42CRMO4

Grade Introduction:
We are 42CrMo4 Round Bar manufacturers and manufacture a vast range of sizes and use only from prime quality billets and blooms as raw material. The range of products of 42CrMo4 Round Bar which we offer to our customers are of high quality and these round bars are used for making machinery and OEM Auto components. These products have been made keeping in mind the quality parameters that have been set by the industry in the market.

42CrMo4 Steel Round Bars are always supplied with the test certificates and can be supplied in bulk quantity as well as retail quantity as per customers’ requirements. 42CrMo4 round bars are supplied by us to various engineering and forging industries. 42CrMo4 Alloy Steel – SAE-AISI 4140 is classified as low alloy steel. Medium carbon steels are high-strength steels that include EN19 as an important member in the low alloy category. These steels show a positive response to a variety of heat treatments. 42CrMo4 is a 1% chromium – molybdenum medium hardenability general purpose high tensile steel – generally supplied hardened and tempered in the tensile range of 850 –1000 Mpa (condition T). 42CrMo4 Alloy steel is a high quality, high tensile alloy steel usually supplied readily machinable in ‘ T’ condition, giving good ductility and shock resisting properties combined with resistance to wear. We specialize in the supply of EN19, 4140, 42CrMo4 Hot Rolled Steel Round Bars.

Grade Application

42CrMo4 alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pin chock under the high pressure, parts for power train applications, cold formed fastener components, shafts, gears, drill collars for the oil exploration, etc.

Equivalent Grades

AISI 4140, SAE 4140, 42CrMo4, 42CrMoS4, Din 1.7225

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Mechanical Properties

Size Ø mm
Yield stress
Rp0.2,N/nn2, min
Ultimate tensile Stress,
Rm,N/nn2
Elongation
A5,%, min
Hardness HB
Toughness
KV, Joule, min.
<40
750
1000-1200
11
295-355
35 at 20 °C
40-95
650
900-1100
12
265-325
35 at 20 °C
>95
550
800-950
13
235-295
35 at 20 °C

Heat Treatment

42CrMo4 is alloy steel for quenching and tempering, which has a good combination of strength and toughness in the quenched and tempered condition. After the oil quenching, the steel will be hardened up to ø60 mm bar diameter. The microstructure of larger dimensions is not a fully martensite.

Tempering

Heat to 205-649°C, then cools in water or oil. normal delivery hardness 18-22 HRC.

Forging Properties

42CrMo4 is forged at 926 to 1205°C.

Stress Reliving

450-650°C

Annealing

  • Heat steel 42CrMo4 forged steel slowly and thoroughly to 800-850°C.
  • Cool slowly in the furnace to the temperature 480°C.
  • Complete annealing the steel in the air.

Normalizing

840-880 °C

Density

7.85kg/m3 Tensile strength: 655 MPA

Chemical Composition

The following table shows the chemical composition of 42CRMo4 steel:

Element
C
Si
Mn
P
S
Cr
Mo
Content(%)
0.38-0.45
0.40 max
0.60-0.90
0.035 max
0.035 max
0.90-1.20
0.15-0.30

Hardness

295 – 355

Hardening

First quenching heated slowly to 880°C, Then after adequate soaking at this temperature quench in oil or water. Temper as soon as tools reach room temperature. Second quenching heat to 780-820°C, then quenching in oil or water.

Physical Properties

Quantity
Value
Unit
Thermal expansion
10 – 10
e-6/K
Thermal conductivity
25 – 25
W/m.K
Specific heat
460 – 460
J/kg.K
Melting temperature
1450 – 1450
°C
Density
7700 – 7700
kg/m3
Resistivity
0.55 – 0.55
Ohm.mm2/m

Thermal Properties

Thermal conductivity: 0,42 kW/(cm*K)

Machinability

42CrMo4 alloy steel has good machinability in the annealed condition.

Welding

Engineering steel 42CrMo4 has only limited weldability. Preheating to 200-300°C is strongly recommended; the upper limit should not be exceeded because of the risk for deterioration of the chrome layer. Alloy steel 42CrMo4 can be friction welded. However, precautions are necessary so as to limit the formation of undesirable microstructures in the welded zone.

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

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Addition to other grades

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.