SHANGHAI UNITE STEEL
One-stop Brand Service Provider For Globle Machinery And Petrochemical Enterprise And Special Steel Distributor.
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4140,42CrMo4,42CrMo,SCM440 cold drawn flat bar, cold finished bar, Thick 3-120mm; Width 4-120mm
Application
Cold Drawn steel round bar are widely used in machinery making, autombile making, railway, mine machinery, petoleum machinry, agricultural machinery and civil archtectue such as all kinds of shafts, screws, connecting rods, hardware tools, gears, standard parts, spanners fasteners, structural parts for automobile and agricultural machinery, outer and iner sleeves, rollers and balls for bearing making.
Related specification:
Standards:
| GB | JIS | DIN | ASTM |
| 42CrMo | SCM440 | 42CrMo4 | 4140 |
Chemical composition:
| Standard | Grade |
C |
Cr |
Mo |
Si |
Mn | P | S | Ni | Cu |
| ≤ | ||||||||||
| GB | 42CrMo | 0.38-0.45 | 0.90-1.20 | 0.15-0.25 | 0.17-0.37 | 0.50-0.80 | 0.035 | 0.035 | 0.30 | 0.30 |
| JIS | SCM440 | 0.38-0.43 | 0.90-1.20 | 0.15-0.30 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.030 | 0.25 | 0.30 |
| ASTM | 4140 | 0.38-0.43 | 0.80-1.10 | 0.15-0.25 | 0.15-0.35 | 0.75-1.00 | 0.035 | 0.040 | / | / |
| ENISO | 42CrMo4/1.7225 | 0.38-0.45 | 0.90-1.20 | 0.15-0.30 | ≤0.40 | 0.60-0.90 | 0.035 | 0.035 | / | / |
Size range:
Thick 3-120mm; Width 4-120mm
Length Random Length, Fixed Length, etc.
What is the Tolerance of our Round bar?
| Tolerance | H7 | H8 | H9 | H10 | H11 | F7 | F8 |
| mm | |||||||
| 6-10 | 0-0.015 | 0-0.022 | 0-0.036 | 0-0.058 | 0-0.09 | -0.013 | -0.013 |
| -0.028 | -0.035 | ||||||
| 10-18 | 0-0.018 | 0-0.027 | 0-0.043 | 0-0.058 | 0-0.09 | -0.016 | -0.016 |
| -0.034 | -0.043 | ||||||
| 18-30 | 0-0.021 | 0-0.033 | 0-0.052 | 0-0.084 | 0-0.13 | -0.02 | -0.02 |
| -0.041 | -0.053 | ||||||
| 30-50 | 0-0.025 | 0-0.039 | 0-0.062 | 0-0.1 | 0-0.16 | -0.025 | -0.025 |
| -0.05 | -0.064 | ||||||
| 50-80 | 0-0.030 | 0-0.046 | 0-0.074 | 0-0.12 | 0-0.19 | -0.03 | -0.03 |
| -0.06 | -0.076 | ||||||
| 80-120 | 0-0.035 | 0-0.054 | 0-0.087 | 0-0.14 | 0-0.22 | -0.036 | -0.036 |
| -0.071 | -0.9 |
Packing: Plastic reel shaft, and bound, iron wire frame, the paper barrel etc
Please feel free to contact us again if you have any further questions. We look forward to receiving an order from you.