Ball Bearing Steel (Grade EN-31)

Grade Introduction:

EN31 is a very high strength steel alloy that has nickel, chromium, molybdenum making its high tensile steel strength, with good ductility and wear resistance. With relatively good impact properties at low temperatures, EN31 is also suitable for a variety of elevated temperature applications. EN31 round bars have good internal strength and high external strength, which makes them highly wear-resistant. EN31 steel round bars offer a good combination of ductility, strength, and wear resistance. EN31 is a very high-strength alloy engineering steel.

Supplied Condition:

As Rolled

Grade Applications:

Typical applications for EN31 steel include taps, gauges, swaging dies, ejector pins, ball, and roller bearings. It is good quality steel for wear-resisting machine parts and for press tools that do not merit a more complex quality.

Annealing:

EN31 is usually supplied in the annealed and machinable conditions. Re-annealing will only be necessary if the steel has been forged or hardened. To anneal, heat the EN31 steel slowly to 800-810°C, soak well and allow it to cool in the furnace.

Equivalent Grades:

Chemical Composition:

Hardness:

290-340 BHN