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| PRODUCT DATA of AISI 444 |
| Material | AISI 444 |
| Product Datasheet | 444_Data_Sheet |
| General Information | Ferritic stainless steel |
| Chemical Composition | 17.5-19.5Cr, 1.75-2.5Mo, 1Ni,0.03C, 0.44min Ti+Nb, rem Fe |
| EXPERIENCE IN PRACTICE |
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| Equivalent Designations | ASTM A176 , SAE 51444 |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 7.8 |
| Magnetic Properties | Ferromagnetic |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 6.2e-7 ohm.m |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 26.8 W/m.K @ 100C |
| Thermal Expansion Coefficient | 10 μstrain/°C Remark: from 0 to 100C |
| Specific Heat | 0.42 J/g.K |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| General Corrosion Status | No specific corrosion protection required |
| Stress Corrosion Status | High Resistance to SCC: Table 1 Remark: Tempering between 371C and 593C shall be avoided because corrosion and stress corrosion cracking resistance is lowered. 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 |