sa 240 material specification

 

 

What is the SA 240 Material Specification?

ASME SA 240 (aligned with ASTM A240) is a standard specification for chromium and chromium-nickel stainless steel plates, sheets, and strips used in pressure vessels, boilers, and general corrosive service. It defines requirements for chemical composition, mechanical properties, physical properties, and testing to ensure material performance.

The specification includes austenitic, ferritic, martensitic, and duplex stainless steel grades, such as SA 240 GR 304, SA 240 GR 316L, and SA 240 Type 2205, covering a wide range of applications like plat stainless 304 and SA 240 GR 304 pipe. Gangsteel’s sa 240 gr 304 plates are certified to meet these standards.

 

Common Grades in SA 240 Specification

SA 240 includes various stainless steel grades, categorized by microstructure. Below is a table of selected grades, their UNS numbers, and key characteristics:

Grade	UNS Number	Type	Key Characteristics
SA 240 GR 304	S30400	Austenitic	Excellent corrosion resistance, SA 240 304 non magnetic, food-grade, good weldability
SA 240 GR 304L	S30403	Austenitic	Low-carbon 304, superior weldability, ideal for chemical and food industries
SA 240 GR 316	S31600	Austenitic	Molybdenum-enhanced for better pitting resistance in chloride environments
SA 240 GR 316L	S31603	Austenitic	Low-carbon 316, excellent for welded applications in marine and chemical settings
SA 240 GR 321	S32100	Austenitic	Titanium-stabilized for high-temperature resistance, used in heat exchangers
SA 240 GR 304H	S30409	Austenitic	Higher carbon for elevated-temperature strength, used in boilers
SA 240 GR 317L	S31703	Austenitic	High molybdenum for superior corrosion resistance in aggressive environments
SA 240 GR 410	S41000	Martensitic	High strength, moderate corrosion resistance, used in cutlery and valves
SA 240 GR 430	S43000	Ferritic	Good corrosion resistance, magnetic, used in automotive trim and appliances
SA 240 Type 2205	S32205/S31803	Duplex	High strength and corrosion resistance, ideal for oil and gas applications

For a full range, explore our sa 240 gr 304l, sa 240 gr 316l, sa 240 gr 317l, and sa 240 type 2205.

 

Properties of SA 240 GR 304 (Representative Grade)

SA 240 GR 304 is a widely used grade, serving as a benchmark for SA 240 material properties.

Chemical Composition

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: Ensures corrosion resistance via a passive oxide layer.
• Nickel: Enhances ductility and SA 240 304 non magnetic properties.
• Carbon: Limited to ≤0.08% for weldability, though SA 240 GR 304L is preferred for critical welds.

 

Mechanical Properties (Annealed, 8-75 mm thick)

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

Physical Properties

• Density: 8.00 g/cm³ (SA 240 GR 304 density).
• Melting Point: ~1400-1450°C.
• Thermal Conductivity: 16.2 W/m·K.
• Coefficient of Thermal Expansion: 17.2 × 10⁻⁶/K.
• Electrical Resistivity: 0.72 × 10⁻⁶ Ω·m.

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

 

Corrosion Resistance and Weldability

SA 240 GR 304 offers excellent corrosion resistance in:

• Atmospheric conditions, freshwater, and mild acids (food-grade).
• General environments, outperforming SS204 vs SS 304.

It’s less resistant to chloride pitting compared to SA 240 GR 316L. Weldability is good with ER308 fillers, but SA 240 GR 304L is preferred for welded applications. For chloride-heavy environments, explore sa 240 gr 316l.

 

Applications of SA 240 Stainless Steel

SA 240 grades like 304, 316L, and 321 are used in:

• Food Processing: Tanks and plat stainless 304 for hygiene.
• Chemical Industry: Vessels and SA 240 GR 304 pipe.
• Architecture: Structural panels like plate 2 mm SUS 304.
• Oil and Gas: Duplex grades like SA 240 Type 2205 for high strength.

For high-temperature needs, see sa 240 gr 304h or sa 240 gr 321.

 

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. Gangsteel offers competitive pricing at $1.60/kg FOB (MOQ 1 ton) for sa 240 gr 304 plates.

 

Why Choose Gangsteel?

Gangsteel provides certified SA 240 plates with competitive SA 240 304 plate price, including custom sizes like plat SS 304 3mm. For quotes or to learn what is SA 304, visit our astm a 240 stainless plate page or email admin@gangsteel.com.