ASTM A815 CR430Ti
ASTM A815 CR430Ti Titanium Stabilized Ferritic Stainless Steel Pipe Fittings
ASTM A815 CR430Ti pipe fittings are precision–engineered from titanium-stabilized ferritic stainless steel Grade 430Ti (UNS S43036), manufactured under Class CR for cold-worked welded stainless steel fittings compliant with MSS SP-43. These fittings offer enhanced corrosion resistance, improved weldability, and excellent mechanical performance in elevated temperature applications.
Titanium stabilization prevents carbide precipitation during welding and heat exposure, making CR430Ti fittings highly reliable for chemical, thermal, and industrial environments where resistance to intergranular corrosion and scaling is essential.
Key Features
Titanium-stabilized ferritic stainless steel (UNS S43036)
Manufactured to CR class (cold-worked welded fittings)
Excellent resistance to intergranular corrosion
Superior weldability and fabricability vs standard 430
Good high-temperature scaling and oxidation resistance
High mechanical strength & dimensional stability
Cost-effective corrosion-resistant solution
Specifications
| Specification | Details |
|---|---|
| Standard | ASTM A815 / A815M |
| Grade | CR430Ti |
| Class | CR (MSS SP-43 Cold-Worked Fittings) |
| UNS Number | S43036 |
| Material Type | Titanium-stabilized ferritic stainless steel |
| Manufacturing | Welded & cold-worked |
| Standards | MSS SP-43, ASME B16.9 / B16.28 (where applicable) |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S43036 |
| EN / DIN | 1.4511 (Approx.) |
| AISI | 430Ti (Comparable) |
| JIS | SUS 430LX (Comparable) |
Equivalents listed for reference based on composition similarity.
Available Sizes
Size Range: ½” – 24” NPS
Schedule: SCH 10s to SCH 80 (others on request)
Types: Cold-worked welded fittings
Chemical Composition
| Element | % |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Carbon (C) | ≤ 0.12 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Titanium (Ti) | Stabilizing addition |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 450 MPa |
| Yield Strength | ≥ 275 MPa |
| Elongation | ≥ 20% |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.70 g/cm³ |
| Melting Point | 1450–1510°C |
| Modulus of Elasticity | ~200 GPa |
| Thermal Conductivity | Higher than austenitic grades |
Types of ASTM A815 CR430Ti Fittings
ASTM A815 CR430Ti Elbow
ASTM A815 CR430Ti Tee
ASTM A815 CR430Ti Reducers
ASTM A815 CR430Ti Caps
ASTM A815 CR430Ti Cross Fittings
ASTM A815 CR430Ti Nipples
ASTM A815 CR430Ti Couplings
ASTM A815 CR430Ti Stub Ends
Corrosion Resistance
Resistant to:
Intergranular corrosion
Oxidation & scaling
Mild acids and chemicals
Atmospheric & industrial environments
Titanium stabilization prevents carbide precipitation after welding
Heat Resistance
Suitable for continuous service up to ~800°C
Excellent scaling resistance
Maintains structural stability under thermal stress
Heat Treatment
| Process | Details |
|---|---|
| Annealing | 750 – 800°C, air cooled |
| Stress Relief | Recommended after heavy cold-working |
| Stabilization | Achieved via titanium addition |
Welding
Superior weldability vs standard 430 due to Ti stabilization
Suitable processes: TIG / MIG / SMAW
Typically no pre-heat or post-weld heat treatment needed
Use matching ferritic stainless filler metals
Fabrication
Good formability & machinability
Suitable for bending, forming, and flanging
Avoid excessive cold-working without annealing
Applications
Chemical processing equipment
Automotive exhaust systems
Heat exchangers & furnace equipment
Flue gas & industrial gas systems
Food processing & dairy equipment
Power plants & petrochemical units
Architectural & ducting systems