METALLURGY

METALLURGY

The longer your pump lasts, the stronger your life cycle costs, and ROI become. Centennial pumps are designed by A.R. Wilfley engineering, with more than 100 years of pump experience, to maximize your pump life. Centennial offers both cast steel and our patented WCD4™ metallurgy. WCD4™, is Wilfley’s specially processed duplex stainless steel with significantly improved abrasion and corrosion resistance properties, providing increased service life in abrasive and chemically aggressive applications. Wilfley’s proprietary WCD4™ material is 60% harder versus 316SS, and you can realize a 60% longer wear life or even more.
Material Specification Ave. Hardness Max. Tensile Strength Min. Yield Strength Min. Elongation
WCD4™
ASTM A890 Grade 1B
345 HBN
164,000 psi
(1,131 MPa)
113,000 psi
(779 MPa)
16%
316SS
ASTM A743 Grade CF-3M
215 HBN
84,100 psi (580 MPa)
42,100 psi (290 MPa)
50%
WCD4™ is a superior super-duplex stainless steel that could offer better corrosion resistance than 316SS. As an example in 65% boiling nitric acid, WCD4TM offers 5x improved corrosion resistance versus 316SS. Centennial’s Superior materials provide longer lasting and more durable pumps for consistent and reliable operation, and longer lasting pumps also directly contribute to reduced cost of ownership for your pumps.
WCD4™ is a superior duplex stainless steel that offers better abrasion resistance than 316SS. As an example, in wear testing (per ASTM G99) carried out with a pin-on-disk apparatus using a 0.5 inch diameter alumina ball, the wear resistance of WCD4™ was 84.15% better than 316SS. Centennial’s Superior materials provide longer lasting and more durable pumps for consistent and reliable operation, and longer lasting pumps also directly contribute to reduced cost of ownership for your pumps.

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