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ASTM A240 304 is an austenitic stainless steel specified under ASTM A240/A240M for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels and general applications. Equivalent to ASME SA 240 GR 304, UNS S30400, and 1.4301, it’s valued for its SA 240 GR 304 density of 8.00 g/cm³ and SA 240 304 non magnetic properties in the annealed state.
ASTM A240 304 is ideal for applications like plat stainless 304, SA 240 GR 304 pipe, and structural components. Gangsteel’s sa 240 gr 304 plates ensure compliance and quality.
The chemical composition of ASTM A240 304 ensures excellent corrosion resistance and formability:
Element |
Range (%) |
---|---|
Carbon (C) |
0.00 - 0.08 |
Manganese (Mn) |
0.00 - 2.00 |
Silicon (Si) |
0.00 - 0.75 |
Phosphorus (P) |
0.00 - 0.045 |
Sulfur (S) |
0.00 - 0.030 |
Chromium (Cr) |
18.00 - 20.00 |
Nickel (Ni) |
8.00 - 10.50 |
Nitrogen (N) |
0.00 - 0.10 |
Iron (Fe) |
Balance |
For detailed specifications, refer to our SS 304 data sheet.
The mechanical properties of ASTM A240 304 for annealed plates (8-75 mm thick) support structural and forming applications:
Property |
Value (Minimum) |
Notes |
---|---|---|
Tensile Strength |
515 MPa (74.7 ksi) |
Strength before fracture |
Yield Strength (0.2% Offset) |
205 MPa (29.7 ksi) |
Stress at plastic deformation onset |
Elongation (A5, 50 mm) |
40% |
High ductility for forming |
Hardness (Brinell) |
≤ 201 HB |
Supports machinability |
Hardness (Rockwell B) |
≤ 92 HRB |
Alternative hardness metric |
Cold-working can increase tensile strength (up to 900 MPa) but reduces ductility. For high-temperature applications, explore sa 240 gr 304h.
These properties support applications like plat SS 304 3mm and plate 2 mm SUS 304.
ASTM A240 304 offers excellent corrosion resistance in:
It’s less resistant to chloride-induced pitting compared to ASTM A240 316L. Weldability is good with ER308 or ER308L fillers, but ASTM A240 304L is preferred for critical welds to avoid sensitization. For chloride-heavy environments, explore sa 240 gr 316l.
ASTM A240 304 is used in:
For harsher conditions, consider sa 240 gr 317l or sa 240 gr 321 for high-temperature stability.
As of October 14, 2025, ASTM A240 304 plate prices for 2B finish (3-6mm thick) range from $1.55-$3.50/kg globally, influenced by nickel prices (~$15,325/t). Gangsteel offers competitive pricing starting at $1.60/kg FOB (MOQ 1 ton) for standard sizes (e.g., 4’x8’, 5’x10’) and custom cuts like plate 2 mm SUS 304, with finishes like 2B, No.1, and polished. Our SS 304 plate price is 5-10% below market averages, and dual-certified SA 240 TP 304/304L plates are available for flexibility.
Gangsteel provides certified ASTM A240 304 (SA 240 GR 304) plates with consistent properties and competitive SA 240 304 plate price. Our 600+ ton inventory supports global delivery for applications from plat stainless 304 to heavy plates. For quotes or to learn what is SA 304, visit our astm a 240 stainless plate page or email admin@gangsteel.com.