JIS G4303 SUS 321 Introduce
JIS G4303 SUS 321 stainless steel offers a wide range of applications for both industrial and domestic roles. Its high corrosion resistance makes it suitable for many demanding applications such as chemical processing and medical equipment. Its high temperature strength makes it ideal for exhaust systems and turbines while its low thermal expansion coefficient makes it ideal for automotive and aerospace applications.
Smelting temperature:1573°C - 1764°C
Application:Stainless steel rod
JIS G4303 SUS 321 Material Chemical Composition
The chemical composition of the JIS G4303 SUS 321 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 9.0000 | 13.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| Carbon (C) | - | 0.0800 |
JIS G4303 SUS 321 Material Mechanical Properties
The mechanical properties of the JIS G4303 SUS 321 steel are as follows:
| YieldRp0.2 | ≤ 294 (MPa) |
| TeileRm | ≤ 622 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 424 |
JIS G4303 SUS 321 Material Thermal Properties
The thermal performance parameters of the JIS G4303 SUS 321 steel are as follows:
| Temperature (°C) | 23 | 112 | 163 |
| Modulus of elasticity (GPa) | - | 748 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 331 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.22 | - | - |
| Deity (kg/dm³) | - | - | 424 |
| Poisson’s coefficient, ν | - | - | 222 |