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ASTM A312 TP 304L Seamless Stainless Steel Pipe

ASTM A312 TP 304L Seamless Stainless Steel Pipe is a low carbon austenitic stainless steel pipe widely used in industrial fields that require high corrosion resistance and good mechanical properties.

Excellent corrosion resistance: The chromium element in TP 304L stainless steel can form a dense oxide film, which effectively prevents oxidation and corrosion, especially in environments containing chloride ions.
Good processing performance: The material is easy to weld, cut and form, and is suitable for various complex processing techniques.
High strength and toughness: The manufacturing process of seamless steel pipes gives it high strength and toughness, and can withstand high pressure and impact.
Wide range of applications: Due to its excellent performance and moderate price, TP 304L seamless stainless steel pipes are widely used in many industries such as food processing, chemical, petroleum, and pharmaceuticals.

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ASTM A312 TP 304L Seamless Stainless Steel Pipe Description

ASTM A312 TP 304L Seamless Stainless Steel Pipe is a high-quality, corrosion-resistant seamless stainless steel pipe widely used in multiple industrial fields. ASTM A312 TP 304L stainless steel, which is a low-carbon, high-chromium-nickel content stainless steel with excellent corrosion resistance and good processing properties. Conforms to the ASTM A312 standard, which specifies the manufacturing and testing requirements for seamless and welded austenitic stainless steel pipes.
The dimensions and tolerances of ASTM A312 TP 304L seamless stainless steel pipes meet the requirements of ASTM standards. Common sizes include:
Outside Diameter: From 1/8 inch to 12 inches
Wall Thickness: Depending on the required pressure rating and pipe diameter, the wall thickness ranges from standard thickness to extra thickness
Length: Usually single random length (SRL, 16-25 feet) or double random length (DRL, 35-40 feet), can also be customized according to customer requirements

ASTM A312 TP 304L Seamless Stainless Steel Pipe Technical

The chemical composition of ASTM A312 TP 304L stainless steel is as follows:
Carbon (C): maximum content is 0.03%
Manganese (Mn): maximum content is 2.00%
Phosphorus (P): maximum content is 0.045%
Sulfur (S): maximum content is 0.030%
Silicon (Si): maximum content is 0.75%
Nickel (Ni): 8.0%-12.0%
Chromium (Cr): 18.0%-20.0%
The low carbon content (≤0.03%) makes 304L have better resistance to intergranular corrosion after welding.
The mechanical properties of ASTM A312 TP 304L seamless stainless steel pipe are as follows:
Minimum yield strength: 25,000 psi (about 170 MPa)
Minimum tensile strength: 70,000 psi (about 485 MPa)
Elongation: more than 35%
Hardness: Brinell hardness (HBW) up to 201, Rockwell hardness (HRB) up to 92, Vickers hardness (HV) up to 210
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ASTM A312 TP 304L Seamless Stainless Steel Pipe Applications

ASTM A312 TP 304L seamless stainless steel pipes are widely used in the following fields:
Chemical and petrochemical industries: for conveying corrosive chemicals
Oil and gas industries: for use in environments containing sulfides and chlorides
Food and beverage industries: for processing and conveying food and beverages
Pharmaceutical industries: for conveying fluids in sterile and clean environments
Marine engineering: for equipment that resists seawater corrosion
Nuclear and power industries: for conveying fluids in high temperature and high pressure environments

ASTM A312 TP 304L Seamless Stainless Steel Pipe Manufacturing Process and Heat Treatment

ASTM A312 TP 304L seamless stainless steel pipe adopts seamless manufacturing process, manufactured by hot rolling or cold rolling method without welds. This manufacturing process ensures the overall strength and pressure resistance of the steel pipe, suitable for applications in high pressure and corrosive environments.
ASTM A312 TP 304L seamless stainless steel pipe is usually solution treated to ensure the best corrosion resistance and mechanical properties:
Solution treatment: The steel is heated to 1040-1120°C and then cooled rapidly to maintain the austenite structure and improve the toughness and corrosion resistance of the material.

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