4140 SCM440 42CrMo4 Cold Drawn Steel Bar Round/Square/Hexagon Bar
1.Processing for Cold Drawn Steel Bars
hot rolled bars/wire rods - (spheroidizing annealed for alloy steel/bearing steel) - pickling - cleaning - saponifing - cold drawn - (softening annealed for alloy steel/bearing steel) - cutting - bundling - packing - finished products
2.The advantages of Cold Drawn Steel Bars
1.It can remove the Size and Section which provides Tighter tolerances which Reduces machining losses.
2.It can remove the Steel Surface Finish which Reduces surface machining & improves quality.
3.It can remove the Straightness which Facilitates automatic bar feeding in CNC.
4.It can increase the Mechanical Properties which Can reduce the need for hardening.
5.It can improve the Machinability and Productivity which Enables higher machining feeds, high tool life, yield & speeds and improved machined finish.
3.AISI 4140 Equivalent and chemical composition
| Standard |
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| ASTM A29 |
4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
≤ 0.035 |
≤ 0.04 |
0.8-1.1 |
0.15-0.25 |
| |
42CrMo4 |
0.38-0.45 |
≤ 0.4 |
0.6-0.90 |
≤ 0.025 |
≤ 0.035 |
0.9-1.2 |
0.15-0.30 |
| EN10083 |
1.7225 |
| JIS G4105 |
SCM440 |
0.38-0.43 |
0.15-0.35 |
0.6-0.85 |
≤ 0.035 |
≤ 0.04 |
0.9-1.2 |
0.15-0.30 |
| GB 3077 |
42CrMo |
0.38-0.45 |
0.17-0.37 |
0.5-0.80 |
≤ 0.035 |
≤ 0.035 |
0.9-1.2 |
0.15-0.25 |
| BS 970 |
EN19 |
0.35-0.45 |
0.15-0.35 |
0.5-0.80 |
≤ 0.035 |
≤ 0.035 |
0.9-1.5 |
0.2-0.40 |
4.Sizes we can offer for cold drawn steel bars
| Shapes |
Sizes |
|
|
| cold drawn steel round bar |
5mm to 120mm |
| cold drawn steel square bar |
5*5mm to 120*120mm |
| cold drawn steel hex bar |
5mm to 120mm |
| cold drawn steel hexagonal bar |
|
| 5mm to 80mm(side to side) |
5.MOQ:1ton per size
6.Delivery time : usually, 7-10 days for stocks, and one month for new production.
7.Payment term:TT or LC
8.Cold Drawn Steel Bar Packing : Rusty proof packages. Anti rusty oil painting, film wrapped inside and Nylon plastic bags wrapped outside
9.Applications for cold drawn steel bars:
Alternator Shafts, BearingsCoil, SpringsConcrete, Accessories ,Electric Motor Shafts,Fasteners,Forging Applications,Hand Tools,Hydraulic Hose Fittings,MacPherson Strut Shafts,Oil Pump Shafts,Precision Machined Parts,Printer Shafts,Roller Conveyor Axles,Shock Absorber Shafts,Shotgun & Rifle Barrels,Stabilizer Bars,Starter Motor Shafts,Steering LinkagesTransmission Shafts,Vehicle Axles,Water Pump Shafts,Wheel Spindles etc
10.Tolerance for cold drawn steel bars: h8
| Size In mm |
Tolerance In mm |
| h8 |
h9 |
h10 |
h11 |
| 6-10 |
0/-0.022 |
0/-0.036 |
0/-0.058 |
0/-0.090 |
| 10-18 |
0/-0.027 |
0/-0.043 |
0/-0.070 |
0/-0.110 |
| 18-30 |
0/-0.033 |
0/-0.052 |
0/-0.084 |
0/-0.130 |
| 30-50 |
0/-0.039 |
0/-0.062 |
0/-0.100 |
0/-0.160 |
| 50-100 |
0/-0.046 |
0/-0.074 |
0/-0.120 |
0/-0.190 |
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