Wilfley’s WCD4™ duplex stainless steel is ideal for erosion‑corrosion applications in extremely corrosive environments
WCD4™ is a specially processed duplex stainless steel that is chemically similar to ASTM A890 (cast material) or UNS S32550 (wrought material) but with significantly improved mechanical properties and corrosion resistance.
WCD4™ is ideal for erosion-corrosion applications in extremely corrosive environments. Pump wear parts made from WCD4™ are expected to have exceptional wear life due to its increased hardness and improved corrosion resistance.
![wilfley-centrifugal-pumps-wcd4-duplex-stainless-steel-photo](https://www.wilfley.com/insyntrix/wp-content/uploads/2020/06/wilfley-centrifugal-pumps-wcd4-duplex-stainless-steel-photo.jpg)
Mechanical Properties
Typical Hardness | Typical Tensile Strength | Typical Yield Strength | Typical Elongation | |
Wilfley WCD4™ | 345 HBN | 164,000 psi (1,131 MPa) | 113,000 psi (779 MPa) | 16% |
Increase over standard CD4MCu | 38% | 64% | 61% | – |
Wilfley WCD4™ | Increase over standard CD4MCu | |
Typical Hardness | 345 HBN | 38% |
Typical Tensile Strength | 164,000 psi (1,131 MPa) | 64% |
Typical Yield Strength | 113,000 psi (779 MPa) | 61% |
Typical Elongation | 16% | – |
Chemical Composition (Weight %)
C | Mn | Si | P | S | Cr | Ni | Mo | Cu | N | Fe |
Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum | Copper | Nitrogen | Iron |
0.04 max | 1.2 max | 1.0 max | 0.04 max | 0.04 max | 24.5-26.5 | 4.7-6.5 | 1.75-3.8 | 1.5-3.25 | 0.1-0.25 | Balance |
Carbon (C) | 0.04 max |
Manganese (Mn) | 1.2 max |
Silicon (Si) | 1.0 max |
Phosphorus (P) | 0.04 max |
Sulfur (S) | 0.04 max |
Chromium (Cr) | 24.5-26.5 |
Nickel (Ni) | 4.7-6.5 |
Molybdenum (Mo) | 1.75-3.8 |
Copper (Cu) | 1.5-3.25 |
Nitrogen (N) | 0.1-0.25 |
Iron (Fe) | Balance |
WCD4™ vs. Standard CD4MCu
Increased Wear Life
(Sample data based on pin-on-disk testing)
![](https://www.wilfley.com/insyntrix/wp-content/uploads/2020/11/70.png)
Increased Corrosion Resistance
(Sample data based on testing with 65% nitric acid)
![](https://www.wilfley.com/insyntrix/wp-content/uploads/2020/11/30.png)
Wilfley Case Study
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