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At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium AISI 304H stainless steel plates compliant with ASME SA 240 and ASTM A240 standards. AISI 304H stainless steel, also known as UNS S30409 or 1.4948, is a high-carbon variant of 304 designed for high-temperature applications. This guide explains the meaning of AISI 304H stainless steel and its equivalent grades across international standards. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet.
AISI 304H stainless steelis a high-carbon austenitic stainless steel (0.04-0.10% C) specified for elevated-temperature service, enhancing creep and rupture strength compared to standard 304 (≤0.08% C). The "H" denotes "high carbon," making it suitable for pressures vessels and boilers up to 1500°F (815°C). It retains the non-magnetic properties of 304 with a density of 8.00 g/cm³. See our sa240 gr 304h for stock.
AISI 304H stainless steelhas equivalents in various standards, facilitating global use:
|
Standard |
Equivalent Grade |
UNS Number |
Key Notes |
|---|---|---|---|
|
ASME |
SA 240 GR 304H |
S30409 |
For pressure vessels |
|
ASTM |
A240 304H |
S30409 |
General applications |
|
EN (Europe) |
1.4948 (X6CrNi18-10) |
S30409 |
High-temp service |
|
JIS (Japan) |
SUS 304H |
S30409 |
Industrial use |
|
GB (China) |
06Cr19Ni10H |
S30409 |
Common in Asia |
These equivalents match the composition and properties of AISI 304H stainless steel. For alternatives, see sa240 gr 304.
The composition of AISI 304H stainless steel supports high-temperature performance:
|
Element |
Range (%) |
|---|---|
|
Carbon (C) |
0.04 - 0.10 |
|
Chromium (Cr) |
18.00 - 20.00 |
|
Nickel (Ni) |
8.00 - 10.50 |
|
Iron (Fe) |
Balance |
Higher carbon boosts strength at heat. Chromium ensures corrosion resistance. For details, see sa240 gr 304l.
AISI 304H stainless steeloffers robust properties for annealed plates:
|
Property |
Value (Min) |
|---|---|
|
Tensile Strength |
515 MPa (75 ksi) |
|
Yield Strength |
205 MPa (30 ksi) |
|
Elongation |
40% |
|
Hardness (Brinell) |
≤ 201 HB |
It excels in creep resistance above 800°F. See sa240 gr 304h.
AISI 304H stainless steelis used in:
For milder uses, explore sa240 gr 304.
As of October 19, 2025, AISI 304H stainless steel plate prices range from $1.60-$3.50/kg. Gangsteel offers $1.60/kg FOB (MOQ 1 ton). Contact admin@gangsteel.com.
Gangsteel delivers certified AISI 304H stainless steel with competitive rates. Our 600+ ton inventory supports global delivery. Visit astm a 240 stainless plate for more.
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