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Phone:+86-531 80957228/80952018
E-mail:sales@jnhuafu.cn / info@jnhuafu.cn
Zip code:250217
WhatsApp:+86-18563713664
ADD:Guanzhuang Town, Zhangqiu District, Jinan City, Shandong Province, China
Contact information
Products
Hot rolling steel cylpebs
1.Size and Tolerance
Size (mm) |
20x30 |
25x35 |
30x40 |
35x45 |
40x50 |
45x55 |
50x60 |
55x65 |
60x70 |
Diameter tolerance(mm) |
±1 |
||||||||
Length tolerance(mm) |
±2 |
2.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 |
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 |
3.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 |
B-2 |
<1% |
≥60 |
≥12 |
≥15000 |
M+C |