SHANGHAI UNITE STEEL
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4140 / 42CrMo4 / SCM440 Cold Drawn Bar , Cold Finished Steel Bar Profile
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:
Australia AS 1444-2007 4140
AMS 6378, AMS 6379 , AMS 6381B , AMS 6382 , AMS 6382G , AMS 6390 , AMS 6390A , AMS 6395
Germany DIN 17212 W.Nr. 1.7223 Type 41CrMo4
DIN 17200 1654 W.Nr 1.7225 Type 42CrMo4
DIN 17200 W.Nr 1.7227 Type CrMoS4
EN10083 11991 1.7225 42CrMo4
Great Britain BS970 1955 EN19A
BS970 Part 3:1991708M40 or 709M40 or 708 A 42
Sweden: SS 2244
France AFNOR 40 CD 4 , AFNOR 42 CD 4
Italy: UNI 38 CrMo 4 KB , UNI 40 CrMo 4 , UNI G 40 CrMo 4
USA ASTM A29A29M91 4140
ASTM A322 4140
SAE 4140, SAE J404 , SAE J412 , SAE J770 , UNS G41400
JIS G 4105 SCM440
Chemical composition:
| Grade | C | Mn | Si | Cr | Mo | S | P |
| SAE4140 | 0.38-0.43 | 0.75-1.0 | 0.15-0.35 | 0.8-1.1 | 0.15-0.25 | ≤0.040 | ≤0.035 |
| 42CrMo4 | 0.38-0.45 | 0.6-0.9 | ≤0.4 | 0.9-1.2 | 0.15-0.25 | ≤0.035 | ≤0.035 |
Do you have these Difficulties?
| Difficulties | a material that is difficult to shape or form |
| not to invest capital to replace worn out machines, retool machines or add capacity | |
| using equipment infrequently and can't justify the expense | |
| benefit from the reduced machining associated with near net shapes | |
| buying from machine shops and find the cost expensive | |
| lack the skilled labor to produce precision, high-quality parts or who can't find skilled craftsmen |
If yes,please use Precision Cold Drawn Products.
Tolerance and roughness
| Size | Standard Tolerance(inches) | Special Tolerance(inches) | Min.Corner Radii(inches) | Max.Surf.Roughness |
| 0.125-0.4375 | 0.002'' | 0.001'' | 0.015'' | 63Ra |
| 0.4375-0.75 | 0.003'' | 0.0015'' | 0.03'' | 90Ra |
| 0.75-1.5 | 0.003'' | 0.0015'' | 0.03'' | 125Ra |
| 1.5-2.5 | 0.004'' | 0.002'' | 0.03'' | 125Ra |
| 2.5-3.0 | 0.005'' | 0.0025'' | 0.03'' | 125Ra |
| 3.0-4.0 | 0.006'' | 0.003'' | 0.03'' | 125Ra |
Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property yield strength, tensile strength, elongation and hardness, forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.
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.