AISI 304H Equivalent EN, JIS, and GB Standards

AISI 304H Equivalent: EN, JIS, and GB Standards

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply high-quality AISI 304H stainless steel plates compliant with ASME SA 240 and ASTM A240 standards. AISI 304H, also known as 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 equivalents of AISI 304H in EN, JIS, and GB standards, including a table and textual description, for applications 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 AISI 304H Equivalents

AISI 304His a high-carbon (0.04-0.10%) variant of 304 stainless steel specified under ASME SA 240 GR 304H for pressure vessels and high-temperature service. Its equivalents in international standards share the same composition and properties, ensuring global compatibility for high-temperature applications like boilers and heat exchangers. Equivalents are based on UNS S30409, with minor variations in testing or certification. Gangsteel’s sa240 gr 304h plates meet all equivalent standards.

Equivalent Grades Table for AISI 304H

The following table lists equivalents for AISI 304H in EN, JIS, and GB standards:

These equivalents ensure seamless integration in global projects. For low-carbon variants, see sa240 gr 304l.

Detailed Description of AISI 304H Equivalents

EN 1.4948 (X6CrNi18-10) (Europe): The European standard equivalent, denoted as X6CrNi18-10, reflects ~18% chromium and 10% nickel with high carbon (0.04-0.10%). It aligns with AISI 304H's mechanical properties (515 MPa tensile strength, 205 MPa yield strength) and is used in EU industries for high-temperature pressure vessels and piping, complying with EN 10088 for chemical composition and EN 10028 for pressure equipment.

JIS SUS 304H (Japan): The Japanese Industrial Standards equivalent, SUS 304H, matches AISI 304H's composition and high-temperature creep resistance. It is commonly used in Asian manufacturing for seamless pipes, sheets, and structural components, with identical standards for tensile strength and elongation (40% min). SUS 304H is specified under JIS G 4304 for sheets and JIS G 3459 for pipes, ensuring compatibility for high-temperature applications.

GB 06Cr19Ni10H (China): The Chinese national standard equivalent, GB 06Cr19Ni10H, denotes ~19% chromium and 10% nickel with high carbon (0.04-0.10%). It is widely used in Chinese industries for boilers, heat exchangers, and high-temperature vessels, with mechanical properties equivalent to AISI 304H (515 MPa tensile, 205 MPa yield). This grade complies with GB/T 20878 for high-temperature stainless steels, making it prevalent for domestic manufacturing.

These equivalents facilitate international sourcing, with minor variations in testing or certification. For detailed specs, refer to our SS 304 data sheet.

Chemical Composition of SA 240 GR 304H

The chemical composition of SA 240 GR 304H (AISI 304H) ensures high-temperature performance across equivalents:

• Carbon: High (0.04-0.10%) for creep resistance.
• Chromium: Ensures corrosion resistance.
• Nickel: Maintains non-magnetic austenitic structure (SA 240 304 non magnetic).

Mechanical Properties

• High-Temperature Strength: Allowable stress of 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

SA 240 GR 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

SA 240 GR 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 GR 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 GR 304H Equivalents

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

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

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

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

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

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

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

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

Why are equivalents important for SA 240 GR 304H?

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