SA 240 TP 304H: Equivalent Materials and Grades

SA 240 TP 304H: Equivalent Materials and Grades

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium SA 240 TP 304H stainless steel plates compliant with ASME SA 240 and ASTM A240 standards. SA 240 TP 304H, also known as AISI 304H, UNS S30409, or 1.4948, is a high-carbon austenitic stainless steel optimized for high-temperature strength and creep resistance up to 1500°F (815°C). This guide details the equivalent materials and grades for SA 240 TP 304H, including international standards, chemical composition, mechanical properties, and applications for uses like plat stainless 304 and SA 240 GR 304 pipe. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet offerings.

Overview of SA 240 TP 304H Equivalent Materials

SA 240 TP 304His specified under ASME SA 240 for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels and high-temperature service. Equivalent materials are grades from other standards with similar chemical composition (high carbon 0.04-0.10%, 18-20% Cr, 8-10.5% Ni) and properties, ensuring global compatibility. These equivalents facilitate sourcing for applications like high-temperature piping and heat exchangers. Gangsteel’s sa240 gr 304h plates meet all equivalent standards.

Equivalent Grades for SA 240 TP 304H

The following table lists equivalent materials for SA 240 TP 304H across major international standards:

These equivalents ensure compatibility for global sourcing. For low-carbon variants, see sa240 gr 304l.

Chemical Composition of SA 240 TP 304H

The chemical composition of SA 240 TP 304H ensures high-temperature performance:

• Carbon: Higher (0.04-0.10%) than 304 (≤0.08%) and 304L (≤0.03%), boosting creep resistance.
• Chromium: Forms a passive oxide layer for corrosion resistance.
• Nickel: Ensures non-magnetic austenitic structure (SA 240 304 non magnetic).

For detailed specs, refer to our SS 304 data sheet.

Mechanical Properties of SA 240 TP 304H

The mechanical properties of SA 240 TP 304H for annealed plates (8-75 mm thick) support high-temperature use:

• High-Temperature Strength: Allowable stress of 25.5 ksi at 1000°F (538°C), superior to 304 (18.6 ksi).
• Comparison: Stronger than 304L (485 MPa tensile, 170 MPa yield).

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 240 TP 304H resists mild acids and atmospheric conditions, outperforming SS204 vs SS 304. Higher carbon risks sensitization in 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. See sa240 gr 321.

Applications of SA 240 TP 304H

SA 240 TP 304H is used in:

• Boilers and pressure vessels.
• Heat exchangers.
• Power generation piping.
• High-temperature chemical processing.

For cost-effective options, see sa240 gr 201.

Pricing and Availability

As of October 19, 2025, SA 240 TP 304H plate prices (2B finish, 3-6mm) range from $1.60-$3.50/kg. Gangsteel offers $1.60/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.

FAQ on SA 240 TP 304H Equivalent Materials

What is the equivalent of SA 240 TP 304H in ASTM?

ASTM A240 304H, identical to SA 240 TP 304H for high-temperature service.

What is the EN equivalent of SA 240 TP 304H?

EN 1.4948 (X6CrNi18-10), matching the high-carbon composition for creep resistance.

What is the JIS equivalent of SA 240 TP 304H?

JIS SUS 304H, used in Asia for piping and sheets with similar properties.

What is the GB equivalent of SA 240 TP 304H?

GB 06Cr19Ni10H, prevalent in Chinese manufacturing for high-temperature applications.

Why are equivalents important for SA 240 TP 304H?

They ensure global sourcing compatibility for high-temperature applications like boilers.