ASTM A815 WPS32101
ASTM A815 WPS32101 Duplex Stainless Steel Pipe Fittings
ASTM A815 WPS32101 pipe fittings are manufactured using a duplex stainless steel grade identified by the UNS designation S32101. This grade is known as Lean Duplex Stainless Steel, offering an excellent balance of mechanical strength, corrosion resistance, and cost-efficiency.
These fittings feature a mixed microstructure of ferrite and austenite, providing exceptional yield strength compared to standard austenitic stainless steels like 304/316, while maintaining impressive corrosion resistance in chloride-bearing environments.
Key Features
Lean duplex stainless steel UNS S32101
Higher strength than conventional stainless steel (304/316)
Excellent resistance to pitting & crevice corrosion
Outstanding stress-corrosion cracking resistance
Suitable for seawater, chemicals, and mildly acidic environments
Cost-effective alternative to super duplex grades
Good weldability and fabricability
Specifications
| Standard | ASTM A815 / ASME SA815 |
|---|---|
| Grade | WPS32101 |
| UNS | S32101 |
| Material Type | Lean Duplex Stainless Steel |
| Forms | Butt-weld Pipe Fittings |
| Manufacture | Seamless / Welded / Cold-worked |
| Compliance | ANSI / ASME / MSS-SP-43 / DIN / EN |
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32101 |
| EN / DIN | 1.4482 |
| ASTM | Lean Duplex Stainless Steel |
| Trade Names | LDX 2101® (Common Industry Name) |
Available Sizes
Butt-weld fittings: ½” to 48”
Schedules: SCH 10 to SCH XXS
Custom dimensions available
Chemical Composition
| Element | % |
|---|---|
| Chromium (Cr) | 21.0 – 22.0 |
| Nickel (Ni) | 1.35 – 1.70 |
| Molybdenum (Mo) | ≤ 0.80 |
| Manganese (Mn) | 4.00 – 6.00 |
| Nitrogen (N) | 0.19 – 0.25 |
| 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 Grades |
| Melting Range | ~1370 – 1450°C |
Types of ASTM A815 WPS32101 Fittings
ASTM A815 WPS32101 Elbow
ASTM A815 WPS32101 Tee
ASTM A815 WPS32101 Reducers
ASTM A815 WPS32101 Caps
ASTM A815 WPS32101 Cross Fittings
ASTM A815 WPS32101 Nipples
ASTM A815 WPS32101 Couplings
ASTM A815 WPS32101 Stub Ends
Corrosion Resistance
Excellent resistance against:
Chloride-induced pitting and crevice corrosion
Stress-corrosion cracking
Seawater & brackish water
Mild acids & industrial chemicals
Heat Resistance
Suitable for moderate-temperature applications
Avoid prolonged exposure above 300–325°C to prevent embrittlement
Heat Treatment
Solution annealed during production
Cannot be hardened by heat treatment (strength by cold-working)
Welding
Good weldability with duplex-compatible filler metals
Maintain proper heat input for balanced phase structure
Preheat/post-heat generally not required
Fabrication
Good machinability & formability
Use carbide tools for machining
Avoid excessive cold-forming without annealing
Applications
Offshore & Marine Engineering
Chemical & Petrochemical Plants
Desalination Systems & Water Treatment
Power & Energy Industries
Structural Piping Systems
Pulp & Paper Processing
Mining & Mineral Handling