a240 304H Seamless Pipe Advantages and Suppliers

A240 304H Seamless Pipe: Advantages and Suppliers

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium A240 304H seamless pipe compliant with ASTM A240 and ASME SA 240 standards. A240 304H seamless pipe, 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 details the advantages, specifications, and suppliers of A240 304H seamless pipe for applications like boilers, heat exchangers, and high-temperature piping. Contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet offerings.

Overview of A240 304H Seamless Pipe

A240 304H seamless pipe is specified for chromium and chromium-nickel stainless steel products used in pressure vessels and high-temperature service. With 0.04-0.10% carbon, it enhances creep and rupture strength compared to standard 304 or 304L seamless pipe. Non-magnetic with a density of 8.00 g/cm³, it’s ideal for demanding environments. For seamless pipe standards, use SA 213 TP 304H or A213 TP 304H; A240 focuses on base material for pipe fabrication. See sa240 gr 304h.

Chemical Composition

The composition of A240 304H seamless pipe ensures high-temperature performance:

Higher carbon improves 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.

Advantages of A240 304H Seamless Pipe

A240 304H seamless pipe offers:

• Creep Resistance: High carbon (0.04-0.10%) ensures strength up to 1500°F.
• Seamless Construction: No welds, reducing leak risks in high-pressure systems.
• Corrosion Resistance: Resists mild acids and atmospheric conditions, outperforming SS204 vs SS 304.
• Non-Magnetic: SA 240 304 non magnetic properties for sensitive applications.
• Formability: 40% elongation supports bending for complex piping.

Compared to welded pipe, seamless A240 304H reduces fabrication time. See sa240 gr 316l for chloride resistance.

Specifications

• Standards: ASTM A240 for plates; SA 213 TP 304H for seamless tubing.
• Dimensions: OD 6.35-127mm (1/4"-5"); WT 0.5-12.7mm (Sch 5S-80S); length up to 6m.
• Tolerance: OD ±0.4%; WT ±12.5%.
• Surface Finish: Annealed and pickled; bright annealed optional.

Weldability

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

Applications

A240 304H seamless pipe is used in:

• Boilers and pressure vessels (seamless tubes).
• Heat exchangers (high-temperature tubing).
• Power generation piping.
• Chemical processing lines.

For cost-effective options, see sa240 gr 201.

Suppliers of A240 304H Seamless Pipe

Pricing and Availability

As of October 19, 2025, A240 304H seamless pipe prices (Sch 10S, 1-4" OD) range from $1.80-$4.00/kg. Gangsteel offers $1.80/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.

FAQ on A240 304H Seamless Pipe

What is the maximum service temperature for A240 304H seamless pipe?

Continuous up to 1500°F (815°C), with high creep resistance for high-temperature piping.

What are the mechanical properties of A240 304H seamless pipe?

Tensile strength 515 MPa (75 ksi), yield strength 205 MPa (30 ksi), elongation 40%.

How does A240 304H seamless pipe compare to 304L?

304H has higher carbon for heat strength; 304L is better for weldability. See sa240 gr 304l.

What applications use A240 304H seamless pipe?

Boilers, heat exchangers, power generation piping, and high-temperature chemical processing.

Why choose A240 304H seamless pipe?

Seamless construction reduces leak risks, with superior creep resistance and corrosion in high-temperature environments.