SA 182 304H: Forging Equivalent and Applications

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.

Overview of SA 182 304H Forging

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.

Chemical Composition

The chemical composition of SA 182 304H ensures high-temperature forging performance:

High carbon (0.04-0.10%) boosts creep resistance. See sa240 gr 304l for low-carbon variants.

Mechanical Properties

High strength at high temperatures (25.5 ksi allowable at 1000°F). See sa240 gr 304.

Physical Properties

• Density: 8.00 g/cm³.
• Melting Point: 1400-1450°C.
• Thermal Conductivity: 16.2 W/m·K.
• Coefficient of Thermal Expansion: 17.2 × 10⁻⁶/K.
• Max Service Temperature: 1500°F (815°C) continuous.

Corrosion Resistance

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.

Weldability

Fair with ER308H fillers; low heat input (<2.0 kJ/mm) and annealing required for forged components. See sa240 gr 321.

Applications of SA 182 304H Forging

SA 182 304H is used in:

• Forged flanges and fittings for high-temperature piping.
• Valve bodies and stems in boilers.
• Forged components in heat exchangers.
• High-temperature pressure vessel fittings.

For cost-effective options, see sa240 gr 201.

Pricing and Availability

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.

FAQ on SA 182 304H Forging Equivalents

What is the chemical equivalence between SA 182 304H and SA 240 GR 304H plate?

Identical: 0.04-0.10% C, 18-20% Cr, 8-10.5% Ni, ensuring high-temperature compatibility.

How do mechanical properties differ between SA 182 304H forging and SA 240 GR 304H plate?

They are the same: tensile strength 515 MPa (75 ksi), yield strength 205 MPa (30 ksi), elongation 30%.

What are the physical properties of SA 182 304H forging equivalent to SA 240 plate?

Density 8.00 g/cm³, melting point 1400-1450°C, max service temperature 1500°F (815°C) continuous.

What applications use SA 182 304H forging as equivalent to SA 240 GR 304H plate?

High-temperature flanges, fittings, and valve bodies in boilers, heat exchangers, and pressure vessels.

Why choose Gangsteel for SA 182 304H forging or SA 240 GR 304H plate?

Competitive pricing ($2.00/kg FOB for forging, $1.60/kg for plate), 600+ ton stock, custom fabrication, and full certifications.