C45K spring steel, standard spring steel. Equivalent to the domestic 45 steel -Ck45 carbon tool steel standards: JIS, G4401 characteristics and scope of application: after quenching and tempering, higher hardness and wear resistance, but low hardness, hardenability, deformation, plasticity and strength is low. As a variety of tools need to have high hardness and wear resistance, such as simple shape and mold punch, metal cutting tools, drilling tools, woodworking milling cutter, Countersinks, axes, chisels, vertical hand saws, and fitter assembly tools, rivet die of other tools.
C45K spring steel chemical composition: carbon silicon manganese Mn:0.10-0.50 C:0.800.90 Si:0.10-0.35 S:0.030 P:0.030 Cr: sulfur phosphorus chromium content of 0.25, 0.10 (to allow the residual manufacturing lead bath quenching steel wire) Ni : allow residual content of 0.20, 0.12 (manufacturing lead bath quenching steel wire copper Cu): allow residual content of 0.30, 0.20 (manufacturing lead bath quenching steel wire) Note: allow residual content of Cr+Ni+Cu0.40 (manufacturing lead bath quenching steel wire) mechanical properties: hardness: annealing, 187HB, indentation diameter 4.40mm; quenching, heat treatment and microstructure of 62HRC specification: specification of heat treatment: quenching specimen 780820, cold water. Delivery status: Steel delivered in annealed condition. By agreement of both parties, delivery can also be made without annealing.
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