Typical Applications
Fasteners
Flanges
Valves
Pressure fittings
Chemical Composition (as % by mass)
| C | Mn | Cr | Ni | Mo | N | |
Typical | 0.02 | 18.1 | 8.1 | |||
ASME II A SA-240 | ≤0.030 | ≤2.00 | 17.5-19.5 | 8.0-12.0 | ≤0.10 | |
ASTM A240 | ≤0.030 | ≤2.00 | 17.5-19.5 | 8.0-12.0 | ≤0.10 | |
ASTM A666 | ≤0.030 | ≤2.00 | 18.0-20.0 | 8.0-12.0 | ≤0.10 | |
EN 10028-7 | ≤0.030 | ≤2.00 | 17.5-19.5 | 8.0-10.5 | ≤0.10 | |
IS 6911 | ≤0.030 | ≤2.00 | 17.5-19.5 | 8.0-12.0 | ≤0.70 | ≤0.10 |
Mechanical Properties
| Standard | Rp0.2 | Rp1.0 | Rm | Elongation | Rockwell | HB |
MPa | MPa | MPa | % | |||
Cold rolled coil and sheet | ||||||
Typical (thickness 1 mm) | 295 | 325 | 650 | 70 | ||
ASME II A SA-240 | ≥ 170 | ≥ 485 | ≤ 201 | |||
ASTM A240 | ≥ 170 | ≥ 485 | ≤ 92HRB | ≤ 201 | ||
EN 10028-7 | ≥ 220 | ≥ 250 | 520-700 | ≥ 45 | ||
| IS 6911 | ≥ 170 | ≥ 485 | ≤ 92HRB | ≤ 201 | ||
Physical Properties
Values according to EN 10088
| Density | Modulus of elasticity | Thermal exp. at 100 °C | Thermal conductivity |
kg/dm3 | GPa | 10-6/°C | W/m°C |
7.9 | 200 | 16.0 | 15 |
Possible alternative grades to 304 grade stainless steel
Grade | Why it might be chosen instead of 304 |
301L | A higher work hardening rate grade is required for certain roll formed or stretch formed components. |
302HQ | Lower work hardening rate is needed for cold forging of screws, bolts and rivets. |
303 | Higher machinability needed, and the lower corrosion resistance, formability and weldability are acceptable. |
316 | Higher resistance to pitting and crevice corrosion is required, in chloride environments |
321 | Better resistance to temperatures of around 600-900 °C is needed…321 has higher hot strength. |
3CR12 | A lower cost is required, and the reduced corrosion resistance and resulting discolouration are acceptable. |
430 | A lower cost is required, and the reduced corrosion resistance and fabrication characteristics are acceptable. |
