ASTM4140 Scm440 42CrMo Cold Drawn Alloy Bar - Annealed, Heat Treated
4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.
1.Equivalent Grade of AISI 4140
| GB,YB |
JIS |
DIN(W-Nr.) |
ASTM |
BS |
NF |
| 42CrMo |
SCM440/(SCM4) |
42CrMo4-1.7225 |
4140 |
708M40/709M40/708A42/EN19 |
42CD4 |
2.Supply Size range
Hot Rolled 4140 steel bar: Ø16mm-310mm
Forging 4140 steel bar: Ø250mm-1000mm
Cold drawn 4140 steel bar:Ø12-100mm
Q&T 4140 steel bar:Ø16-310mm
3.Applications of AISI 4140 Steel
DIN 4140 steel is a alloy structural steel, 4140 is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,4140 can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc
4.AISI 4140 equivalent Steel Chemical Composition:
| ASTM A29/29M |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 4140 |
0.38~0.43 |
0.15~0.35 |
0.75~1.00 |
0.80~1.10 |
0.15~0.25 |
≤0.035 |
≤0.040 |
| DIN WN-r |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 1.7225 |
0.38~0.45 |
≤0.40 |
0.60~0.90 |
0.90~1.20 |
0.15~0.30 |
≤0.035 |
≤0.035 |
| GB/T |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 42CrMo |
0.38~0.45 |
0.17~0.37 |
0.50~0.80 |
0.90~1.20 |
0.15~0.25 |
≤0.030 |
≤0.030 |
| BS |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
| 708M40 |
0.36~0.44 |
0.10~0.35 |
0.70~1.00 |
0.90~1.20 |
0.15~0.25 |
≤0.035 |
≤0.035 |
| JIS |
C |
Si |
Mn |
Cr |
Mo |
P |
S |
| SCM440 |
0.38~0.43 |
0.15~0.35 |
0.60~0.85 |
0.90~1.20 |
0.15~0.30 |
≤0.030 |
≤0.030 |
5.Heat treatment of AISI 4140 steel
Annealing
AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
Tempering
AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has lower tempering temperature. For example, tensile strength of 225 ksi cab be achieved by tempering at 316°C (600°F), and a tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
Hardening
AISI 4140 alloy steel can be hardened by cold working, or heating and quenching.
6.Payment terms: T/T or L/ C
(1)30% paid by T/T and rest 70% by T/T upon the copy of B/B.
(2)100% irrevocable L/C at sight
7.MOQ:5tons
8.Delivery time:7-30 days upon to the order details
9.Trade term: FOB CFR CIF
10.Port of loading:Qingdao , China
11. Mark: including steel material, heat No., pieces, weight, date and so on.
12.Quality control:
We company have good QC inspection tear and full set of inspect equipment including: UT test machine, Tensile testing machine,Hardness testing machine,Dimensional measuring instrument,f,spectrometer,Metallographic microscope and so on, so that we can always supply good mateterials for various projects and industries ,
ASTM4140 Scm440 42CrMo Cold Drawn Alloy Bar - Annealed, Heat Treated
ASTM4140 Scm440 42CrMo Cold Drawn Alloy Bar - Annealed, Heat Treated
ASTM4140 Scm440 42CrMo Cold Drawn Alloy Bar - Annealed, Heat Treated
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