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At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium 304H stainless steel plates compliant with ASME SA 240 and ASTM A240 standards. 304H stainless steel, also known as AISI 304H, UNS S30409, or EN 1.4948, is a high-carbon austenitic stainless steel optimized for high-temperature strength and creep resistance up to 1500°F (815°C). Gangsteel focuses on the density value of 304H stainless steel and compares it with other stainless steel grades, highlighting its significance for applications like boilers, heat exchangers, and SA 240 GR 304 pipe. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet offerings.
The density of 304H stainless steel is 8.00 g/cm³ (0.289 lb/in³), as specified by ASME SA 240 and ASTM A240 standards. This value reflects the material’s mass per unit volume and is consistent across the 304-series grades due to their similar chemical compositions. The density is critical for:
For detailed specifications, refer to our SS 304 data sheet.
The density of 304H stainless steel is compared below with other common grades to highlight similarities and differences:
Grade |
Density (g/cm³) |
Notes |
---|---|---|
304H (SA 240 GR 304H) |
8.00 |
Identical to 304/304L due to similar Cr-Ni composition; high-temperature use. See sa240 gr 304h. |
304 (SA 240 GR 304) |
8.00 |
Same as 304H; general-purpose grade. See sa240 gr 304. |
304L (SA 240 GR 304L) |
8.00 |
Low-carbon variant; identical density. See sa240 gr 304l. |
316L (SA 240 GR 316L) |
8.00 |
Molybdenum addition; same density. See sa240 gr 316l. |
201 (SA 240 GR 201) |
7.93 |
Slightly lower due to higher manganese, lower nickel. See sa240 gr 201. |
430 (SA 240 GR 430) |
7.74 |
Ferritic; lower density due to minimal nickel. See sa240 gr 430. |
904L (SA 240 GR 904L) |
8.05 |
Slightly higher due to high nickel/molybdenum. See sa240 gr 904l. |
The consistent 8.00 g/cm³ density of 304H stainless steel makes it interchangeable with 304/304L for weight calculations but superior for high-temperature applications.
The density of 304H stainless steel is driven by its chemical composition:
Element |
Range (%) |
Role |
---|---|---|
Carbon (C) |
0.04 - 0.10 |
Enhances creep strength; negligible impact on density. |
Chromium (Cr) |
18.00 - 20.00 |
Provides corrosion resistance; contributes to stable density. |
Nickel (Ni) |
8.00 - 10.50 |
Ensures non-magnetic austenitic structure (SA 240 304 non magnetic). |
Manganese (Mn) |
0.00 - 2.00 |
Minor influence on density; stabilizes structure. |
Silicon (Si) |
0.00 - 0.75 |
Enhances scaling resistance; minimal density impact. |
Phosphorus (P) |
0.00 - 0.045 |
Controlled for weldability; negligible density effect. |
Sulfur (S) |
0.00 - 0.030 |
Limited for corrosion resistance; no density impact. |
Nitrogen (N) |
0.00 - 0.10 |
Strengthens alloy; minimal density effect. |
Iron (Fe) |
Balance |
Primary contributor to 8.00 g/cm³ density. |
The high iron content and balanced Cr-Ni alloying result in the 8.00 g/cm³ density, consistent with other 304-series grades. For comparison with lower-density grades, see sa240 gr 201.
The density supports robust mechanical properties for annealed plates (8-75 mm thick):
Property |
Value (Minimum) |
Notes |
---|---|---|
Tensile Strength |
515 MPa (75 ksi) |
Stronger than 304L (485 MPa) |
Yield Strength (0.2% Offset) |
205 MPa (30 ksi) |
Better deformation resistance than 304L |
Elongation (A5, 50 mm) |
40% |
High ductility for forming |
Hardness (Brinell) |
≤ 201 HB |
Supports machinability |
The 8.00 g/cm³ density ensures lightweight yet strong designs, with high-temperature creep resistance (25.5 ksi at 1000°F) compared to sa240 gr 304l.
These properties complement the density for high-heat applications, unlike ferritic grades like sa240 gr 430.
304H stainless steeloffers excellent corrosion resistance in:
Higher carbon (0.04-0.10%) increases sensitization risk in weld zones (797°F-1580°F), requiring annealing. For chloride-heavy environments, see sa240 gr 317l.
Weldability is fair using ER308H fillers. Higher carbon risks sensitization, necessitating low heat input (<2.0 kJ/mm) or post-weld annealing (1870-2100°F). For better weldability, see sa240 gr 321.
The 8.00 g/cm³ density supports:
For cost-effective alternatives, see sa240 gr 202.
As of October 19, 2025, 304H stainless steel plate prices (2B finish, 3-6mm) range from $1.60-$3.50/kg. Gangsteel offers $1.60/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.
The density is 8.00 g/cm³ (0.289 lb/in³), identical to 304 and 304L, ideal for lightweight designs in high-temperature applications.
Both 304H and 316L have a density of 8.00 g/cm³ due to similar Cr-Ni compositions, ensuring consistent weight calculations.
The similar chromium (18-20%) and nickel (8-10.5%) content results in a consistent 8.00 g/cm³ density across the 304 series.
304H (8.00 g/cm³) is denser than 430 (7.74 g/cm³) due to 430’s ferritic structure and minimal nickel, making 430 lighter but less corrosion-resistant.
The 8.00 g/cm³ density supports lightweight, durable designs in boilers, heat exchangers, and piping, balancing strength and weight.
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