Key Feature

The Universal Corrosion-Resistant Bar Stock. Excellent all-around performance for machining, fabrication, and structural applications across industries.

The standard inventory item for stainless steel bar stock worldwide.

Common Designations

UNS S30400, AISI 304
ASTM A276 (Stainless Steel Bars)
ASTM A479 (Stainless Steel Bars for Pressure Vessels)
EN 1.4301, X5CrNi18-10
JIS SUS304

ASTM A276 is the primary specification for general bar applications.

Chemical Composition (Typical wt.%)

C: ≤ 0.08
Cr: 18.0 - 20.0
Ni: 8.0 - 10.5
Mn: ≤ 2.00
Si: ≤ 1.00
P: ≤ 0.045
S: ≤ 0.030

The classic "18/8" chemistry ensures corrosion resistance and austenitic stability.

Mechanical Properties

Tensile Strength: ≥ 515 MPa
Yield Strength: ≥ 205 MPa
Elongation: ≥ 40%
Hardness: ≤ 201 HB
Machinability: 45% of B1112 steel

Excellent combination of strength and ductility for machining and forming.

Physical Properties

Density: 7.93 g/cm³
Melting Range: 1399 - 1454 °C
Thermal Expansion: 17.2 × 10⁻⁶/K (20-100°C)
Thermal Conductivity: 16.2 W/m·K (100°C)
Non-magnetic when annealed

Standard properties for calculations involving weight, thermal expansion, etc.

Available Forms

Rounds: 3mm - 600mm diameter
Squares: 3mm - 300mm
Hexagons: 3mm - 100mm
Flats: Various thicknesses and widths
Special Shapes: Angles, channels, custom profiles

Comprehensive size range for all manufacturing needs.

Surface Conditions

Hot Finished: Mill scale, black surface
Cold Finished: Smooth, bright surface
Centerless Ground: Precision dimensions
Polished: Mirror or satin finishes
Peeled/Turned: Improved surface quality

Various surface finishes for different application requirements.

Corrosion Resistance

Excellent resistance to: Atmospheric corrosion, fresh water, food products, many organic and inorganic chemicals, oxidizing acids.

Suitable for most environments except highly chloride-containing conditions.

Temperature Limits

Continuous Service: Up to 870°C
Intermittent Service: Up to 925°C
Cryogenic Service: Excellent down to -196°C

Maintains properties across extreme temperature ranges.

Key Standards

ASTM A276: Stainless Steel Bars
ASTM A479: Bars for Pressure Vessels
ASTM A484: General Requirements
EN 10088-3: Stainless Steel Bars
JIS G4303: Stainless Steel Bars
ASME SA479: Code Construction

Comprehensive standardization ensures quality and interchangeability.

Common Applications

• Machined Components: Shafts, valves, fittings, fasteners, precision parts
• Food Processing Equipment: Cutlery, utensils, machine parts, conveyors
• Architectural: Fasteners, structural components, decorative elements
• Chemical Processing: Valve bodies, pump components, agitators
• Medical Devices: Surgical instruments, implant components, equipment
• Automotive: Trim, exhaust components, fasteners, decorative parts
• Marine: Fasteners, fittings, hardware (non-submerged)

Universally applicable across industrial, commercial, and consumer sectors.