Stainless steel 304 is an austenitic chromium-nickel alloy known for its excellent corrosion resistance, good mechanical properties, and wide applicability in various industrial sectors.
Element | Content (%) |
Chromium (Cr) | 18.0 – 20.0 |
Nickel (Ni) | 8.0 – 10.5 |
Carbon (C) | ≤ 0.08 |
Manganese (Mn) | ≤ 2.00 |
Silicon (Si) | ≤ 1.00 |
Phosphorus (P) | ≤ 0.045 |
Sulfur (S) | ≤ 0.030 |
Iron (Fe) | Balance |
Property | Value (Typical) | Unit | Condition |
Tensile Strength (Ultimate) | ≥ 515 | MPa | Annealed |
Yield Strength (0.2% Offset) | ≥ 205 | MPa | Annealed |
Elongation (in 50 mm) | ≥ 40 | % | ASTM A370 |
Hardness (Brinell) | ≤ 201 | HB | |
Density | 7.93 | g/cm³ | Room Temperature |
Melting Range | 1400 – 1450 | °C | |
Modulus of Elasticity | ~193 | GPa | Room Temperature |
Category | Standard Code | Description |
Pipe | ASTM A312 / ASME SA312 | Seamless and welded austenitic stainless steel pipe |
Tube | ASTM A213 / ASME SA213 | Seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes |
Fittings | ASTM A403 / ASME SA403 | Wrought austenitic stainless steel piping fittings |
Flanges | ASTM A182 / ASME SA182 | Forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves |
