ASTM 304H 1.4948 EN Equivalent and Properties

ASTM 304H (EN 1.4948): Equivalents and Properties

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium ASTM 304H stainless steel plates compliant with ASTM A240 and ASME SA 240 standards, equivalent to EN 1.4948. ASTM 304H, also known as AISI 304H, UNS S30409, or EN 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 EN 1.4948 equivalent to ASTM 304H, including properties, specifications, 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.

EN 1.4948 Equivalent to ASTM 304H

EN 1.4948(X6CrNi18-10) is the European standard equivalent to ASTM 304H, matching its high-carbon composition (0.04-0.10% C, 18-20% Cr, 8-10.5% Ni) and high-temperature creep resistance. The "1.4948" denotes a heat-resistant austenitic stainless steel, while "X6CrNi18-10" indicates ~18% Cr and 10% Ni. Both standards ensure identical mechanical properties (515 MPa tensile strength, 205 MPa yield strength) and are interchangeable for pressure vessels and high-temperature service. EN 1.4948 complies with EN 10088 for chemical composition and EN 10028 for pressure equipment. For low-carbon variants, see sa240 gr 304l.

Chemical Composition

The chemical composition of ASTM 304H (EN 1.4948) 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: 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

ASTM 304H (EN 1.4948) 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

ASTM 304H (EN 1.4948) 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 ASTM 304H (EN 1.4948) Equivalents

What is the ASME equivalent of ASTM A240 304H (EN 1.4948)?

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

What is the JIS equivalent of ASTM A240 304H (EN 1.4948)?

JIS SUS 304H, matching the high-carbon composition for high-temperature use.

What is the GB equivalent of ASTM A240 304H (EN 1.4948)?

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

How does EN 1.4948 compare to ASTM A240 304H in chemical composition?

Identical: 0.04-0.10% C, 18-20% Cr, 8-10.5% Ni, ensuring creep resistance and corrosion performance.

Why are equivalents important for ASTM A240 304H (EN 1.4948)?

They enable global sourcing for high-temperature applications like boilers, ensuring compatibility.