Stainless Steel 304H UNS S30409 Pipes

UNS S30409 Pipes

S30409 stainless steel pipe is a high-temperature version of 304 stainless steel pipe, whose main components are chromium and nickel. Its high carbon content is beneficial to maintaining the material's stability and oxidation resistance in high-temperature environments. S30409 stainless heat-resistant steel pipe has similar corrosion resistance and weldability to 304 stainless steel, but has better mechanical properties at high temperatures.
S30409 stainless high-temperature steel pipe is suitable for equipment and components in high-temperature environments, such as stoves, furnace tubes, heating elements, high-temperature pipes, pressure vessels, etc. It is also widely used in chemical industry, petroleum, food processing, pharmaceuticals, medical equipment, construction and decoration and other fields.
In general, S30409 stainless steel round pipe is an excellent high-temperature stainless steel material with good corrosion resistance, weldability and high-temperature mechanical properties. It is suitable for applications in various high temperature environments.

Stainless Steel UNS S30409 Pipes Equivalent Grades

Chemical Composition

Mechanical property

Stainless Steel UNS S30409 Fabricated Pipes

Hardness testing:
For annealed stainless steel pipes with an inner diameter of more than 6.0 mm and a wall thickness of less than 13 mm, the W-B75 Webster hardness tester can be used. The test is very fast and simple, and is suitable for rapid and non-destructive qualification inspection of stainless steel pipes.
For stainless steel pipes with an inner diameter greater than 30mm and a wall thickness greater than 1.2mm, use a Rockwell hardness tester to test HRB and HRC hardness.
For stainless steel pipes with an inner diameter greater than 30mm and a wall thickness less than 1.2mm, use a surface Rockwell hardness tester to test the HRT or HRN hardness.
For stainless steel pipes with an inner diameter less than 0mm and greater than 4.8mm, use a special Rockwell hardness tester for pipes to test the HR15T hardness.
When the inner diameter of the stainless steel pipe is greater than 26mm, the hardness of the inner wall of the pipe can also be tested with a Rockwell or surface Rockwell hardness tester.

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