Steel Billets for Ring Rolling
Seamless rolled rings are made by upsetting and piercing a cut piece of billet or bloom, then expanding it on a ring rolling mill. The piece must be sound at the centre where piercing takes place.
Typical components
- Bearing races
- Gear rings
- Flange rings
- Wind turbine rings
- Turbine and pressure rings
Recommended steel grades
EN31
A high carbon, chromium steel that reaches very high hardness and wear resistance after hardening.
SAE 52100
The reference high carbon chromium bearing steel, known for hardness, wear resistance and rolling contact fatigue life.
EN19
A widely used chrome-moly steel with good hardenability, toughness and fatigue strength in the quenched and tempered condition.
42CrMo4
The EN 10083 designation of the 4140 / EN19 family, widely specified for European and export orders.
ASTM A182 F22
A creep-resistant chrome-moly steel for forged flanges, fittings and valves operating at high temperature and pressure.
Choosing the billet
For larger rings, 200 × 200 and 250 × 250 mm blooms or 200 mm round blooms are the usual starting sections. Cleanliness is a main concern with bearing grades.
Check the billet size chart for sections and weight per metre, and use the weight calculator for any length.