sa 240 304 properties and equivalent

SA 240 GR 304 Properties and Equivalent Materials

 

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium SA 240 GR 304 stainless steel plates compliant with ASME SA 240 and ASTM A240 standards.

SA 240 GR 304, also known as AISI 304, UNS S30400, or 1.4301, is a versatile austenitic stainless steel renowned for its corrosion resistance, formability, and SA 240 304 non magnetic properties. This article details the properties (chemical, mechanical, and physical) of SA 240 GR 304, its equivalent materials across international standards, and applications for uses like plat stainless 304 and SA 240 GR 304 pipe. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA 240 stainless steel plate offerings.

 

Properties of SA 240 GR 304

Chemical Composition

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

Element	Range (%)
Carbon (C)	0.00 - 0.08
Manganese (Mn)	0.00 - 2.00
Silicon (Si)	0.00 - 0.75
Phosphorus (P)	0.00 - 0.045
Sulfur (S)	0.00 - 0.030
Chromium (Cr)	18.00 - 20.00
Nickel (Ni)	8.00 - 10.50
Nitrogen (N)	0.00 - 0.10
Iron (Fe)	Balance

• 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 GR 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 (Annealed, 8-75 mm thick)

The mechanical properties support structural and forming applications:

Property	Value (Minimum)	Notes
Tensile Strength	515 MPa (74.7 ksi)	Strength before fracture
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
Hardness (Rockwell B)	≤ 92 HRB	Alternative hardness metric

Cold-working can increase tensile strength (up to 900 MPa) but reduces ductility.

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 GR 304 ideal for plat SS 304 3mm and plate 2 mm SUS 304.

Corrosion Resistance

SA 240 GR 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 GR 316L, which contains molybdenum. See sa 240 gr 316l.

 

Weldability

• Good weldability with ER308 or ER308L fillers, but SA 240 GR 304L is preferred for critical welds to avoid sensitization.
• For high-temperature applications, explore sa 240 gr 304h or sa 240 gr 321.

 

Equivalent Materials for SA 240 GR 304

SA 240 GR 304 has equivalents in various international standards, ensuring global compatibility:

Standard	Equivalent Grade	UNS Number	Key Characteristics
ASME SA 240 (USA)	SA 240 GR 304	S30400	Corrosion resistance, non-magnetic, food-grade
ASTM A240 (USA)	AISI 304	S30400	Identical to SA 240 GR 304, used in North America
EN (Europe)	1.4301 (X5CrNi18-10)	S30400	Matches 304’s composition, common in Europe
JIS (Japan)	SUS304	S30400	Used in Asia for plates, pipes, and sheets
GB (China)	06Cr19Ni10	S30400	Matches 304’s properties, prevalent in China
ISO	X5CrNi18-10	S30400	Global standard for 304 equivalent

Gangsteel’s sa 240 gr 304 plates meet these equivalent standards.

 

Applications of SA 240 GR 304

SA 240 GR 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.
• Medical Devices: Non-magnetic instruments leveraging SA 240 304 non magnetic properties.

For chloride-heavy environments, consider sa 240 gr 317l.

 

Pricing and Availability at Gangsteel

As of October 15, 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 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. For pricing details, contact admin@gangsteel.com.

 

Why Choose Gangsteel?

Gangsteel provides certified SA 240 GR 304 plates with consistent properties and competitive SS 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, visit our astm a 240 stainless plate page or email admin@gangsteel.com.