What is the yield strength of ASTM A240 Type 304 plate?
If you're specifying materials for structural or industrial applications, understanding the yield strength of ASTM A240 Type 304 stainless steel plate is essential. This guide explains what yield strength means, the typical values for 304 stainless plates, and why ASTM A240 is widely used in fabrication and engineering.
Keywords Covered: ASTM A240 Type 304 plate, 304 stainless steel plate yield strength, UNS S30400 mechanical properties, 304 plate specifications
What is the ASTM A240 specification?
ASTM A240 is a standard specification for chromium and chromium-nickel stainless steel plates, sheets, and strips used for pressure vessels and general applications.
What Is ASTM A240 Type 304 plate?
Type 304, also known as UNS S30400, is an austenitic stainless steel with approximately 18% chromium and 8% nickel, offering excellent corrosion resistance, formability, and weldability.
304 plate specifications
Chemical Composition of ASTM A240 Type 304 Stainless Steel Plate
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
UNS S30400 mechanical properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2% offset) | ≥ 205 MPa (30 ksi) |
| Elongation (in 50mm) | ≥ 40% |
| Hardness (HRB) | ≤ 95 (Rockwell B) |
Physical Properties of ASTM A240 Type 304
| Property | Value |
|---|---|
| Density | 7.93 g/cm³ |
| Melting Point | 1400–1450°C (2550–2640°F) |
| Thermal Conductivity | 16.2 W/m·K at 100°C |
| Electrical Resistivity | 0.72 μΩ·m at 20°C |
| Modulus of Elasticity | ~193 GPa |
| Specific Heat Capacity | 500 J/kg·K at 0–100°C |
| Coefficient of Expansion | 17.2 µm/m·°C (20–100°C range) |
What is the yield strength of ASTM A240 annealed 304 stainless steel plate?
The yield strength of 304 stainless steel is 205 MPa (29,700 psi). Yield strength represents the maximum stress a material can endure while maintaining elastic deformation. This value may vary depending on factors such as heat treatment and specific manufacturing processes.
Is ASTM A240 the same as AISI 304?
No. AISI 304 refers to the material grade, while ASTM A240 refers to the standard governing plate and sheet production. A240 defines dimensions, tolerances, mechanical properties, and more.
Can ASTM A240 304 plate be used in high-temperature applications?
Yes. 304 plate performs well up to about 870°C (1600°F) in intermittent service, making it suitable for heat exchangers and boiler components.
What is the difference between ASTM A240 and A276?
The main difference between ASTM A240 and ASTM A276 lies in the product forms and intended applications they cover.
ASTM A240 applies to stainless steel plates, sheets, and strips, primarily used for pressure vessels and general fabrication. In contrast, ASTM A276 covers stainless steel bars and shapes, including round, square, hex, and flat bars, intended for structural, machining, and general-purpose applications. While both may specify similar stainless steel grades like Type 304 or 316, they differ in dimensional tolerances, surface finishes, and mechanical property requirements based on the product form.
GNEE – Reliable Supplier of ASTM A240 Type 304 Stainless Steel Plates
GNEE supplies ASTM A240 304 plates in a wide range of thicknesses and dimensions to meet your project needs:
Thickness: 0.5mm – 100mm
Widths: up to 2000mm
Lengths: up to 6000mm or custom cut
Finishes: 2B, No.1, No.4, BA, mirror-polished
Processing services: Shearing, plasma cutting, polishing, PVC film coating
Certifications: ASTM A240, EN 10204 3.1, ISO, SGS
With competitive pricing, fast global delivery, and OEM customization, GNEE is your trusted source for 304 stainless steel plates that meet international mechanical property standards.
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