100CrMnSi4-4 Steel

100CrMnSi4-4 Steel

Steel name: Ovako 831
Diagram No.: 2695
ASTM designation: A485 grade 1/B2
DIN designation: 100CrMnSi4-4
Chemical composition in weight %: 0.91-1.02% C, <0.29% Si, 0.20-0.40% Mn, <0.015% P, 0.005-0.015% S, 1.00-1.15% Cr, 0.06-0.10% Mo, 0.10-0.25% Ni
Steel group: Bearing steels
Properties: Ovako 831 is a through hardening bearing steel that is mainly used for medium sized martensitic hardened bearing components, but it can also be used for machine components that require high tensile strength and high hardness. Ovako 831 has a controlled Ni and Mo content for enhanced and consistent hardenability.
Applications: Bearings
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 830-870°C, 10-60 min, in oil (temper within 2h).
Tempering: 160-500°C, air.
Diagram note: Ac1=750 C, Ac3=750 C, Ms=236 C.

Tempering Diagram

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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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