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At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium SA240 SS 304H stainless steel plates compliant with ASME SA 240 and ASTM A240 standards. SA240 SS 304H, also known as AISI 304H, UNS S30409, or EN 1.4948, is a high-carbon austenitic stainless steel optimized for high-temperature strength and creep resistance up to 1500°F (815°C).
This material data sheet provides a complete overview of the properties and composition of SA240 SS 304H for applications like boilers, heat exchangers, and SA 240 GR 304 pipe. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet products.
The chemical composition of SA240 SS 304H ensures high-temperature performance and corrosion resistance:
Element |
Range (%) |
---|---|
Carbon (C) |
0.04 - 0.10 |
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 |
Mechanical properties for annealed plates (8-75 mm thick):
Property |
Value (Minimum) |
---|---|
Tensile Strength |
515 MPa (75 ksi) |
Yield Strength (0.2% Offset) |
205 MPa (30 ksi) |
Elongation (A5, 50 mm) |
40% |
Hardness (Brinell) |
≤ 201 HB |
Hardness (Rockwell B) |
≤ 92 HRB |
SA240 SS 304Hresists mild acids, freshwater, and atmospheric conditions, outperforming SS204 vs SS 304. Higher carbon risks sensitization in welds; anneal for protection. See sa240 gr 316l for chlorides.
Fair with ER308H fillers; low heat input (<2.0 kJ/mm) and post-weld annealing (1870-2050°F) required to avoid sensitization. See sa240 gr 304l for low-carbon variant.
SA240 SS 304His used in:
For cost-effective alternatives, see sa240 gr 201.
As of October 19, 2025, SA240 SS 304H plate prices (2B finish, 3-6mm) range from $1.60-$3.50/kg globally. Gangsteel offers $1.60/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.
8.00 g/cm³, supporting lightweight designs for high-temperature applications.
1400-1450°C, suitable for high-temperature processing and service.
16.2 W/m·K at 100°C, moderate for heat transfer in high-temperature applications.
17.2 × 10⁻⁶/K (20-100°C), stable for thermal expansion in high-heat environments.
Continuous up to 1500°F (815°C), with excellent creep resistance for boilers and heat exchangers.
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