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AISI Type 420 |
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| Category | Steel |
| Class | Stainless steel |
| Type | Martensitic standard |
| Common Names | Chromium steel |
| Designations |
France: AFNOR Z 20 C 13
Germany: DIN 1.4021
Italy: UNI X 2O Cr13
Japan: JIS SUS 420 J1
Sweden: SS 2303
United Kingdom: B.S. 420 S 37 , B.S. CDS-18
United States: AMS 5506 , AMS 5621 , ASTM A276 , ASTM A314 , ASTM A473 , ASTM A580 , FED QQ-S-763 , FED QQ-S-766 , FED QQ-W-423 , MIL SPEC MIL-S-862 , SAE 51420 , SAE J405 (51420) , UNS S42000
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| Composition |
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| Element | Weight % |
| C |
0.15 (min) |
| Mn |
1.00 |
| Si |
1.00 |
| Cr |
12.0-14.0 |
| P |
0.04 |
| S |
0.03 |
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| Mechanical Properties |
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| Properties | Conditions |
| T (°C) | Treatment |
| Density (×1000 kg/m3) |
7.8 |
25 |
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| Poisson's Ratio |
0.27-0.30 |
25 |
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| Elastic Modulus (GPa) |
200 |
25 |
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| Tensile Strength (Mpa) |
860 |
25 |
annealed, cold finished (wire) more |
| Yield Strength (Mpa) |
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| Elongation (%) |
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| Reduction in Area (%) |
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| Hardness (HRC) |
52 |
25 |
tempered at 205°C (bar) |
| Thermal Properties |
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| Properties | Conditions |
| T (°C) | Treatment |
| Thermal Expansion (10-6/ºC) |
10.3 |
0-100 more |
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| Thermal Conductivity (W/m-K) |
24.9 |
100 |
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| Specific Heat (J/kg-K) |
460 |
0-100 |
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| Electric Properties |
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| Properties | Conditions |
| T (°C) | Treatment |
| Electric Resistivity (10-9W-m) |
550 |
25 |
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