Grade overview

It combines high carbon and chromium to achieve high hardness, wear resistance and rolling-contact fatigue performance after heat treatment.

Typical applications

Ball and roller bearings, races, precision wear components and selected tooling applications.

Equivalent / related designations

Commonly compared with EN 100Cr6. Steel cleanliness and inclusion control are as important as nominal chemistry for bearing life.

Common manufacturers and supply

Known producers include Ovako, Sanyo Special Steel, Daido Steel, CITIC Special Steel and other bearing-quality specialty mills.

Fabrication and selection notes

Confirm the exact product standard, edition, dimensions, delivery condition, mechanical properties, impact requirements, heat treatment, welding procedure, corrosion environment and certification. A grade name alone is not sufficient for procurement or design approval.

QA/QC documentation

For critical service, verify heat number traceability, mill test certificate, chemical analysis, tensile/impact results where required, NDT, heat-treatment record and project-specific third-party inspection requirements.

Element Folio engineering reference. Values and requirements vary by standard edition, product form and manufacturer; always verify the latest governing specification.