > 10% | > 15% |
| Hardness (HRC) | 45 – 51 | – |
| Hardness (HV) | 450 – 550 | < 235 HV |
| Hardness (HB) | – | < 235 HB |
| Hardness (HRB) | – | < 97 HRB |
| Thermal Capacity (cp at 20°C) | 460 J·kg⁻¹·K⁻¹ | – |
| Thermal Conductivity (λ) | 30 W·m⁻¹·K⁻¹ | – |
| Modulus of Elasticity (E) | 215 GPa | – |
| Linear Expansion Coefficient (α) | 10.5 × 10⁻⁶ K⁻¹ | – |
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Density |
– | 7.72 g/cm³ |
What is the difference between SUS420J2 and SUS420J1?
SUS420J2 has a higher carbon content (~0.30%) than SUS420J1 (~0.20%), enabling greater hardness and edge retention, but with slightly lower toughness.
Is SUS420J2 corrosion resistant?
It provides moderate corrosion resistance in dry or mildly moist environments, especially when hardened and polished. It's less corrosion-resistant than 304 or 316.
Can 1.4028 stainless steel be welded?
Welding is possible but not generally recommended due to the high carbon content, which increases the risk of cracking. Post-weld heat treatment is advised if welding is necessary.
Where to buy SUS420J2 steel sheet-GNEE
Looking for a reliable source for SUS420J2 / 1.4028 stainless steel plate ? Gnee offers customized dimensions, technical advice, and fast lead times for industrial applications.
Reasons to choose GNEE
1. Custom Processing: Cut-to-length plates, precision-ground bars, and heat-treated blanks available.
2.Material Certification: Full MTCs per EN 10204 3.1, with optional ultrasonic testing and IGC test for critical parts.
3.Fast Global Delivery: Inventory in coil, sheet, round bar, and block form ready for shipment across 60+ countries.
