WCD4™ Duplex Stainless Steel
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 WCD4™||345 HBN||164,000 psi
|Increase over standard CD4MCu||38%||64%||61%||–|
Chemical Composition (Weight %)
|0.04 max||1.2 max||1.0 max||0.04 max||0.04 max||24.5-26.5||4.7-6.5 max||1.75-3.8||1.5-3.25||0.1-0.25||Balance|
WCD4™ vs. Standard CD4MCu
Increased Wear Life
(Sample data based on pin-on-disk testing)
Increased Corrosion Resistance
(Sample data based on testing with 65% nitric acid)
Anodic Slurry in Copper Refinery Application
The abrasive and corrosive solution was wearing through Alloy 20 (ASTM A743 Grade CN7M) pump parts at a much higher rate than desired. The customer upgraded one of the pumps to WCD4™ as a trial and couldn’t believe the results. The wear life of the pump increased from 6-8 months to over 3 years. The customer has since upgraded all of their pumps to WCD4™.
Phosphoric Acid Application
A customer who had been purchasing Wilfley chemical pumps in Illium® P (duplex stainless steel similar to CD4MCu) recently carried out a study and determined that the increased hardness of WCD4™ significantly improved the parts longevity in their pumps. The WCD4™ parts don’t just last longer, they’re also less expensive and have shorter lead times than Illium® P.
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