STAINLESS STEEL 304H
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Overview
304H stainless steel can be regarded as a higher carbon version of 304 widely used for high-temperature services, if 304L is seen as the lower carbon version of 304. Specifically, the carbon content of type 304H is controlled at 0.04%~0.10% for increased strength at temperatures between 427°C and up to 800°C. However, 304H stainless steel will become sensitized under temperatures of 425-860°C. This can weaken its aqueous corrosion resistance though not an issue for high temperature applications. Hence, it is not suggested to use 304H under such applications where subsequent aqueous corrosion resistance is required for a work temperature of 425-860°C. Type 304H is superior to 304L in long-term and short term creep strength at temperatures above 500°C. It also exhibits better sensitization resistance than 304L. Due to its good heat resistance, type 304H is commonly used in ASME pressure vessels under operation temperatures above 525°C.
Features of Stainless Steel 304H
Stainless steel 304H features similar corrosion resistance to that of 304/304L, though 304L may have the slowest corrosion rate among the three. In most cases, their resistance to corrosion in oxidizing environments, reducing environments and aggressive organic acids such as acetic are uniformly good when the concentration is low to moderate. However, due to high carbon content, 304H stainless steel is apt to get sensitized and incur intergranular corrosion at welds and heat affected zones. In such cases, post-annealing can be applied to restore its corrosion resistance.
Type 304H is quite ductile, readily welded and easily formed. Due to its higher strength at elevated temperatures, 304H stainless steel is widely used for structural and pressure containing applications in the temperature range of 500-800°C.
Density: 7.93g/cm3
Stainless Steel 304H Applications
- 1) Petroleum Refining
- 2) Gas and Chemical Industry
- 3) Pressure Vessels
- 4) Industrial Boilers
- 5) Heat Exchangers
- 6) Condensers
- 7) Pipelines
- 8) Steam Exhausts
- 9) Power Generation Industry
- 10) Cooling Towers
- 11) Fertilizer and Chemical Plants
Applicable Standards: ASTM A240/A240M, ASTM A213/A213M, ASTM A312/A312M, ASTM A580/A580M, ASTM A313/A313M, ASTM A479/A479M, ASTM A959
Contact 304H Stainless Steel Producer
At HEXION STEEL, 304H stainless steel pipes tubes (seamless & welded), 304H stainless steel wires, 304H stainless steel bars (round, square, hex, flat), 304H stainless steel plates and 304H stainless steel strips can be produced as per your specific demands. Dimension, finish, and mechanical properties are all customizable. Plus, HEXION STEEL also stock famous brands 304H stainless steel coils, 304H stainless steel sheets plates for your diverse and fast-shipment options. If you have any demand for 304H stainless steel materials, don’t hesitate to contact HEXION STEEL. Consultation is free here!
Chemical Composition
Data Sheet
| ASTM / AISI | DIN | JIS | GB |
|---|---|---|---|
| 304H | 1.4948 | SUS304H | 07Cr19Ni10 |