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At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply high-quality SA 182 304H forged stainless steel fittings, flanges, and valves compliant with ASME SA 182 and ASTM A182 standards. SA 182 304H, also known as AISI 304H, UNS S30409, or EN 1.4948, is a high-carbon austenitic stainless steel optimized for high-temperature forging applications up to 1500°F (815°C). This guide details the forging equivalents and applications of SA 182 304H, including chemical composition, mechanical properties, and physical properties. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 stainless steel plate offerings.
SA 182 304H is a forging specification for stainless steel fittings, flanges, valves, and parts for high-temperature service. It is the forging equivalent to SA 240 GR 304H plates, sharing the high-carbon (0.04-0.10%) composition for enhanced creep and rupture strength. Non-magnetic with a density of 8.00 g/cm³, SA 182 304H is forged at 1800-2200°F (982-1204°C) for components like flanges and elbows in boilers and heat exchangers. For sheet/plate equivalents, see sa240 gr 304h.
The chemical composition of SA 182 304H ensures high-temperature forging performance:
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 |
High carbon (0.04-0.10%) boosts creep resistance. See sa240 gr 304l for low-carbon variants.
Property |
Value (Min) |
---|---|
Tensile Strength |
515 MPa (75 ksi) |
Yield Strength |
205 MPa (30 ksi) |
Elongation |
30% |
Hardness (Brinell) |
≤ 201 HB |
High strength at high temperatures (25.5 ksi allowable at 1000°F). See sa240 gr 304.
SA 182 304H resists mild acids and atmospheric conditions, outperforming SS204 vs SS 304. Higher carbon risks sensitization in forged welds; anneal for protection. See sa240 gr 316l for chlorides.
Fair with ER308H fillers; low heat input (<2.0 kJ/mm) and annealing required for forged components. See sa240 gr 321.
SA 182 304H is used in:
For cost-effective options, see sa240 gr 201.
As of October 19, 2025, SA 182 304H forged components prices (flanges, fittings) range from $2.00-$5.00/kg. Gangsteel offers $2.00/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit ASTM A240 stainless steel plate.
Identical: 0.04-0.10% C, 18-20% Cr, 8-10.5% Ni, ensuring high-temperature compatibility.
They are the same: tensile strength 515 MPa (75 ksi), yield strength 205 MPa (30 ksi), elongation 30%.
Density 8.00 g/cm³, melting point 1400-1450°C, max service temperature 1500°F (815°C) continuous.
High-temperature flanges, fittings, and valve bodies in boilers, heat exchangers, and pressure vessels.
Competitive pricing ($2.00/kg FOB for forging, $1.60/kg for plate), 600+ ton stock, custom fabrication, and full certifications.
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