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Stainless Steel TP 304 Seamless Pipes, 304 SS Seamless Pipe, SS 304 Welded Pipes, 304L SS ERW Pipes, SS S30400 Pipe, SS UNS S30403 Welded Pipes, SUS 304 Seamless Pipe, SS 304L Welded Pipes Distributors, ASTM A312 304L SS Welded Pipe, AISI 304 Stainless Steel Seamless Pipes
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STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18-09 | X5CrNi18-10 |
SS 304L | 1.4306 / 1.4307 | S30403 | SUS 304L | 3304S11 | 03Х18Н11 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 |
SS 304H | 1.4301 | S30409 | SUS 304H | - | - | - | - |
Element | SS 304 | SS 304L | SS 304H |
C | 0.08 max | 0.035 max | 0.10 max |
Mn | 2 max | 2.0 max | 2.0 max |
Si | 0.75 max | 1.0 max | 0.75 max |
P | 0.045 max | 0.045 max | 0.045 max |
S | 0.030 max | 0.03 max | 0.03 max |
Cr | 18 – 20 | 18 – 20 | 18 – 20 |
Ni | 8 – 11 | 8 – 13 | 8 – 10.5 |
Element | SS 304 / 304L / 304H |
Density | 8.0 g/cm3 |
Melting Point | 1400 °C (2550 °F) |
Tensile Strength | Psi – 75000 , MPa – 515 |
Yield Strength (0.2%Offset) | Psi – 30000 , MPa – 205 |
Elongation | 35 % / 40% |
Food Processing Industry |
Fabrication Industry |
Oil and Gas Industry |
Chemical Industry |
Plumbing |
General Purpose Applications |
Heating |
Water Supply Systems |
Power Plant |
Paper & Pulp Industry |
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304L has 0.03% carbon for improved weldability, while 304H contains 0.04-0.1% carbon for higher strength at elevated temperatures, resisting oxidation up to 925°C.
The key difference between 304 and 304L stainless steel pipe is carbon content. 304L has a maximum of 0.03% carbon, making it more suitable for welding, while 304 has a higher carbon level, offering slightly better strength but less resistance to sensitization during welding.
304H pipe is a high-carbon version of 304 stainless steel, designed for applications requiring higher strength at elevated temperatures. Its increased carbon content provides enhanced strength, especially in high-temperature environments.
304 stainless steel is considered good quality due to its excellent corrosion resistance, formability, strength, and ease of maintenance. It is widely used and is the most ordered stainless steel grade globally. While 316 stainless steel offers better resistance to chlorides and acids, 304 is suitable for a broad range of applications, making it a popular choice.
Stainless steel 304L is a low-carbon, austenitic grade, enhancing weldability and deep drawing capabilities, making it ideal for heavy gauge components like sinks and saucepans.