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Grade | C | SI | Mn | Cr | Ni | S | P |
304 | ≤ 0.08 | ≤1.00 | ≤2.00 | 18.00-20.00 | 8.00-11.00 | ≤0.03 | ≤0.045 |
304L | ≤0.035 | ≤1.00 | ≤2.00 | 18.00-20.00 | 8.00-13.00 | ≤0.03 | ≤0.045 |
304H | 0.04-0.10 | ≤1.00 | ≤2.00 | 18.00-20.00 | 8.00-11.00 | ≤0.03 | ≤0.045 |
Material | Tensile Strength ksi(MPa) | Yield Strength ksi(MPa) | Elongation (%) | Hardness Brinell/Vickers | Hardness Rockwell |
304 | ≥75(515) | ≥30(205) | ≥ 35 | ≤192HBW/200HV | ≤90HRB |
304L | ≥70(485) | ≥25(170) | ≥ 35 | ≤192HBW/200HV | ≤90HRB |
304H | ≥75(515) | ≥30(205) | ≥ 35 | ≤192HBW/200HV | ≤90HRB |
304H seamless stainless steel pipes are widely used in various industries ranging from food processing to automotive engineering. These pipes are extremely corrosion resistant and can withstand high temperatures and pressures. This makes them ideal for handling chemicals, fuels, and other liquids. 304H seamless stainless steel pipes are a popular choice for a wide range of applications around the world due to their beauty and durability.
Food Processing:
Grade 304H seamless pipes are often used in food processing due to their high sanitation standards and corrosion resistance. These pipes transport food products such as milk, beer, and juice. The smooth surface of the pipes prevents the growth of bacteria and other microorganisms.
Chemical Processing:
In chemical production, seamless 304H pipes transport chemicals and acids at high temperatures and pressures. These pipes have strong corrosion resistance, making them ideal for handling corrosive chemicals.
Oil and Gas Industry:
The oil and gas industry relies heavily on seamless 304H stainless steel pipes due to their high resistance to corrosion and heat. These pipes transport oil and gas at high temperatures and pressures and are resistant to cracking and leaking.
Architectural Applications:
Seamless 304H stainless steel pipes are ideal for architectural applications such as handrails and railings due to their aesthetics. These pipes are extremely corrosion resistant and can withstand harsh weather conditions, making them particularly suitable for outdoor installations.
Pharmaceutical Industry:
The pharmaceutical industry has high requirements for hygiene and cleanliness. Seamless pipes made from SS 304H are used in the production of pharmaceutical products such as vaccines and medicines. These pipes are highly resistant to corrosion and are therefore suitable for handling chemicals during the manufacturing process.
Marine Applications:
Seamless pipes made from stainless steel 304H are extremely corrosion resistant, making them ideal for use in the marine industry. These pipes are used to transport water, oil, and other liquids on ships and offshore installations. They can withstand extreme weather conditions and seawater without rusting or corroding.
Automotive Industry:
The automotive industry has strict requirements for the materials used in its manufacturing process. Seamless 304H stainless steel pipes are often used in the manufacture of exhaust systems due to their corrosion resistance. These pipes are also used in fuel lines and brake lines in cars and trucks.
End of Pipe and Tube
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Marking
Supplier / Manufacturer Name or Custom Logo - on request
Specification
Material Grade
Nominal Size
Schedule or Wall Thickness
Method of Manufacturing (Seamless or Welded)
Heat Number
Marked Pipe Sample: XTD ASTM A312 TP304H SEAMLESS 42.2x 3.56*6000MM HEAT NO. 2023121205A15
Packing
Ply Wooden Boxes
PE Fabric Bundles
Standard seaworthy export packing
Plastic Bags, or as required
Delivery Condition
Pickled&Annealed, Polished, Bright Annealed.
All tubes shall be supplied as per applicable ASTM B163 /B426
Mill test certificates will be issued
We can provide 3.2 Certification according to the needs of you
Standard
ASTM A312: Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
ASTM A213: Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
Each shipment of our 304 seamless stainless steel pipe is carefully packaged using industry standard methods such as plywood boxes and PE fabric bales to ensure safe transportation. Whether you need seamless 304 stainless steel pipe for critical applications or standard use, our rigorous marking and certification process ensures consistent quality and traceability.
The stainless steel alloys AISI 304 and AISI 304L are the best known and most widely used chromium-nickel steels. Due to their excellent corrosion resistance, high strength and low carbon content, these austenitic steels are particularly suitable for welding applications. They are seamless tubes made from 304 stainless steel and can therefore meet a wide range of industrial requirements.
304, 304H, and 304L all have the same nominal chromium and nickel content, and therefore have the same corrosion resistance, ease of processing, and weldability. The difference between 304, 304H, and 304L is the carbon content, which is >0.03, >0.05, and <0.03, respectively. 304H (UNS S30409) has a carbon content limited to 0.04–0.10%, which ensures optimal high-temperature strength. 304L (UNS 30403) has a carbon content limited to a maximum of 0.03%, which prevents sensitization during welding. 304 (UNS 30400) has a carbon content limited to a maximum of 0.08%. Therefore, 304 is not suitable for corrosive applications that require welding, such as: B. Tanks and pipes with corrosive solutions. Therefore, 304L is preferred. Since the carbon content is not at least 100%, 304H is not suitable for high temperature applications where optimum strength is required. Therefore, 304H is preferred. As a result, 304 is usually limited to bars made into parts that do not require welding, or thin sheets made into items that do not require welding, such as kitchen sinks or cookware.
Carbon content has a significant effect on room temperature strength. Therefore, the specified minimum tensile strength of 304L is 5 kpsi (34 MPa) less than that of 304 (515 MPa). However, nitrogen also has a significant effect on room temperature strength. Adding a small amount of nitrogen can produce 304L with the same tensile strength as 304. Therefore, almost all 304L is manufactured as dual certified 304/304L. This means that it meets the minimum carbon content of 304L while meeting the minimum tensile strength of 304.
