WL Co21

WL-Co21 (previously known as WL-Co8) was developed in the mid 1930s as a corrosion resistant CoCr alloy, and rapidly found application as a biocompatible hip implant and denture alloy. Many of the alloys currently used in medical applications are variants of the original WL-Co21 composition. It was also one of the first heat-resistant alloys trialled for use in jet engines.

WL-Co21 consists of a CoCrMo alloy matrix containing dispersed hard carbides which strengthen the alloy and increase its hardness, but also decrease the ductility. The type, shape, size, and distribution of the carbides is strongly influenced by the processing history of the alloy, and for this reason the mechanical properties of WL-Co21 are very dependent upon the manufacturing route and any subsequent heat treatments.

WL-Co21 has excellent resistance to thermal and mechanical shock. Optimum high temperature strength is obtained by solution heat treatments at 1200-1240ºC (2190 - 2265ºF) followed by quenching, and aging in the temperature range 7001150°C (1290-2100°F).

Common Names: Stellite 21, BISHILITE (MHA) No.21, Weartech WT-21
Standard:AWS / ASME: A5.13 / SFA5.13 ECoCr-E

For length 350mm 5kg per Vacuum Pack, 1 Vacpak inside a Carton

a carton 4 packs a total of 20kg, then put them in wooden boxes or trays.

Packaging details can also be customized according to customer requirements.

It is usd for applications involving cavitation, erosion, corrosion and/or high temperatures,

such as valve trim for petrochemical and power generation, biocompatible hip implant and denture alloy,

Fluid valve seat, turbine blades, hot forging die etc.