1.4021 stainless steel equivalent
Jul 14, 2025
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If you're sourcing 1.4021 stainless steel or its global equivalents, it's important to understand how this material compares across international standards like AISI, ASTM, JIS, and EN. Known for its good wear resistance and moderate corrosion resistance, 1.4021 is a popular martensitic stainless steel used in mechanical components, knives, and shafts.
This article helps engineers, procurement managers, and manufacturers identify equivalent grades, compare properties, and make the right material choice for specific applications.
What is 1.4021 Stainless Steel?
1.4021 is a martensitic stainless steel according to EN 10088-1, with the steel name X20Cr13. It contains about 0.20% carbon and 13% chromium, providing good mechanical strength and moderate corrosion resistance, especially after hardening and tempering.
What is the equivalent of 1.4021 stainless steel?
| Standard | Equivalent Grade | Notes |
|---|---|---|
| AISI / SAE | AISI 420 (AISI 420A) | Closest U.S. equivalent; may vary slightly in C content |
| ASTM | ASTM A276 Type 420 | Common for bar and mechanical components |
| JIS | SUS420J1 | Japanese equivalent; used for similar applications |
| DIN | X20Cr13 (same as EN) | German designation; identical to EN 1.4021 |
| GB (China) | 2Cr13 | Chinese standard grade; used in pumps, valves, etc. |
Chemical composition(wt.%) of 1.4021 grade: BS EN 10088-1
| Elements | Min.(≥) | Max.(≤) |
| C | 0.16 | 0.25 |
| Si | - | 1.00 |
| Mn | - | 1.50 |
| P | - | 0.04 |
| S | - | 0.015 |
| Cr | 12.00 | 14.00 |
| Ni | - | - |
| Mo | - | - |
1.4021 stainless steel Mechanical Properties (After Heat Treatment)
| Property | Value |
|---|---|
| Tensile Strength | 700 – 850 MPa |
| Yield Strength | ≥ 500 MPa |
| Elongation | ≥ 10% |
| Hardness (HB) | 200 – 250 (annealed) |
| Hardness (HRC) | Up to 50 (quenched + tempered) |
1.4021 Stainless Steel Heat Treatment & Processing
Hardening Temperature: 980–1050°C (followed by oil or air cooling)
Tempering Range: 150–400°C depending on required hardness
Weldability: Limited due to high carbon content-preheat and post-weld tempering recommended
Machinability: Fair in annealed condition; improved with proper tool setup
Applications of 1.4021 Stainless Steel
Pump and valve parts
Cutlery and surgical instruments
Turbine blades
Shafts and spindles
Mechanical components requiring wear resistance
Kitchen knives and scissors
What is the standard of X20Cr13 stainless steel ?
| Grade : | X20Cr13 | ||
| Number: | 1.4021 | ||
| Classification: | Martensitic stainless steel | ||
| Density: | 7.7 g/cm ³ | ||
| Standard: |
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Need help sourcing 1.4021 stainless steel or its equivalent (AISI 420, SUS420J1, 2Cr13)?
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