what is sa 240 tp 304 meaning

What is the Meaning of SA 240 TP 304?

SA 240 TP 304refers to a specific grade of austenitic stainless steel specified under ASME SA-240/SA-240M, a standard published by the American Society of Mechanical Engineers (ASME) for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels, boilers, and general corrosive service. The designation breaks down as follows:

• SA: Indicates an ASME-adopted specification, aligned with ASTM A240/A240M, part of the ASME Boiler and Pressure Vessel Code (BPVC) Section II, Part A (Ferrous Material Specifications).
• 240: Refers to the specific ASME standard number for stainless steel plates, sheets, and strips.
• TP: Stands for "Type," used in ASME to denote the specific stainless steel grade (aligned with AISI designations).
• 304: Identifies the grade, a chromium-nickel austenitic stainless steel (UNS S30400, EN 1.4301) with 18-20% chromium and 8-10.5% nickel, known for its excellent corrosion resistance and non-magnetic properties in the annealed state.

SA 240 TP 304 is equivalent to SA 240 GR 304, AISI 304, SUS304 (JIS), and 06Cr19Ni10 (GB), with a density of 8.00 g/cm³. It’s ideal for applications like plat stainless 304, plate 2 mm SUS 304, and food processing equipment. Gangsteel’s sa 240 gr 304 plates meet these standards.

Chemical Composition of SA 240 TP 304

The chemical composition of SA 240 TP 304 ensures excellent corrosion resistance and formability:

• Chromium: Forms a passive oxide layer for corrosion resistance.
• Nickel: Enhances ductility and SA 240 304 non magnetic properties.
• Carbon: Limited to ≤0.08% for weldability, though SA 240 TP 304L (≤0.03%) is preferred for critical welds. See sa 240 gr 304l.

For detailed specifications, refer to our SS 304 data sheet.

Mechanical Properties of SA 240 TP 304

The mechanical properties of SA 240 TP 304 for annealed plates (8-75 mm thick) support structural and forming applications:

Cold-working can increase tensile strength (up to 900 MPa) but reduces ductility. For high-temperature applications, explore sa 240 gr 304h.

Physical Properties

• Density: 8.00 g/cm³, ideal for lightweight designs (e.g., a 1m x 1m x 3mm plate weighs ~24 kg).
• Melting Point: ~1400-1450°C, suitable for processing.
• Thermal Conductivity: 16.2 W/m·K, moderate for heat transfer.
• Coefficient of Thermal Expansion: 17.2 × 10⁻⁶/K, stable across temperatures.
• Electrical Resistivity: 0.72 × 10⁻⁶ Ω·m, good for non-conductive applications.

These properties make SA 240 TP 304 suitable for plat SS 304 3mm and plate 2 mm SUS 304.

Corrosion Resistance and Weldability

SA 240 TP 304 offers excellent corrosion resistance in:

• Atmospheric conditions, freshwater, and mild acids (food-grade applications).
• General environments, outperforming SS204 vs SS 304 due to higher nickel content.

It is less resistant to chloride-induced pitting compared to SA 240 TP 316L, which contains molybdenum. Weldability is good using ER308 or ER308L fillers, but SA 240 TP 304L is preferred for critical welds to minimize sensitization risks. For chloride-heavy environments, explore sa 240 gr 316l.

Applications of SA 240 TP 304

SA 240 TP 304 is used in:

• Food Processing: Tanks, conveyors, and equipment (hygienic, non-tarnishing).
• Chemical Industry: Vessels and SA 240 GR 304 pipe for mild corrosives.
• Architecture: Structural and decorative panels like plat stainless 304.
• Automotive: Components requiring corrosion resistance and formability.
• Medical Devices: Non-magnetic instruments leveraging SA 240 304 non magnetic properties.

For harsher corrosive environments, consider sa 240 gr 317l. For high-temperature applications, explore sa 240 gr 321 for titanium-stabilized performance.

Pricing and Availability at Gangsteel

As of October 15, 2025, SA 240 TP 304 plate prices for 2B finish (3-6mm thick) range from $1.55-$3.50/kg globally, influenced by nickel prices (~$15,325/t). Gangsteel offers competitive pricing starting at $1.60/kg FOB (MOQ 1 ton) for standard sizes (e.g., 4’x8’, 5’x10’) and custom cuts like plate 2 mm SUS 304, with finishes like 2B, No.1, and polished. Our SS 304 plate price is 5-10% below market averages, and dual-certified SA 240 TP 304/304L plates are available for flexibility. For pricing details, contact admin@gangsteel.com.

Why Choose Gangsteel?

Gangsteel provides certified SA 240 TP 304 plates with consistent properties and competitive SA 240 304 plate price. Our 600+ ton inventory supports global delivery for applications from plat stainless 304 to heavy plates. For quotes or to learn more about SA 240 TP 304, visit our astm a 240 stainless plate page or email admin@gangsteel.com.