Forged Steel balls

Diameter tolerance and roundness

Diameter 30 40 50 60 70 80 90 100 110 120 125 150
Diameter roundness(mm)
±2
+3,-2
+4,-3
+5,-4
Roundness(%)
≤2
≤3
≤4
≤5

Chemical composition

Brand C(%) Si(%) Mn(%) Cr(%) Cu(%) Mo(%) P(%) S(%) Ni(%)
45#
0.42-0.50
0.17-0.37
0.5-0.80
0-0.25
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
60Mn
0.57-0.65
0.17-0.37
0.70-1.0
0-0.25
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
65Mn
0.62-0.70
0.17-0.37
0.90-1.0
0-0.25
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
70Mn
0.67-0.75
0.17-0.37
0.90-1.20
0-0.25
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
40Cr
0.37-0.45
0.17-0.37
0.50-0.8
0.80-1.1
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
70Cr2
0.65-0.75
0.20-0.30
0.75-0.90
0.55-0.70
0-0.25
0-0.30
0-0.030
0-0.030
0-0.30
B-2
0.70-0.80
0.17-0.37
0.70-0.80
0.50-0.60
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30
B-3
0.58-0.66
1.2-1.6
0.65-0.80
0.70-0.90
0-0.25
0-0.30
0-0.035
0-0.035
0-0.30

Technical specification

Brand Breakage rate Hardness(HRC) Impact value(J/cm²) Drop times(times) Micro structure
45#
<1%
≥45
≥12
≥8000
M+C
60Mn
<1%
≥55
≥12
≥12000
M+C
65Mn
<1%
≥58
≥12
≥12000
M+C
70Mn
<1%
≥60
≥12
≥12000
M+C
40Cr
<1%
≥55
≥12
≥12000
M+C
70Cr2
<1%
≥58
≥12
≥12000
M+C
B-2
<1%
≥58
≥12
≥15000
M+C
B-3
<1%
≥60
≥12
≥15000
M+C

Erenhot Gegen Import and Export Trading Co., Ltd.

Can you help me?

Contact Us

Telephone: +8615847990877

Email: 854491364@qq.com

Factory Address: No. 2, E2 Zone, Lizhong Logistics park, South of South Ring Road and East of West Ring Road, Erenhot City, Inner Mongolia Autonomous Region