AISI 4140 Chrome-Molybdenum High Tensile Steel Round Bar
AISI / SAE 4140 Hot Rolled Steel Round Bars
EN19 Alloy steel round bar / 42CrMo Round bars
AISI 4140 is a chromium-molybdenum alloy steel. The chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength. AISI 4140 chrome-molybdenum steel can be oil hardened to a relatively high level of hardness. The desirable properties of the AISI 4140 include superior toughness, good ductility and good wear resistance in the quenched and tempered condition.
1. AISI 4140 equivalent material
♦JAPAN♦ : JIS SCM440 alloy steel
♦GERMANY♦ : DIN WN-r 1.7255 / 42CrMo4 steel alloy
♦CHINA♦ : GB 42CrMo steel
♦BRITISH♦ : BS 708M40
2.Supply Size range for AISI 4140 steel bar
Hot Rolled 4140 steel bar: Ø16mm-310mm
Forging 4140 steel bar: Ø250mm-1000mm
Cold drawn 4140 steel bar:Ø12-100mm
3.AISI 4140 and equivalent grades 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.AISI 4140 Steel Bar Quality control:
1. Melting Process: EAF/BOF+LF+VD resulting in ingots
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per
SEP1921 Class C/c
5.AISI 4140 Steel Machining ability:
AISI 4140 has good machinability. Operations such as turning, hobbing, drilling, sawing, broaching, tapping and milling can be easily performed using the recommendations provided by the machine's manufacturer for ideal tool type-feeds and speeds.
6.AISI 4140 Futhur Heat Treatment we can supply:
There are various heat treatments of the AISI 4140 Chrome-Molybdenum High Tensile Steel which are:
Forging
Stress relieving
Annealing
Normalizing
Nitriding
Tempering
Flame and induction hardening
Hardening
7.Application of AISI 4140 Steel :
Shaft, Crankshaft,Bolt & fasteners,Machinery Parts, Gear, Milling Spindle, Slide, Steel Collet,Steel Converyor and Roll,Steel Ejector,Steel Piston Rod, Drill Collar,Steel Stub,axles collets guides and so on.
8.Our quality team:
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 .
9.Delivery time:
7-15 days for stocks items.
15-30 days for new production items.
10.Payment term: TT or LC.
11.MOQ:1 ton per size
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