SAE52100 GCr15 EN31 High Chromium Bearing Steel Hollow Bar for Axle
EN31/SAE52100/GCr15/SUJ2 steel refers to a high carbon and chromium bearing steel with less alloy content. After quenching and low temperature tempering, it has high hardness, uniform structure, good wear resistance and high contact fatigue performance.
1. Equivalent Grade
Chinese |
American |
German |
Japanese |
GB |
AISI |
DIN |
JIS |
GCr15 |
SAE52100 |
EN31 |
SUJ2 |
2. Chemical Composition (%)
Grades |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Cu |
Ni |
GCr15/
SAE52100 |
0.95-1.05 |
0.15-0.35 |
0.20-0.40 |
≤0.027 |
≤0.020 |
1.3-1.65 |
≤0.10 |
≤0.25 |
≤0.30 |
EN31 |
0.95-1.05 |
0.15-0.35 |
0.25-0.45 |
≤0.025 |
≤0.025 |
1.4-1.65 |
≤0.08 |
≤0.25 |
≤0.30 |
3. Surface Treatment
1) Round bar: Black /Grinding /Polished /Peeled /Turned
2) Steel plate: Black /Milling /Machined
4. SAE52100/GCr15/EN31/SUJ2 Ready Stock
Round Bar: diameter 4-290mm,length 3000-6000mm
Flat Bar: thickness 20-200mm, width 155-2200mm,length 2000-6000mm
All the dimensions can be customerized as fresh production with MOQ.
5. Characteristic
1) Good hot working performance.
2) Good machinability after spheroidizing annealing.
3) High hardenability and good comprehensive performance.
4) A kind of high carbon and chromium bearing steel which most widely used with a good permance and less alloy content.
5) High hardness, uniform organization, good wear resistance, high contact fatigue performance after quenching and tempering.
6. Competitive Advantage
1) Good purity and homogeneity.
2) Good dimensional stability during heat treatment.
3) Good machinability (roughing, grinding and drilling).
4) Excellent preparation for nitriding, both ionic and gaseous, induction hardening to increase the mechanical properties.
7. SAE52100/GCr15/EN31/SUJ2 Heat Treatment
Quenching |
Tempering |
Heating temperature/ºC |
Cooling way |
Hardness
(HRC) |
Tempering temperature/ºC |
Cooling way |
Hardness
(HRC) |
830-850 |
Oil Cooling |
62-65 |
150-190 |
Air Cooling |
58-62 |
8. SAE52100/GCr15/EN31/SUJ2 Mechanical Properties
Tensile strength |
Yield strength |
Elongation |
Hardeness |
σb (MPa):861.3 |
σs (MPa):518.42 |
δ5 (%):27.95 |
25.8HRC |