61SiCr7 Steel

Steel name: 61SiCr7
Diagram No.: 1544
DIN designation: 61SiCr7
Chemical composition in weight %: 0.59-0.64% C, 1.60-1.80% Si, 0.70-0.90% Mn, 0.035% P, 0.025% S, 0.20-0.40% Cr
Steel group: Spring steels
Applications: 61SiCr7 is a Silicon Manganese alloy steel mainly used for heavy duty springs, but also used for tooling where impact resistance is of importance. As-quenched hardness is expected to fall within a range of about 58 - 63 HRC. Hardenability is considered fairly high.
Comment: Ms=238 C, Ac1=772 C, Ac3=814 C.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 870oC/in oil
Tempering: Tempering at min. 150 C immediately after the temperature after hardening has reached 40 -50 C

Hardenability Diagram


Click the image to enlarge the diagram.

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