| All data is for information only------(<---links) | |
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| PRODUCT DATA of AISI 321 |
| Material | AISI 321 |
| Product Datasheet | AK steel 321_Data_Sheet Aubert Duval 321_X18PA |
| General Information | Titanium stabilized for service in 425 to 870C range and to minimize carbide precipitation when welding for resistance to intergranular corrosion |
| 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, 9-12Ni, <2Mn, <0.08C, (5xC) Ti min, rem Fe |
| Name of Manufacturer | Aubert and Duval
22, rue Henri-Vuillemin • 92230 Gennevilliers - France 33 (0)1 55 02 58 00 33 (0)1 55 03 58 01 dircom@aubertduval.com www.aubertduval.com |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Cost Range | Low |
| Lot Reproducibility | Good |
| Equivalent Designations | UNS S30403, Z 2 CN 18-10, FE-PA11, FE-PA3901, X1CrNi18-10, X2CrNi19-11, X18BC |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
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| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 8 |
| Magnetic Properties | Nonmagnetic |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 193 GPa |
| Shear Modulus | 78 GPa |
| Poisson Ratio | 0.27 |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 2.83e-7 ohm.m |
| Electrical Conductivity | 2.41 %IACS |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 15.6 W/m.K |
| Thermal Expansion Coefficient | 16.6 μstrain/°C |
| 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: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data |
| EMF vs SCE | -0.08 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, 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 |