42CrMo4, 1.7225, 42CrMoS4, 1.7227, AISI 4140 – description

Description Of 42CrMo4, 1.7225, 42CrMoS4, 1.7227, AISI 4140

42CrMo4/Aisi 4140 is structural steel, strong and hardenable. With this steel one can achieve very good properties on the whole cross-section (while quenching in oil, the max diameter is 70mm, for quenching in water it is 50mm). In the surface hardened condition in achieves a hardness of 54-59 HRC on the surface.

The alloy is primarily used for very heavily loaded medium and large parts with strength requirements exceeding the capabilities of 35HM or 34CrMo4 alloys. It is a good alternative to expensive chrome-nickel and chrome-nickel-molybdenum steels. The main applications are axles, cylinder shafts, crankshafts, connecting rods, larger spindles for machine tools, chain wheels, motor cylinders, ball pins, multi-spline shafts and other machine parts subject to varying bending and torsional loads and wear.

The steel can be gas cut with oxygen after preheating with acetylene-oxy or propane-butane-oxy flame. It is also possible to cut with a plasma jet. The material must be preheated to 300-400 °C before cutting. After cutting cool in air.

42CrMo4 – Mechanical and Physical Properties

Physical properties

  • Density: 7,83 g/cm3
  • Specific heat capacity: 0,473 kJ/(kg*K)
  • Linear expansion coefficient: 11,2 K-1
  • Thermal conductivity: 0,42 kW/(cm*K)
  • Electrical resistivity: 0,223 Ω*cm
  • Young’s modulus: 21,7 kG/mm2

Anbao Hydraulic  able to offer best 42CrMo4 cylinder tubes and rods for our customers. If you are interested in our chrome plated bars, hard chrome rod, induction hardened chrome bars.

Please contact us through below methods for more information.

Email: sales@ab-steel.com inquiry@ab-steel.com
Tel & WhatsApp & Wechat  : +8613681801718

Posted in Hydraulic Knowledges.