Grade 42CrMo4 Carbon Steel Seamless Tubes

Grade 42CrMo4 Carbon Steel Seamless Tubes

42CrMo4 alloy steel -SAE-AISI 4140 is a low alloy steel. Medium carbon steel is a high strength steel, of which EN19 is

An important member of the low alloy category. These steels show a positive response to various heat treatments. 42CrMo4 is one

1% chrome-molybdenum medium hardenability general purpose high-strength steel - usually in the tensile range of 850-1000 Mpa (condition T)

Perform quenching and tempering. 42CrMo4 alloy steel is a high quality, high strength alloy steel that is usually easy to supply

Process. Under T' condition, it has good ductility, seismic performance and wear resistance. We specialize in the supply of EN19.

4140, 42CrMo4 hot rolled round steel.

Grade application:

42CrMo4 alloy steel is widely used in engineering steel applications, such as: manufacturing a variety of machinery, automobiles, mining parts, engines

Gear, supercharger drive gear, connecting rod, high pressure pin bearing seat, power train application parts, cold-formed fasteners

Parts, shafts, gears, drill collars for petroleum exploration, etc.

Equivalent credits:

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

Hardness:

295-355

Heat treatment:

42CrMo4 is a tempering alloy steel, which has a good combination of strength and toughness in the tempering state. After oil quenching, the steel will harden to ø60 mm bar diameter. Larger microstructures are not complete martensite.

Hardening:

First quenching slowly heated to 880°C, and then fully soaked at this temperature after quenching in oil or water. Temper tools as soon as they reach room temperature. The second quenching is heated to 780-820°C and then quenched in oil or water.

Temper:

It is heated to 205-649°C and then cooled in water or oil. Normal delivery hardness 18-22 HRC

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

Forging performance:

42CrMo4 is forged at 926 to 1205°C.

Stress Relief:

450-650°C

Standardization:

840-880 ℃

Annealing:

Heat 42CrMo4 forged steel slowly and thoroughly to 800-850°C;

Slow cooling in the furnace to 480℃;

The steel is annealed in air.

Density:

7.85kg/m3 Tensile strength: 655MPA

Machinability:

42CrMo4 alloy steel has good machinability in annealed state.

Welding:

Engineering steel 42CrMo4 has limited weldability. Preheating to 200-300°C is highly recommended; The upper limit should not be exceeded due to the risk of deterioration of the chromium layer. Alloy steel 42CrMo4 can be friction welded. However, precautions must be taken to limit the formation of undesirable microstructure in the welding zone.

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Application fields

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