● Introduction: bearing steel, the British brands, the equivalent of China's GCr15SiMn
● Features and application:
100CrMnSi6-4 GCr15 steel, bearing steel is based on an appropriate increase in Si, Mn content in order to improve its hardenability and 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 ring> 50mm; conical, cylindrical and spherical roller diameter> 22mm and all needle sizes .
● Chemical Composition:
Carbon C: 0.95 ~ 1.05
Si Si: 0.40 ~ 0.65
Manganese Mn: 0.90 ~ 1.20
Sulfur S: ≤ 0.020
Phosphorus P: ≤ 0.027
Chromium Cr: 1.30 ~ 1.65
Ni-Ni: ≤ 0.30
Copper Cu: ≤ 0.25
● Mechanical Properties:
Tensile strength σb (MPa): 1831
Impact energy Akv (J): 23
Hardness: 65HRC
Sample size: a sample
● Heat treatment and microstructure specifications:
Heat treatment specifications: 830 ~ 840 ℃ quenching oil cooling; 160 ℃ tempering 3h.
Microstructure: martensite.
