Key Feature

The Enhanced Titanium-Stabilized Ferritic Stainless Steel Bar Stock. Improved corrosion resistance over 430 with titanium stabilization for better weldability and intergranular corrosion resistance.

An upgraded 430-grade bar with better overall performance while maintaining cost-effectiveness.

Common Designations

UNS S43035
AISI 439
ASTM A276 (Stainless Steel Bars)
EN 1.4510, X3CrTi17
JIS SUS439LX
GM 439M

Often specified in automotive and appliance industry standards for bar applications.

Chemical Composition (Typical wt.%)

C: ≤ 0.07
Cr: 16.0 - 19.0
Ti: 0.50 - 1.00Mn: ≤ 1.00
Si: ≤ 1.00
Ni: ≤ 0.50
P: ≤ 0.040
S: ≤ 0.030

Titanium content (typically 0.5-1.0%) provides stabilization and improved properties for bar applications.

Mechanical Properties

Tensile Strength: ≥ 415 MPa
Yield Strength: ≥ 240 MPa
Elongation: ≥ 20%
Hardness: ≤ 183 HB
Machinability: 65% of B1112 steel

Similar mechanical properties to 430 but with better corrosion resistance.

Physical Properties

Density: 7.70 g/cm³
Melting Range: 1425 - 1510 °C
Thermal Expansion: 10.8 × 10⁻⁶/K (20-400°C)
Thermal Conductivity: 25.0 W/m·K (100°C)
Strongly magnetic

Low thermal expansion similar to carbon steel; beneficial for thermal cycling.

Available Forms

Rounds: 6mm - 150mm diameter
Squares: 6mm - 75mm
Hexagons: 6mm - 50mm
Flats: Various sizes
Angles: Structural angles
Wire: For specific applications

Commonly supplied in sizes suitable for automotive and appliance manufacturing.

Surface Conditions

Hot Rolled: Black bar
Cold Drawn: Bright finish
Centerless Ground: Precision ground
Polished: For decorative applications
Peeled: Improved surface for machining

Various surface finishes available for different application requirements.

Corrosion Resistance

Good resistance to atmospheric corrosion, nitric acid, organic acids, and fresh water. Better than 430, approaching 304 in many environments.

Suitable for automotive exhaust, appliance, and architectural bar applications.

Machining Characteristics

• Good machinability for ferritic grade
• Better than austenitic grades in some aspects
• Good chip control• Moderate tool wear• Surface finish achievable

Titanium stabilization improves machinability compared to standard ferritic grades.

Welding Characteristics

Excellent weldability due to titanium stabilization
No post-weld heat treatment requiredMaintains corrosion resistance in weld zoneMatching filler metals recommended

Titanium prevents sensitization and maintains properties across welds.

Temperature Limits

Continuous Service: Up to 800°C
Maximum Service: 850°C
Avoid: 475-900°C (embrittlement range)
Minimum Service: -30°C

Good high-temperature stability for many industrial bar applications.

Key Standards

ASTM A276 439: Stainless Steel Bars
ASTM A479 439: Bars for Pressure Vessels
EN 10088-3: Stainless Steel Bars
JIS G4303: Stainless Steel Bars
SAE J1396: Automotive Standards

Widely used in automotive exhaust and appliance bar applications.

Common Applications

• Automotive Exhaust Components: Exhaust manifolds, catalytic converter housings, muffler flanges, exhaust pipes
• Appliance Components: Dishwasher parts, washing machine drums, oven components, range parts
• Heat Exchanger Parts: Automotive radiator headers, charge air cooler components
• Architectural: Handrail components, decorative trim, structural supports (indoor)
• Food Service Equipment: Sink accessories, kitchen equipment parts, mild service components
• Industrial: Ventilation components, fume exhaust parts, mild chemical equipment
• Furniture: Outdoor furniture frames, display system components, structural parts

Specifically designed for cost-effective bar applications requiring better performance than 430.