Stainless Steel 304H Tubes | TP304H ASTM A249 SS 304H Tubing Supplier

Stainless Steel 304H Tubes: Manufacturer, Supplier & Exporter

Solitaire Overseas is a leading manufacturer of high quality 304H stainless steel tubes. Alloy 304H tubes can have extended toughness compared to that of ferritic stainless steels. Even the weakest SS 304H seamless tubes resist corrosion better than the most common stainless steel types. SS 304H welded tubes have unique features that set them apart from regular austenitic stainless steels. The strength of SS 304H ERW tubes may be almost two times higher than a traditional austenitic grade in some applications. SS 304H EFW tubes resist stress corrosion cracking. However, they are less resistant than ferritic stainless steels. SS Round 304H Tubes can be found to be less ductile and tough in low ambient temperatures, and this may affect their corrosion resistance as well.

The precipitation of SS Square 304H Tubes is determined by the chemical structure in the substance of the tubes and by other metallurgical factors. The rectangular stainless steel 304H tubes are more than 2 times stronger than the normal Type 304 austenitic steel. Thinner plates mean less weight. This is really helpful for storage tanks, pressure vessels, and structures like bridges. SS 304H Instrumentation Tubes have characteristics of both ferritic and austenitic stainless steel. Therefore, they are a flexible option for challenging industrial applications.

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What are Stainless Steel 304H Tubes?
Stainless Steel 304H Tubes Specifications
Chemical Composition of Stainless Steel 304H Tubes
Mechanical Properties of Stainless Steel 304H Tubes
Physical Properties of Stainless Steel 304H Tube
Equivalent Grades for Stainless Steel 304H Tubes
Stainless Steel 304H Tube Size Chart
Types of Stainless Steel 304H Tubes
Applications of Stainless Steel 304H Tubing
Why Choose US for Stainless Steel 304H Tubes
Related Products
FAQ’s About Stainless Steel 304H tubes

What are Stainless Steel 304H Tubes?

Stainless Steel 304H Tubes are a high-carbon variant of the standard 304 stainless steel. The "H" in its designation stands for "High carbon," with a carbon content ranging from 0.04% to 0.10%. This specific chemical composition is the key to its enhanced properties, particularly at elevated temperatures. The increased carbon content provides greater strength and improved creep resistance, which is the material's ability to resist deformation under prolonged exposure to high heat. This makes 304H stainless steel tube a superior choice for applications where operational temperatures consistently exceed 427°C (800°F).

Stainless Steel 304H Tubes Specifications

We manufacture our Stainless Steel 304H Tubes to meet precise specifications, ensuring they perform reliably across a variety of industrial applications. Our tubes are available in a range of sizes and schedules to suit different pressure and flow requirements.

Parameter	Details	Notes
Grade	SS 304H	Carbon content 0.04–0.10% for high-temperature strength.
Standards	ASTM A213 / ASTM A312	Designed for elevated temperature service in boilers & heat exchangers.
Outer Diameter (OD)	6.35 mm – 219.10 mm	Optimized for pressure and temperature-critical applications.
Wall Thickness (WT)	0.80 mm – 12.70 mm	Heavier walls available for higher pressure ratings.
Shapes	Round, Square, Rectangular	Round most common in thermal equipment.
Lengths	Up to 30 meters	Long lengths reduce weld joints in heat-intensive applications.

Chemical Composition of Stainless Steel 304H Tubes

The unique performance of Stainless Steel 304H Tubes is a direct result of its carefully controlled chemical composition, with the higher carbon content being the most critical factor for its high-temperature strength.

Element	Carbon (C)	Chromium (Cr)	Nickel (Ni)	Manganese (Mn)	Silicon (Si)	Phosphorus (P)	Sulfur (S)	Iron (Fe)
Content (%)	0.04 - 0.10	18.0 - 20.0	8.0 - 10.5	≤ 2.0	≤ 0.75	≤ 0.045	≤ 0.030	Balance

The high content of chromium and nickel is vital for forming the corrosion-resistant passive layer and for stabilizing the austenitic microstructure. This balance is critical for the performance of every 304 stainless steel tube.

Mechanical Properties of Stainless Steel 304H Tubes

The mechanical properties of SS 304H Tube are optimized for high-temperature service, providing excellent tensile and yield strength to maintain structural integrity under thermal stress.

Property	Value	Note
Tensile Strength	≥ 515 MPa	Retains strength at elevated temperatures.
Yield Strength	≥ 205 MPa	Provides stability under prolonged heat exposure.
Elongation	≥ 40%	Maintains flexibility despite high strength.
Hardness	≤ 92 HRB	Suitable for machining heat-resistant components.

Physical Properties of Stainless Steel 304H Tube

Understanding the physical properties of a Stainless Steel 304H Tube is crucial for its application in heat-intensive environments, as these properties directly influence its thermal and electrical performance.

Grade	Density (kg/m³)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (m/m/°C)	Thermal Conductivity (W/m.K)	Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
304H	8000	193	17.2	16.2	500	720

Equivalent Grades for Stainless Steel 304H Tubes

For seamless global procurement, it is important to know the equivalent grades of materials. This table provides a quick reference for Stainless Steel 304H across various international standards.

Standard	Designation
UNS No	S30409
Old British	304S31
EN / Euronorm	1.4948
Japanese JIS	SUS 304H

Stainless Steel 304H Tube Size Chart

We provide SS304H tubes in various sizes and wall thicknesses. These tubes offer excellent strength, corrosion resistance, and durability for high-temperature and industrial applications.

Wall Thickness (inches)	Available Outer Diameters (O.D.)
0.010	1/16", 1/8", 3/16"
0.012	1/8"
0.016	1/8", 3/16"
0.020	1/16", 1/8", 3/16", 1/4", 5/16", 3/8"
0.028	1/8", 3/16", 1/4", 5/16", 3/8", 1/2", 3/4", 1", 1 1/2", 2"
0.035	1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.049	3/16", 1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 1/2", 1 5/8", 2", 2 1/4"
0.065	1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 3/4", 2", 2 1/2", 3"
0.083	1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 1 5/8", 1 7/8", 2", 2 1/2", 3"
0.095	1/2", 5/8", 1", 1 1/4", 1 1/2", 2"
0.109	1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
0.120	1/2", 5/8", 3/4", 7/8", 1", 1 1/4", 1 1/2", 2", 2 1/4", 2 1/2", 3"
0.125	3/4", 1", 1 1/4", 1 1/2", 2", 3", 3 1/4"
0.134	1"
0.250	3"
0.375	3 1/2"

Types of Stainless Steel 304H Tubes

We provide various types of Stainless Steel 304H Tubes to suit different project needs. Our product range includes both seamless and welded options, each with specific advantages for different applications.

Tube Type	Description
Stainless Steel 304H Seamless Tube	Manufactured from a solid billet, these tubes have no welded seam, ensuring exceptional strength, durability, and uniformity. They are the preferred choice for critical, high-pressure, and high-temperature systems where leak integrity and material reliability are essential.
Stainless Steel 304H Welded Tube	Produced by rolling a flat strip of steel into a tubular shape and welding the seam, this method offers a cost-effective manufacturing solution. Welded tubes are ideal for lower-pressure applications where seamless construction is not required, providing a reliable and economical alternative.

Applications of Stainless Steel 304H Tubing

With its higher carbon content and enhanced creep strength, Stainless Steel 304H Tubes are specifically engineered for high-temperature, high-pressure service. They excel in equipment that experiences prolonged exposure to elevated heat levels.

Petrochemical Processing: Heat exchanger tubing in refinery distillation units and reformer systems.
Industrial Furnaces: Radiant tubes, furnace piping, and structural components exposed to extreme thermal cycling.
Steam Service : High-pressure steam pipelines and steam headers in industrial plants.
Oil & Gas Processing: Hot gas lines and processing units where heat and corrosive conditions exist simultaneously.

Why Choose US for Stainless Steel 304H Tubes

For applications where temperature, pressure, and time push materials to their limits, Solitaire Overseas delivers SS 304H tubes that excel in creep resistance and high-temperature durability. We cater to industries where operational safety and long service life are non-negotiable.

Heat-Resistant Engineering – Designed for continuous service above 500°C without losing strength.
Pressure-Grade Quality – Suitable for high-pressure steam and thermal systems.
Specialized Inventory – Seamless and welded tubes for power plants, refineries, and thermal processing units.
Expert Export Handling – Packaging and shipping designed to protect materials for long international transit.
Test-Certified – Supplied with full material test reports (MTR) and compliance certificates.

Get a Quote for Stainless Steel 304H Tubes

Fill out the form below or email sales@solitaire-overseas.com for a fast, no-obligation quote on any Stainless Steel 304H Tubes

FAQ’s About Stainless Steel 304H tubes

What are Stainless Steel 304H tubes?

Stainless Steel 304H tubes are high-carbon versions of standard 304 stainless steel, offering increased strength and excellent resistance to high-temperature environments. They are commonly used in applications such as heat exchangers, boilers, and pressure vessels.

What sizes are available for SS304H tubes?

304H stainless steel tubes are available in a wide range of sizes. The outer diameter ranges from 1/8" to 30", and wall thickness ranges from 0.35mm to 6.35mm. Tubes are available in various schedules, including SCH20, SCH30, SCH40, XS, SCH60, STD, SCH80, SCH120, SCH140, SCH160, and XXS. They are also available in round, square, rectangular, and hydraulic forms, with plain, beveled, or threaded ends.

What are the common applications of 304H stainless steel tubes?

304H tubes are widely used in industries that require high strength and resistance to heat and corrosion. Common applications include chemical processing, oil and gas refining, power generation, heat exchangers, condensers, pressure vessels, and boilers.

Can 304H stainless steel tubes be customized?

Yes, they can be customized in terms of size, wall thickness, shape, and end connections to meet specific engineering requirements.