| All data is for information only------(Home) | |
|---|---|
| PRODUCT DATA of AISI 348 |
| Material | AISI 348 |
| General Information | Similar to AISI 347,but with a maximum Ta concentration of 0.1%. This grade was designed for nuclear applications to avoid long-life isotopes produced by irradiation of Tantalum |
| Effects of Space environment | The natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials. |
| EXPERIENCE IN PRACTICE |
|---|
| Development Status | Commercial Product |
| Cost Range | Low |
| Lot Reproducibility | Good |
| Equivalent Designations | S30348 |
| Space Experience | Good |
| PHYSICAL PROPERTIES |
|---|
| Crystal Structure | Face centered cubic (fcc) |
| Specific Gravity | 7.96 |
| Magnetic Properties | Nonmagnetic |
| ELASTIC PROPERTIES |
|---|
| Tensile Modulus | 193 GPa |
| Poisson Ratio | 0.3 |
| ELECTRICAL PROPERTIES |
|---|
| Electrical Volume Resistivity | 7.2e-7 ohm.m |
| Electrical Conductivity | 2.4 %IACS |
| THERMAL PROPERTIES |
|---|
| Thermal Conductivity | 16.3 W/m.K |
| Thermal Expansion Coefficient | 16.6 μstrain/°C |
| Specific Heat | 0.5 J/g.K |
| Melting Range | 1400 to 1450 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
|---|
| 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 |
| 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 |
|---|
| 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 |