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The following table summarizes typical allowable stress values for SA 240 GR 304 plates from ASME BPVC Section II, Part D, Table 1A (2023 edition, as of October 14, 2025). These values are for annealed condition and may vary slightly by edition; always consult the latest ASME code for your project.
Temperature (°F / °C) |
Allowable Stress (ksi) |
Allowable Stress (MPa) |
Notes |
---|---|---|---|
-20 to 100 / -29 to 38 |
20.0 |
138 |
Room temperature; based on YS/UTS |
200 / 93 |
20.0 |
138 |
Minimal derating |
300 / 149 |
20.0 |
138 |
|
400 / 204 |
20.0 |
138 |
|
500 / 260 |
20.0 |
138 |
|
600 / 316 |
20.0 |
138 |
|
700 / 371 |
20.0 |
138 |
|
800 / 427 |
20.0 |
138 |
|
900 / 482 |
20.0 |
138 |
|
1000 / 538 |
18.6 |
128 |
Start of derating |
1100 / 593 |
16.3 |
112 |
|
1200 / 649 |
13.7 |
94 |
|
1300 / 704 |
10.8 |
75 |
|
1400 / 760 |
7.7 |
53 |
|
1500 / 816 |
4.8 |
33 |
*Source: ASME BPVC Section II, Part D, Table 1A (ferrous materials for Division 1). Values are maximum allowable; for Division 2 or non-pressure applications, consult specific rules.
For SA 240 GR 304L, allowable stress is slightly lower at elevated temperatures (e.g., 14.9 ksi at 1000°F vs. 18.6 ksi for 304). For high-temperature applications, explore sa 240 gr 304h, which offers higher allowable stress (e.g., 25.5 ksi at 1000°F).
The allowable stress is derived from SA 240 GR 304’s mechanical properties (annealed, 8-75 mm thick):
Property |
Value (Minimum) |
Notes |
---|---|---|
Tensile Strength |
515 MPa (74.7 ksi) |
Basis for allowable stress |
Yield Strength (0.2% Offset) |
205 MPa (29.7 ksi) |
Stress at plastic deformation onset |
Elongation (A5, 50 mm) |
40% |
High ductility for forming |
Hardness (Brinell) |
≤ 201 HB |
Supports machinability |
The tensile strength (515 MPa) and yield strength (205 MPa) contribute to the allowable stress of 20.0 ksi at room temperature.
The allowable stress values guide designs for:
For harsher environments, explore sa 240 gr 317l or sa 240 gr 321 for high-temperature stability.
As of October 14, 2025, SA 240 GR 304 plate prices (2B finish, 3-6mm) range from $1.55-$3.50/kg globally, influenced by nickel prices (~$15,325/t). Gangsteel offers competitive pricing at $1.60/kg FOB (MOQ 1 ton) for sa 240 gr 304 plates, including custom sizes like plate 2 mm SUS 304, with finishes like 2B, No.1, and polished.
Gangsteel provides certified SA 240 GR 304 plates with compliant allowable stress values and competitive SS 304 plate price. Our inventory includes SA 240 TP 304/304L dual-certified plates for versatility and supports global delivery for applications from plat stainless 304 to heavy plates. For quotes or SA 240 TP 304 PDF specs, visit our astm a 240 stainless plate page or email admin@gangsteel.com.
Values based on ASME 2023 edition; verify with the latest code for your application.