Key Feature

The Universal Corrosion-Resistant Piping Solution. Excellent all-around performance for fluid transport across industries, combining corrosion resistance, strength, and hygiene.

The standard inventory item for stainless steel piping systems worldwide.

Common Designations

UNS S30400, AISI 304
ASTM A312 (Seamless/Welded Pipe)ASTM A358 (EFW Pipe)
EN 1.4301, X5CrNi18-10
JIS SUS304

ASTM A312 is the primary specification for pressure pipe applications.

Chemical Composition (Typical wt.%)

C: ≤ 0.08
Cr: 18.0 - 20.0
Ni: 8.0 - 10.5
Mn: ≤ 2.00
Si: ≤ 0.75
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

Excellent ductility for bending and forming operations during installation.

Physical Properties

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

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

Pressure Ratings

Schedule 5S: Light wall
Schedule 10S: Standard light
Schedule 40S: Standard
Schedule 80S: Extra strong
Per ASME B36.19 dimensions

Available in full range of schedules to meet various pressure 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 A312: Seamless and Welded Austenitic Pipe
ASTM A358: Electric-Fusion-Welded Pipe
ASTM A269: Seamless and Welded Tubing
ASME B36.19: Stainless Steel Pipe Dimensions
EN 10216-5: Seamless Tubes for Pressure Purposes

Comprehensive standardization ensures quality and interchangeability.

Common Applications

• Food & Beverage: Process piping, brewery lines, dairy systems
• Chemical Processing: Process lines, reagent transport, exhaust systems
• Pharmaceutical: Process piping, WFI systems, clean utilities
• Architectural: Handrails, structural elements, decorative features
• Oil & Gas: Instrumentation lines, utility piping, non-corrosive services
• Power Generation: Feedwater lines, condenser tubes, instrument tubing
• Water Treatment: Potable water systems, filtration piping, chemical feed lines

Universally applicable across industrial, commercial, and residential sectors.