| All data is for information only------(<---links) | |
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| PRODUCT DATA of AISI 420 |
| Material | AISI 420 |
| Product Datasheet | 420_Data_Sheet |
| General Information | Martensitic stainless steel |
| Precautions | This type should not be used for heavily stressed parts that operate at subzero temperatures. |
| Chemical Composition | Fe-13Cr-0.15C |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Equivalent Designations | 1.4021; X20Cr13 420 S37; Z20C13; 2303, 20X13, 2Cr13 |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 7.75 |
| Magnetic Properties | Ferromagnetic |
| ELECTRICAL PROPERTIES |
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| Electrical Conductivity | 3.15 %IACS |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 21.5 W/m.K |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | No specific corrosion protection required |
| Stress Corrosion Status | Moderate Resistance to SCC: Table 2 Remark:Tempering between 371oC and 593oC shall be avoided because corrosion and stress corrosion cracking resistance is lowered. Requires Stress corrosion evaluation form Data Quality: Design Data |
| EMF vs SCE | -0.17 V Remark: Measured in 3.5% NaCl solution. Passive condition Data Quality: Design Data |
| Bimetallic Corrosion | Can be connected without any restriction to: Cr, Au, Ag, Gun-metal, P-bronzes, Sn-bronzes, Ti+alloys, Ni, Monel, Inconel, Ni/Mo alloys
Can be connected in a non-controlled environment to the above and Cd, austenitic cast iron, Cu, Brasses, Al-bronzes, Si-bronzes, Au, Pt, C, Rh, Sn-Pb alloys, Sn, Pb, 300 series stainless steels Can be connected in a clean room environment to above and Al-Cu alloys Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 Table 5.1 Data Quality: Design Data |