URSSA 42Cr Mo4. Good bonus

Hardenable steel with high hardness to automotive, aerospace and machinery: shafts, gears, connecting rods, crankshafts.

More details

Soldering:  Good
Folded:  Not admitted
Transformation:  Excellent
Mechanization:  Excellent

General specifications*

C 0,37-0,43. Mn 0,60-0,90. Si 0,15-0,40. P ≤ 0,025. S ≤ 0,035. Cr 0,85-1,15. Mo 0,15/0,26.
Rm900/1100 N/mm2. ReH700 N/mm2. A 10 %. Dureza Brinell300/344Hb.

Typical applications

Typically used for parts, treated, requiring a higher hardness. They are achieved by oil quenching until 45/58HRC and 160/200Kg/m. Some applications are for automotive industry and aeronautics: gear assembly, connecting rods, pieces that require induction hardening to get high requests.


Soldering steel to appropriate soldering process. It requires a controlled preheating and cooling, considering warm reduction tensions treatments after soldering.


Good. If accurate oxyfuel stabilizer or annealed after the torch cutting of parts.

Approximate equivalences

CENIM:  F-1252/40 Cr Mo 4
SAE/AISI:  4140
BS:  En 19
UNI:  41 Cr Mo 4

Thermal processes

Preheating680 - 720 ºCOven
Normalize890 - 870 ºCAir
Warm up890 - 1000 ºCOil
Drawn Stainless500 - 650 ºCAir
Stock Program
  • Check our stock in the warehouse for each supply, as if delivery period for formats not available.
  • We also serve parts of sheet, cut in multiples lengths of 1000mm maintaining the width.
  • Oxycut of tailor-made pieces from 8 to over than 500 mm thickness.

* The specifications are illustrative. For each supply we offer a certificate with the datum of the shipment delivered.

Ask for information

Ask us for more information and advice on URSSA 42Cr Mo4 Steel.

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Oxycut on demand

Oxycut on demand

We cut your steel plates starting from your plans with absolute accuracy. An added service which allows collecting the product ready to be used.

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Special steel plates

Special steel plates

Wide stock in steel plates with a thickness ranging from 1.5mm to 400mm and different types. Ask us for more information.

steel sheet corten

Steel sheet corten

Wide range of thicknesses, from 1mm to 80mm thickness. Oxcut custom made from 8mm to more than 500mm thick