Corodur 51 description: CORODUR 51 OA is a flux-cored wire which deposits a martensitic matrix with a high content of Cr-Carbides M7C3 with excellent resistance to abrasion and medium impact up to 450C. It can be applied whenever high abrasion is expected. Best results are achieved by welding in two layers. The deposit can not be machined or forged. Before overlaying old previously hardfaced surfaces a buffering layer of CORODUR 200 K or CORODUR 250 K is recommended.