alloy steel grade 10.9 alloy steel grade 4140
Alloy steel 4140,hot rolled heat treated round bar
AISI 4140 SCM440 42CrMo Cold drawn steel bar steel shafts
- AISI4140 cold drawn steel bar
CD 4140 / 4142 alloy bar's chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. This alloy responds well to heat treatment. In the annealed condition it machines at 110 sfm. It also has good wear resistance, toughness, and good ductility in the quenched and tempered condition. This grade can also be supplied as turned ground and polished for tighter dimensional tolerances for bearing fitting applications.
2.AISI 4140 Cold drawn steel bar Typical applications
Typical applications are highly stressed parts or parts subject to severe wear..
3.AISI 4140 cold drawn steel bar main type and avaliable sizes
| Round bars |
5mm-130mm |
| Suqare bar |
6*6mm-100*100mm |
| Flat bars |
3mm*20mm-50mm*100mm |
| Hex bars |
6mm-100mm |
| Bar Finsihe |
Peeled, Cold Drawn, TurnedTurned & Polished, Centreless Ground |
4.AISI 4140 Cold drawn steel bar size tolerance
h9,h10,h11 or other tolerance according to client's requirement
5.AISI 4140 Cold drawn steel bar chemical composition(%)
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| 42CrMo4 |
0.38-0.45 |
0.17-0.37 |
0.40-0.70 |
≤0.035 |
≤0.035 |
0.90-1.20 |
0.15-0.25 |
| 1.7225 |
0.38-0.45 |
≤0.40 |
0.60-0.90 |
≤0.025 |
≤0.035 |
0.90-1.20 |
0.15-0.30 |
| 4140 |
0.38-0.43 |
0.15-0.35 |
0.75-1.00 |
≤0.035 |
≤0.040 |
0.80-1.10 |
0.15-0.25 |
6.AISI 4140 Alternative grade in different standard
| GB |
42CrMo |
| ASTM |
4140 |
| JIS |
SCM440 |
| DIN |
1.7225 |
7.AISI 4140 Typical Mechanical Properties
Grade:ASTM A29 4140 42CrMo SCM440
Hardness:217HB
Tensile strength:1080(110)MPA
Yield strength: 930(95)MPA
elogation:12% Reduction of area:45% AKV(impact value):63J
TYPICAL MECHANICAL PROPERTIES FOR ANNEALED
| Tensile Strength |
723 - 830Mpa |
| Yield Strength |
585 - 450Mpa |
| Elongation in 2" |
15% - 25% |
| Reduction of area |
45% - 55% |
| Brinelle Hardness |
215-235HB |
TYPICAL MECHANICAL PROPERTIES FOR QT
| Tensile Strength |
890 |
| Yield Strength |
755 |
| Elongation in 2" |
16% |
| Reduction of area |
50% |
| Brinelle Hardness |
269-321 |
8.Straightness: 1mm/m(max)
9. Steel bar Packing:
*Bars from different heats will not be mixed and dispatched.
*Bars will be bundles and securely metal strapped in 3 min places of the bar length and tagged properly.
*For further processing products such as cold drawn/peeled or heat treated goods, plastics bag wrapped or pallet loading is available according to customer's demands.
10.Delivery time of steel bar:
7-10days of stock,30 days after order confirmed of new material
11.Payment term:TT or LC
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