ASTM A815 WPS32202
ASTM A815 WPS32202 Duplex Stainless Steel Pipe Fittings
ASTM A815 WPS32202 pipe fittings are manufactured from Duplex Stainless Steel Grade UNS S32202, a cost-efficient duplex alloy designed to offer excellent mechanical strength, enhanced corrosion resistance, and improved stress-corrosion cracking resistance compared to conventional austenitic stainless steels such as 304/316.
With a balanced ferrite-austenite microstructure, UNS S32202 delivers high tensile strength, lower nickel content for cost efficiency, and reliable performance in chloride-rich and harsh service environments. These fittings are widely used in industrial piping systems where strength, corrosion protection, and long-term durability are critical.
Key Features
Duplex Stainless Steel UNS S32202
Higher strength than 300-series stainless steels
Excellent resistance to pitting & crevice corrosion
Great performance in chloride-containing and marine environments
Strong resistance to stress-corrosion cracking
High fatigue strength & durability
Cost-effective duplex alternative with reduced Ni content
Suitable for high-pressure & corrosive service
Specifications
| Standard | ASTM A815 / ASME SA815 |
|---|---|
| Grade | WPS32202 |
| UNS | S32202 |
| Material Type | Lean Duplex Stainless Steel |
| Form | Butt-Weld Pipe Fittings |
| Manufacturing Process | Seamless / Welded / Cold-Worked |
| Compliance | ASME / ANSI / MSS-SP-43 / EN / DIN |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32202 |
| EN / DIN | — (Lean duplex equivalent range) |
| ASTM | Lean Duplex Stainless Steel |
| Trade Names | Commonly marketed as Lean Duplex Alloy |
UNS S32202 is similar in performance category to Duplex UNS S32101 (LDX 2101®), with minor differences in alloy balance.
Available Sizes
Sizes: ½” to 48”
Schedules: SCH 10 – SCH XXS
End Type: Butt-Weld / Beveled / Custom
Custom fittings available on request
Chemical Composition
| Element | % |
|---|---|
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 0.80 – 2.50 |
| Molybdenum (Mo) | ≤ 0.60 |
| Manganese (Mn) | ≤ 5.00 |
| Nitrogen (N) | 0.15 – 0.35 |
| Silicon (Si) | ≤ 1.00 |
| Carbon (C) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 650 MPa |
| Yield Strength | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 290 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | ~7.7 g/cm³ |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | Higher than Austenitic SS |
| Melting Range | ~1370 – 1450°C |
Types of ASTM A815 WPS32202 Fittings
ASTM A815 WPS32202 Elbow
ASTM A815 WPS32202 Tee
ASTM A815 WPS32202 Reducers
ASTM A815 WPS32202 Caps
ASTM A815 WPS32202 Cross Fittings
ASTM A815 WPS32202 Nipples
ASTM A815 WPS32202 Couplings
ASTM A815 WPS32202 Stub Ends
Corrosion Resistance
Provides excellent resistance to:
Chloride-induced pitting & crevice corrosion
Stress-corrosion cracking (SCC)
Seawater & brackish water corrosion
Acidic & alkaline industrial environments
Designed to outperform standard stainless grades in corrosive conditions.
Heat Resistance
Suitable for moderate temperature service
Avoid long exposure between 300°C – 600°C to prevent embrittlement
Heat Treatment
Supplied in solution-annealed condition
Cannot be hardened by heat treatment (strength via cold working)
Welding
Good weldability using duplex fillers
Maintain controlled heat input to preserve duplex structure
Pre-heat / Post-weld heat treatment generally not required
Fabrication
Good fabricability with proper tools
Use carbide tooling for machining
Avoid excessive cold forming without intermediate annealing
Applications
Desalination & Water Treatment
Marine & Offshore Applications
Petrochemical & Chemical Processing
Structural Components & Piping Systems
Pulp & Paper Mills
Mining & Mineral Processing
Food & Beverage Processing Equipment