AISI 4140 Cold Rolled Annealed Round Bar / SAE 4140 Cold Drawn Steel Bar
Cold drawn steel bar is made from special quality hot rolled steel bar. It is drawn through a die reducing the cross-sectional area of the bar and giving it a smooth surface.
- Shapes: According to the shapes of the die, the finished product can get a round, hexagonal, square, flat and other cross section.
- Advantage: Cold drawn bars have greater size accuracy, straightness and increased tensile and yield strength as well as improved machinability.
- Further processing: In addition to standard cold drawn steel bars. It can also be polished or ground to get better surface.
1.Cold Drawn Steel Bar Processing:
Production line: 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.Application: hardware tools, auto parts, standard parts, fasteners common shaft, machinery manufacturing, light industry, hardware, bicycles, cars, motorcycles, textile machinery, transformers and other machinery industry
3.Capabilities of our fatcory
| Shapes |
Sizes |
Processing |
| Steel Round Bar |
5mm to 63.5mm |
Cold Drawn |
| Steel Round Bar |
63.5mm-120mm |
smooth-turned and polished. |
| cold drawn steel square bar |
5*5mm to 120*120mm |
Cold Drawn |
| cold drawn steel hex bar |
5mm to 120mm |
Cold Drawn |
| cold drawn steel hexagonal bar |
5mm to 120mm(side to side) |
Cold Drawn |
4.Equivalent grades and chemical composition of steel 4140
| 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 |
5.Advantages of cold drawn steel bar:
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.
6.Packing Details of Cold Drawn Steel bars
1.Bundle weight not max 1000kgs.
2.One bundle only pack one size and one heat number.
3.Mark / Label will include grade, size, heat number quantity in pcs, quantity in kgs, origin and so on as required.
4.One bundle fit two lifting belt , which can help customer easy unload in destination port.
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