302 Stainless Steel is a commonly used engineering material. This page provides a complete data sheet including composition, mechanical properties, thermal properties, and typical applications. Use this information for material selection, engineering design, and comparison with similar grades.
Alloy 302 (also know as 18-8) is an austenitic stainless steel it provides useful resistance to corrosion on a wide range of moderately oxidising to moderately reducing environments. Alloy 302 is a slightly higher carbon version of 304, often found in strip and wire forms. It is a tough, ductile grade that demonstrates comparable corrosion resistance, is non-magnetic, and is not hardenable by heat treatment. Alloy 302 is usually used in its annealed condition and has a high ease of fabrication and formability. Alloy 302 is used widely in equipment and utensils for processing and handling of food, beverages and dairy products. Heat exchangers, piping, tanks and other process equipment in contact with fresh water also utilise these alloys. Building facades and other architectural and structural applications exposed to non-marine atmospheres also heavily utilise the 18-8 alloys. In addition, a large variety of applications involve household and industrial chemicals.
TYPICAL APPLICATIONS
Commercial applications for this engineering material include:
- Springs
- Washers
- Screens
- Pressure vessels
- Pressure containing applications
- Sanitary & cryogenic applications
ASTM/ASME: UNS S30200, EURONORM: FeMi35Cr20Cu4Mo2, DIN: 1.4300, Alloy 302, 18-8, X12CrNi188
Carbon (C) 0.0 - 0.15 %
Chromium (Cr) 18 %
Iron (Fe) 70 %
Manganese (Mn) 0.0 - 2.0 %
Nickel, Ni 9.0 %
Phosphorus (P) 0.0 - 0.045 %
Silicon (Si) 0.0 - 1.0 %
Sulfur (S) 0.0 - 0.030 %
| Metric | Imperial | |
|---|---|---|
| Dielectric Strength | ∞V/m | ∞V/ft |
| Electric Resistivity (@ 20 °C) | 72 µΩcm | 28.30 µΩin |
| Magnetic Permeability | 1.02 | 1.02 |
| Metric | Imperial | |
|---|---|---|
| Ductility | 57 % | 57 % |
| Friction Coefficient (static) | 0.06-0.15 | 0.06-0.15 |
| Hardness, Rockwell B | 80 | 80 |
| Poissons Ratio | 0.29 | 0.29 |
| Proof Stress | 200 Mpa | 29007.54 psi |
| Mass Density | 7860 Kg/m3 | 490.68 lb/ft3 |
| Shear Modulus | 77 Gpa | 11167.90 ksi |
| Tensile Strength | 585 MPa | 84847.05 psi |
| Yield Strength | 255 MPa | 36984.61 psi |
| Youngs Modulus | 193 GPa | 27992.28 ksi |
| Metric | Imperial | |
|---|---|---|
| Coefficient of Thermal Expansion (Linear @ 0-100°C) | 17.3 x 10-6 °C-1 | 9.62 x 10-6 °F-1 |
| Melting Point | 1400 °C | 2552.00-32.00 °F |
| Service Temperature in Air Intermittent | 870 °C | 1598.00 °F |
| Service Temperature in Air Continous | 925 °C | 1697.00 °F |
| Specific Heat Capacity | 0.5 J/g-°C | 220.93 BTU/lb-°F |
| Thermal Conductivity | 16 W/mK | 9.24 BTU/hr ft |