ASTM A815 WP430Ti
ASTM A815 WP430Ti – Titanium Stabilized Ferritic Stainless Steel Pipe Fittings
ASTM A815 WP430Ti pipe fittings are manufactured from titanium-stabilized ferritic stainless steel Grade 430Ti (UNS S43036), designed to deliver exceptional corrosion resistance, improved weldability, and enhanced durability in high-temperature and mildly corrosive service conditions. As part of the ASTM A815 standard for wrought stainless steel fittings, WP430Ti fittings are widely used in chemical processing, automotive exhaust systems, heat exchangers, and industrial gas systems where resistance to scaling, oxidation, and intergranular corrosion is crucial.
With titanium stabilization, WP430Ti offers improved resistance to carbide precipitation during welding, ensuring excellent structural integrity and long service life in demanding environments.
Key Features
Titanium-stabilized ferritic stainless steel (UNS S43036)
Excellent resistance to intergranular corrosion
Superior weldability compared to standard 430 grade
Good resistance to oxidation and scaling
Stable structure at elevated temperatures
High strength and dimensional stability
Cost-effective stainless steel solution for corrosive environments
Specifications
| Specification | Details |
|---|---|
| Standard | ASTM A815 / A815M |
| Grade | WP430Ti |
| UNS Number | S43036 |
| Material Type | Titanium-stabilized ferritic stainless steel |
| Manufacturing Process | Seamless / Welded wrought fittings |
| Class | WP (Wrought Pipe Fittings) |
| Standard Compliance | MSS SP-43, ASME B16.9 / B16.28 (as applicable) |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S43036 |
| EN / DIN | 1.4511 (Approx.) |
| JIS | SUS 430LX (Comparable) |
| AISI | 430Ti (Comparable) |
Note: Equivalent grades are approximate based on composition similarity.
Available Sizes
Nominal Pipe Size (NPS): ½” to 48” (Custom sizes available)
Schedule: SCH 10s, 20, 40, 80, 160, XXS
Forms: Seamless & Welded
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 Range | 1450 – 1510°C |
| Thermal Conductivity | Higher than austenitic stainless steels |
| Modulus of Elasticity | ~ 200 GPa |
Types of ASTM A815 WP430Ti Fittings
ASTM A815 WP430Ti Elbow
ASTM A815 WP430Ti Tee
ASTM A815 WP430Ti Reducers
ASTM A815 WP430Ti Caps
ASTM A815 WP430Ti Cross Fittings
ASTM A815 WP430Ti Nipples
ASTM A815 WP430Ti Couplings
ASTM A815 WP430Ti Stub Ends
Corrosion Resistance
Excellent resistance to:
Mild acids
Organic and inorganic chemicals
Atmospheric corrosion
Oxidation & scaling
Titanium stabilization prevents intergranular corrosion during welding
Heat Resistance
Suitable for service up to ~800°C
Excellent oxidation resistance
Stable mechanical performance at elevated temperatures
Heat Treatment
| Condition | Description |
|---|---|
| Annealing | 750–800°C followed by air cooling |
| Stabilization | Titanium addition prevents carbide precipitation |
Welding
Good weldability compared to standard 430 due to Ti stabilization
Recommended welding processes:
TIG, MIG, SMAW
Pre- and post-heat treatment generally not required
Use filler metals compatible with ferritic stainless steels
Fabrication
Good formability and machinability
Suitable for bending, forming, and flanging
Avoid excessive cold working without annealing
Applications
Chemical processing equipment
Automotive exhaust components
Heat exchangers & furnace parts
Industrial gas & flue gas systems
Food processing equipment
Architectural & structural components
Pulp & paper industry systems