Key Feature

The Titanium-Stabilized High-Temperature Corrosion-Resistant Bar Stock. Superior high-temperature strength and oxidation resistance with guaranteed protection against sensitization in welded and high-temperature service.

The benchmark material for machined components requiring both welding integrity and continuous high-temperature performance.

Common Designations

UNS S32100
AISI 321
ASTM A276 (Stainless Steel Bars)
ASTM A479 (Bars for Pressure Vessels)
EN 1.4541, X6CrNiTi18-10
JIS SUS321

EN 1.4541 is the primary European designation for titanium-stabilized grades.

Chemical Composition (Typical wt.%)

C: ≤ 0.08
Cr: 17.0 - 19.0
Ni: 9.0 - 12.0
Ti: ≥ 5×C (typically 0.40-0.70%)Mn: ≤ 2.00
Si: ≤ 0.75

Titanium content (minimum 5× carbon) ensures complete stabilization against sensitization.

Mechanical Properties

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

Maintains strength better than 304 at elevated temperatures.

High-Temperature Properties

Continuous Service: Up to 900°C
Intermittent Service: Up to 925°C
Oxidation Resistance: Excellent up to 870°C
Creep Strength: Better than 304/304L

Superior to both 304 and 304L in high-temperature applications.

Physical Properties

Density: 7.90 g/cm³
Melting Range: 1400 - 1450 °C
Thermal Expansion: 17.2 × 10⁻⁶/K (20-100°C)
Thermal Conductivity: 16.3 W/m·K (100°C)
Non-magnetic when annealed

Slightly lower thermal expansion than 304, beneficial for thermal cycling.

Corrosion Resistance

Excellent general corrosion resistance similar to 304. Superior resistance to intergranular corrosion after exposure to sensitizing temperatures (425-850°C).

Specifically designed to prevent weld decay in high-temperature corrosive environments.

Machining Characteristics

• Similar machinability to 304• Titanium carbides can be abrasive
• Good surface finish achievable
• Proper tool selection important

Titanium carbides may increase tool wear compared to 304.

Welding Characteristics

Excellent weldability with all standard methods
No Post-Weld Annealing required
Ti Stabilization prevents sensitization in HAZ
Suitable for Heavy Sections

Titanium provides stabilization during welding and subsequent high-temperature service.

Available Forms

Rounds: 6mm - 300mm diameter
Squares: 6mm - 150mm
Hexagons: 6mm - 100mm
Flats: Various sizes
Billets: For forging applications
Forgings: Custom forged parts

Full range of bar stock forms and sizes available.

Key Standards

ASTM A276 321: Stainless Steel Bars
ASTM A479 321: Bars for Pressure Vessels
ASTM A484: General Requirements
EN 10088-3: Stainless Steel Bars
JIS G4303: Stainless Steel Bars
ASME SA479: Code Construction
AMS 5510 (Aerospace)

Comprehensive standardization for quality assurance.

Common Applications

• Aerospace Components: Jet engine parts, afterburner components, aircraft exhaust systems
• Automotive Parts: Exhaust manifolds, turbocharger housings, emission system components
• Heat Treatment Fixtures: Baskets, trays, fixtures, hangers
• Chemical Processing: High-temperature reactor parts, agitator shafts, valve components
• Power Generation: Turbine components, boiler parts, high-temperature fasteners
• Industrial Heating: Furnace parts, radiant tubes, burner components
• Food Processing: High-temperature processing equipment, sterilization system parts

Specifically designed for high-temperature and thermally cycled applications.