sa240 304 allowable stress

Allowable Stress Table for SA 240 GR 304

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.

*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).

Factors Affecting Allowable Stress

• Temperature: No significant derating up to 900°F; sharp decline above 1000°F due to creep effects.
• Material Form: Values apply to plates (SA 240); for pipes (SA 312 TP 304) or tubes (SA 249 TP 304), confirm per respective specs.
• Code Division: Division 1 uses conservative values; Division 2 may allow higher stresses (e.g., up to 2/3 UTS).
• Enhanced Values: ASME Note G5 permits higher stresses (e.g., 25 ksi at RT) based on 1% proof stress, but requires engineering judgment.
• Comparison: Higher than SA 240 GR 304L at elevated temperatures; lower than duplex grades like SA 240 Type 2205 (~30 ksi at RT). For chloride environments, consider sa 240 gr 316l.

Mechanical Properties Context

The allowable stress is derived from SA 240 GR 304’s mechanical properties (annealed, 8-75 mm thick):

The tensile strength (515 MPa) and yield strength (205 MPa) contribute to the allowable stress of 20.0 ksi at room temperature.

Applications Using SA 240 GR 304 Allowable Stress

The allowable stress values guide designs for:

• Pressure Vessels: ASME Section VIII calculations for plat SS 304 3mm or thicker plates.
• Heat Exchangers: Safe operation up to 1000°F with 18.6 ksi limit.
• Piping: SA 240 GR 304 pipe under ASME B31.3, using these stress values.
• Food/Chemical: Structural components leveraging SA 240 304 non magnetic properties and corrosion resistance.

For harsher environments, explore sa 240 gr 317l or sa 240 gr 321 for high-temperature stability.

Pricing and Availability

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.

Why Choose Gangsteel?

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.