A312 Tp347h Stainless Steel Pipe

ASTM A312 TP347H Stainless Steel Pipe is an austenitic stainless steel pipe containing niobium (Nb) as a stabilizing element. It not only prevents carbide precipitation during high temperature exposure, but also has a high carbon content that improves creep strength. It is suitable for high-temperature and high-pressure environments, such as petrochemical, thermal power plants, and aerospace fields.
Outer Diameter: 5mm-420mm (customizable)
Wall Thickness: 0.5mm-55mm (customizable)
Length: Can be customized upon request
Steel Grade: TP347H

Products Description

ASTM A312 TP347H Stainless Steel Pipe

Advantages of ASTM A312 TP347H Stainless Steel Pipe

Material Advantages: The stabilizing effect of niobium in TP347H prevents carbide precipitation, thereby reducing intergranular corrosion in steam circuits, making it suitable for boilers, superheaters, and reheaters.
Welding Advantages: TP347H's resistance to intergranular corrosion ensures strong and reliable process piping welds.
High Creep Strength Advantage: TP347H's high carbon content enhances the pipe's deformation resistance at high temperatures through solid solution strengthening and carbide precipitation.

applications of ASTM A312 TP347H Stainless Steel Pipe

Petrochemical and Refining Industries: Furnace tubes, reformer piping, and catalytic cracking units.
Chemical Processing: Reactors, heat exchangers, and piping systems for handling highly oxidizing chemicals.
Aerospace and Gas Turbines: Turbine casings and exhaust systems, high-temperature fuel and exhaust piping, etc.
Environmental Protection: Incinerators, flue gas cleaning systems, and waste heat recovery boilers.
Industrial Heating Equipment: Heat treatment furnace components, radiant tubes, and high-temperature conveyors.

Chemical Composition

Element	C	Mn	Si	P	S	Cr	Ni	Nb + Ta
TP347H (%)	0.04 – 0.10	≤ 2.00	≤ 0.75	≤ 0.045	≤ 0.030	17.0 – 19.0	9.0 – 13.0	≥ 10 × C (typically 0.8 – 1.20%)

Mechanical Properties

Property	Tensile Strength	Yield Strength	Elongation	Hardness
Value	≥ 515 MPa	≥ 205 MPa	≥ 35%	≤ 90 (HRB)

Possible Alternative Grades

304H – For moderate high-temperature service.
316H – Better chloride resistance, but lower creep strength than 347H.
321H – Titanium-stabilized, also good for high temperatures.
Incoloy 800H/HT – For very high temperature strength beyond stainless steels.

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Products Application

steeltube-applications

Products Package

stainless steel pipe package.jpg

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