|
Material |
Sphere diameter(mm) |
HRC |
Broken rate |
Impact value |
Falling ball numbers |
Micro structure |
|
45# |
20mm-150mm |
≥45 |
≤1% |
≥12J/CM^2 |
≥10000 |
M+C |
|
50Mn |
20mm-150mm |
45-50 |
≤1% |
≥15J/CM^2 |
≥12000 |
M+C |
|
60Mn |
20mm-150mm |
55-60 |
≤1% |
≥15J/CM^2 |
≥12000 |
M+C |
|
65Mn |
20mm-150mm |
60-65 |
≤1% |
≥12J/CM^2 |
≥10000 |
M+C |
|
B-1 |
20mm-150mm |
50-55 |
≤1% |
≥15J/CM^2 |
≥12000 |
M+C |
|
B-2 |
20mm-150mm |
58-65 |
≤1% |
≥15J/CM^2 |
≥12000 |
M+C |
|
B-3 |
20mm-150mm |
60-65 |
≤1% |
≥15J/CM^2 |
≥12000 |
M+C |
|
40Cr |
20mm-150mm |
45-50 |
≤1% |
≥12J/CM^2 |
≥8000 |
M+C |
Chemical Components
|
Material |
C |
Si |
Mn |
Cr |
Cu |
Mo |
P |
S |
|
45# |
0.42-0.50 |
0.17-0.37 |
0.5-0.8 |
0-0.25 |
0-0.25 |
0-0.30 |
0-0.035 |
0-0.035 |
|
50Mn |
0.48-0.56 |
0.17-0.37 |
0.70-1.0 |
0-0.25 |
0-0.25 |
0-0.30 |
0-0.035 |
0-0.035 |
|
60Mn |
0.57-0.65 |
0.17-0.37 |
0.7-1.0 |
0-0.25 |
0-0.25 |
0-0.30 |
0-0.035 |
0-0.035 |
|
65Mn |
0.62-0.70 |
0.17-0.37 |
0.9-1.0 |
0-0.25 |
0-0.25 |
0-0.30 |
0-0.035 |
0-0.035 |
|
B-1 |
0.52-0.65 |
0.17-0.37 |
0.6-1.2 |
0.25max |
|
|
0-0.035 |
0-0.035 |
|
B-2 |
0.5-0.8 |
0.17-0.37 |
0.6-0.8 |
0.9-1.1 |
|
|
0-0.035 |
0-0.035 |
|
B-3 |
0.72-0.92 |
0.17-0.37 |
0.7-1.0 |
0.5-0.9 |
|
|
0-0.035 |
0-0.035 |
|
40Cr |
0.37-0.45 |
0.17-0.37 |
0.5-0.8 |
0.8-1.1 |
|
|
|
|
Surface treatment: water quenching oil quenching air quenching
Feature:
1) In general, has high hardness: surface hardness to 45-65 HRC
2) Impact toughness high: impact toughness more than 12 -15J / cm2.
3) Broken rate is low: the actual broken rate is not higher than 1%.
4) Loss of grinding forged steel ball round rate is low.