GCR15SIMN Features 
 ● Features and Scope: GCr15 steel is based on an appropriate increase in Si, Mn content in order to improve its hardenability and the elastic limit, wear resistance than GCr15 good. Manufacture of rolling size range of application than GCr15 large, mainly for the manufacture of wall thickness> 12mm, diameter> 280mm diameter steel ball bearing rings> 50mm; conical, cylindrical and spherical roller diameter> 22mm and all size needle . 

 Chemical composition 
 ● Chemical Composition: C: 0.95 ~ 1.05 Si Si: 0.40 ~ 0.65 Manganese Mn: 0.90 ~ 1.20 

 S S: ≤ 0.020 P P: ≤ 0.027 Chromium Cr: 1.30 ~ 1.65 Nickel Ni: ≤ 0.30 Cu Cu: ≤ 0.25 [2] 

 Mechanical Properties 
 ● Mechanical Properties: Tensile σb (MPa): 1831 Impact energy Akv (J): 23 Hardness: 65HRC sample size: a sample ● Heat treatment and microstructure specifications: heat treatment specification: 830 ~ 840 ℃ quenching, oil cooling ; 160 ℃ tempered 3h. Microstructure: martensite. Material Name: (cementite) bearing steel grade: G20CrMo Standard: GB / T 3203-1982 

 ● Chemical Composition: C: 0.17 ~ 0.23 (tolerance: ± 0.02) Si Si: 0.20 ~ 0.35 (tolerance: ± 0.03) Manganese Mn: 0.65 ~ 0.95 (tolerance: ± 0.04) S S: ≤ 0.030 (allowing deviation: 0.005) Phosphorus P: ≤ 0.030 (tolerance: 0.005) chromium Cr: 0.35 ~ 0.65 (tolerance: ± 0.15) Cu Cu: ≤ 0.25 (Tolerance: +0.05) Mo Mo: 0.08 ~ 0.15 ( Tolerance: ± 0.02) ● Mechanical Properties: ● Heat treatment and microstructure specifications: ● Delivery status: hot-rolled or forged steel to hot rolling (forging) state or annealed state of delivery. Annealed cold-drawn steel to the state of delivery.