a240 gr 304H Stainless Steel Flanges: Types and Pressure Rat

A240 Type 304H Stainless Steel Tubing: Dimensions and Temperature Limits

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply high-quality A240 type 304H stainless steel tubing compliant with ASTM A240 and ASME SA 240 standards. A240 type 304H stainless steel tubing, 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). While A240 specifies plates, sheets, and strips, the material is used in tubing fabrication under SA 213 TP 304H or A213 TP 304H for seamless or welded tubing. This guide details the dimensions and temperature limits of A240 type 304H stainless steel tubing. Contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet.

Overview of A240 Type 304H Stainless Steel Tubing

A240 type 304H stainless steel tubing is designed 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 tubing. Non-magnetic with a density of 8.00 g/cm³, it’s perfect for demanding environments like power generation. For tubing-specific standards, use SA 213 TP 304H; A240 focuses on base material for tubing fabrication. See sa240 gr 304h.

Chemical Composition

The composition of A240 type 304H stainless steel tubing 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.

Dimensions of A240 type 304H Stainless Steel Tubing

A240 type 304H stainless steel tubingdimensions are based on SA 213 TP 304H for seamless tubing:

• Outer Diameter (OD): 6.35mm - 127mm (1/4" - 5").
• Wall Thickness (WT): 0.5mm - 12.7mm (Sch 5S - Sch 80S).
• Length: Up to 6m or custom; standard 6m or 12m for welded.
• Tolerance: OD ±0.4% for OD <114.3mm; WT ±12.5%.
• Surface Finish: Annealed and pickled; bright annealed optional.

For plates used in tubing fabrication, see sa240 gr 304h.

Temperature Limits

• Continuous Service: Up to 1500°F (815°C) with excellent creep resistance.
• Intermittent Service: Up to 1600°F (871°C).
• Scaling Onset: ~1200°F (649°C).
• Sensitization Range: Avoid 797°F-1580°F (425°C-860°C) during welding.

See sa240 gr 321 for stabilized alternatives.

Corrosion Resistance

A240 304H stainless steel tubing 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 304l.

Applications of A240 tp 304H Stainless Steel Tubing

A240 tp 304H stainless steel tubing 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.

Pricing and Availability

As of October 19, 2025, A240 tp 304H stainless steel tubing 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 tp 304H Stainless Steel Tubing

What is the maximum service temperature for A240 tp 304H stainless steel tubing?

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

What are the mechanical properties of A240 tp 304H stainless steel tubing?

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

How does A240 tp 304H stainless steel tubing compare to 304L?

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

What applications use A240 tp 304H stainless steel tubing?

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

Why choose A240 tp 304H stainless steel tubing?

Superior creep resistance and corrosion in high-temperature environments at competitive pricing.