ASTM A815 WPS32950
ASTM A815 WPS32950 Duplex Stainless Steel Pipe Fittings
ASTM A815 WPS32950 pipe fittings are manufactured from high-performance duplex stainless steel grade UNS S32950, known for its balanced austenitic-ferritic microstructure. These fittings deliver exceptional strength, superior chloride stress-corrosion cracking resistance, and outstanding performance in harsh and corrosive industrial environments.
Designed to meet demanding service conditions, ASTM A815 WPS32950 fittings are ideal for critical piping systems in marine, offshore, chemical, desalination, and power generation applications. They provide excellent toughness, high mechanical strength, and long-term durability, making them a preferred choice for aggressive environments.
Key Features
Duplex stainless steel grade UNS S32950
High resistance to chloride-induced corrosion & pitting
Excellent mechanical strength & fatigue resistance
Suitable for high-pressure & high-temperature systems
Superior stress-corrosion cracking resistance
Durable performance in seawater, chemicals & acidic media
Long-term reliability and low maintenance
Technical Specification
| Specification | Details |
|---|---|
| Standard | ASTM A815 / A815M |
| Grade | WPS 32760 |
| Material | Super Duplex Stainless Steel |
| UNS | S32760 |
| Manufacturing Class | WPS – Welded, Pickled, Solution Annealed |
| Form | Butt Weld Pipe Fittings |
| Standards | ANSI / ASME B16.9, B16.28, MSS SP-43 / SP-75 |
| Type | Wrought Fittings |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32760 |
| EN | 1.4501 |
| ASTM | A182 F55 / A276 S32760 |
| DIN | X2CrNiMoCuWN25-7-4 |
| ISO | 25Cr super duplex |
| Common Trade Name | Zeron® 100 |
Available Sizes
NPS: ½” to 24”
Schedules: SCH 10S to SCH 160 / XXS
Forms Available: Seamless / Welded / Fabricated
Chemical Composition
| Element | % |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 4.0 |
| Tungsten (W) | 0.5 – 1.0 |
| Copper (Cu) | 0.5 – 1.0 |
| Nitrogen (N) | 0.2 – 0.3 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.02 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 750 MPa |
| Yield Strength | ≥ 550 MPa |
| Elongation | ≥ 25% |
| Impact Toughness | Excellent, even at -50°C |
| Hardness | ≤ 310 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ |
| Melting Range | ~1450°C |
| Thermal Conductivity | 14.0 W/m-K |
| Modulus of Elasticity | ~200 GPa |
Types of ASTM A815 WPS32950 Fittings
ASTM A815 WPS32950 Elbow
ASTM A815 WPS32950 Tee
ASTM A815 WPS32950 Reducers
ASTM A815 WPS32950 Caps
ASTM A815 WPS32950 Cross Fittings
ASTM A815 WPS32950 Nipples
ASTM A815 WPS32950 Couplings
ASTM A815 WPS32950 Stub Ends
Corrosion Resistance
Excellent resistance to:
Seawater corrosion
Chloride stress cracking
Pitting & crevice corrosion (PREN > 40)
Sulfide stress cracking in sour service (NACE MR0175)
Acidic & alkaline chemical exposure
Ideal for offshore and aggressive marine environments.
Heat Resistance
Suitable up to 300°C continuous service
Better thermal fatigue resistance than austenitic steel
Retains strength at elevated temperatures
Heat Treatment
| Treatment | Description |
|---|---|
| Solution Annealing | 1020°C – 1120°C |
| Cooling | Rapid water quench |
| Hardening | Not hardenable by heat treatment (work hardened only) |
Welding
Good weldability with proper procedures
Recommended filler metals: ER2594, E2594
Preheat not required; interpass ≤ 150°C
Post-weld solution annealing recommended for critical service
Fabrication
Good machinability with high-speed tools
Avoid excessive cold working without subsequent heat treatment
Bending & forming possible with proper technique
Applications
Offshore oil & gas platforms
Subsea equipment & pipelines
Chemical & petrochemical plants
Desalination & seawater intake systems
Pulp & paper industry
Heat exchangers & pressure vessels
Marine engineering components