| All data is for information only------(<---links) | |
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| PRODUCT DATA of AISI 302 |
| Material | AISI 302 |
| General Information | Higher carbon modification of Type 304 for higher strength on cold rolling. Type 302 is strengthened by cold working. If cold-worked Type 302 is subjected to temperatures above 480C, its room-temperature strength is reduced. |
| Precautions | Type 302 should not be used for extended periods at temperatures of 400 to 900C and should not be cooled slowly from higher temperatures through this range. |
| Effects of Space environment | The natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials. |
| Chemical Composition | 17-19Cr, 8-10Ni, <2Mn, <0.15C, rem Fe |
| Name of Manufacturer | many suppliers |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Cost Range | Low |
| Lot Reproducibility | Good |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 7.86 |
| Magnetic Properties | Nonmagnetic |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 193 GPa |
| Poisson Ratio | 0.25 |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 7.15e-7 ohm.m |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 12.3 W/m.K |
| Melting Range | 1400 to 1420 °C |
| Specific Heat | 0.5 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 Data Quality: Design Data |
| EMF vs SCE | -0.09 V Remark: Measured in 3.5% NaCl solution Data Quality: Design Data |
| Bimetallic Corrosion | Can be connected without any restriction to: Cr, Au, Pt, C, Rh, Ag, Gun-metal, P-bronzes, Sn-bronzes, Ti+alloys
Can be connected in a non-controlled environment to the above and Cd, Cu, Brasses, Ni, monel, inconel, N-Mo alloys, 400 series stainless steel Can be connected in a clean room environment to above and Al-Cu alloys, Cu-Ni alloys, Al-bronzes, Si-bronzes Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 Table 5.1 Data Quality: Design Data |
| FLUID SYSTEMS COMPATIBILITY |
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| Gaseous Oxygen (GOX) | Meets the mechanical impact requirements. No batch test required. |
| Liquid Oxygen (LOX) | Meets the mechanical impact requirements. No batch test required. |
| Nitrogen Tetroxide (N2O4) | SCC susceptibility is low and no fluid decomposition |
| Hydrazine (HDZE) | SCC susceptibility is low and no fluid decomposition |
| SPECIAL RECOMMENDATIONS |
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| Special Recommendations | Type 302 should not be used for extended periods at temperatures of 400 to 900C and should not be cooled slowly from higher temperatures through this range. Prolonged exposure of the nonstabilized grades to temperatures between 400 and 900C makes them susceptible to intergranular corrosion. This alloy is non-magnetic in the annealed condition but becomes magnetic on cold work. |