GCr15 Material Hardness
Spheroidizing annealing hardness: 179-207 HBW
Softening annealing hardness: ≤245 HBW
Bending of GCr15 bearing steel
Hot rolled round steel: ≤3mm/meter; Total bending: ≤0.3% x length
Hot rolled annealing round steel: ≤3mm/meter; Total bending: ≤0.3% x length
Calcined round steel: ≤5mm/meter; Total bending: ≤0.5% x length
Cold drawn round steel (Φ≤25mm): ≤2mm/meter; Total bending: ≤0.2% x length
Cold drawn round steel (Φ>25mm): ≤1.5mm/meter; Total bending: ≤0.15% x length
Heat treatment Related
Annealing of GCr15 Alloy bearing steel
Slowly heated to 790-810 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. Different annealing ways will get different hardness.The GCr15 bearing steel will get Hardness MAX 248 HB （Brinell hardness）.
Quenching and temperature of GCr15 Alloy bearing steel
Heated slowly to 860°C, Then quenching by oil get 62 to 66 HRc hardness. High temperature tempering: 650-700℃，cool in air, get hardness 22 to 30HRC. Low temperature tempering: 150-170 ℃， Cool in ari, get 61-66HRC hardness.
Hot work and cold work of GCr15 Alloy bearing steel
GB GCr15 steel can hot worked at 205 to 538°C, GCr15 Bearing steel can be cold worked using conventional techniques in the annealed or normalized conditions.
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