A240 304H Plate Equivalent to SA 240

A240 304H: Plate Equivalent to SA 240

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply high-quality A240 304H stainless steel plate compliant with ASTM A240 and ASME SA 240 standards. A240 304H stainless steel plate, also known as SA 240 GR 304H or AISI 304H, is a high-carbon austenitic stainless steel optimized for high-temperature service up to 1500°F (815°C). This guide explains the equivalence between ASTM A240 304H and ASME SA 240 GR 304H, including specifications, 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.

Equivalence Between A240 304H and SA 240 GR 304H

A240 304Hand SA 240 GR 304H are technically identical, with ASME SA 240 being the direct adoption of ASTM A240 for use in the ASME Boiler and Pressure Vessel Code (BPVC). Both cover chromium and chromium-nickel stainless steel plates, sheets, and strips for pressure vessels and general corrosive service. The equivalence means:

• Technical Requirements: Identical chemical composition, mechanical properties, and testing (e.g., tensile, hardness).
• Differences: ASME SA 240 adds BPVC certification, traceability, and additional testing (e.g., impact, bend) for pressure vessel compliance, while ASTM A240 is for general applications.
• Interchangeability: A240 304H can be used in ASME applications if certified under SA 240, but SA 240 is mandatory for BPVC-coded vessels.

Gangsteel's sa240 gr 304h plates meet both standards.

Chemical Composition

The chemical composition of A240 304H (equivalent to ASME SA 240 GR 304H) is:

• Carbon: High (0.04-0.10%) for creep resistance, higher than 304 (≤0.08%) and 304L (≤0.03%).
• Chromium/Nickel: Ensure corrosion resistance and non-magnetic properties (SA 240 304 non magnetic).

Mechanical Properties

• High-temperature strength: Allowable stress 25.5 ksi at 1000°F (538°C).

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

A240 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 A240 304H

A240 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, A240 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 A240 GR 304H Equivalents

What is the ASME equivalent of A240 GR 304H?

ASME SA 240 GR 304H, identical for BPVC pressure vessels.

What is the EN equivalent of A240 GR 304H?

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

What is the JIS equivalent of A240 GR 304H?

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

What is the GB equivalent of A240 GR 304H?

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

Why are equivalents important for A240 GR 304H?

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