• Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

  • Uncompromising quality

42CrMo4 (EN 10083-3)

 

PROPERTIES AND EMPLOYEMENTS
IT IS THE MOST USED QUENCHED AND TEMPERED STEEL THANKS TO THE GREAT RELATIONSHIP CHARACTERISTICS/COSTS.
IT HAS AN ELEVATED HARDENABILITY, GOOD HEAT RESISTANCE, EXCELLENT FORGING AND GOOD MACHINABILITY WITH MACHINE TOOLS. IT CAN BE HARDENED ON THE SURFACE OR NITRITED IN ORDER TO ELEVATE THE WEAR RESISTANCE AND THE FATIGUE STRENGTH.
QUENCHED AND TEMPERED AND NITRITED GEARS CAN SUBSTITUTE THE CASE-HARDENED AND HARDENED ONES, IF THEY ARE NOT SUBMITTED TO TOO ELEVATED PRESSURE.

 

CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS

QUALITY EUROPE GERMANY FRANCE SPAIN G.B. USA
EN DIN W.n. AFNOR UNE B.S. AISI/SAE
42CrMo4 42CrMo4 42CrMo4 1,7225 42CD4 F1252 708M40 4140

CHEMICAL COMPOSITION % (EN 10083-3)

STEEL DESIGNATION CHEMICAL COMPOSITION
SYMBOLIC NUMERIC C Si
max		 Mn P
max		 S Cr Mo Ni V
42CrMo4 1,7225 0,38 ÷ 0,45 0,40 0,60 ÷ 0,90 0,025 max. 0,035 0,90 ÷ 1,20 0,15 ÷ 0,30 - -
42CrMoS4 1,7227 0,020 ÷ 0,040

CONCENTRATION LIMITS OF THE ELEMENTS THAT ARE NOT INDICATED IN THE TABLE CAN BE DEDUCED IN THE EN 10020 REGULATION.

MECHANICAL CHARACTERISTICS (EN 10083-3)

STEEL MECHANICAL CHARACTERISTICS FOR THE REDUCED SECTION (EN 10083-1:2006, ATTACHMENT A) WITH A DIAMETER (D) OF
d ≤ 16mm 16mm < d ≤ 40mm 40mm < d ≤ 100mm 100mm < d ≤ 160mm 160mm < d ≤ 250mm
SYMBOLIC NUMERIC Re min Rm A min Z min KVb min Re min Rm A min Z min KVb min Re min Rm A min Z min KVb min Re min Rm A min Z min KVb min Re min Rm A min Z min KVb min
N/mm2 % % J N/mm2 % % J N/mm2 % % J N/mm2 % % J N/mm2 % % J
42CrMo4 1,7225 900 1100 to
1300		 10 40 - 750 1000 to
1200		 11 45 35 650 900 to
1100		 12 50 35 550 800 to
950		 13 50 35 500 750 to
900		 14 55 35
42CrMoS4 1,7227

 

JOMINY HARDENABILITY (EN 10083-3)

STEEL DESIGNATION SMBOL RANGE LIMITS HRC HARDNESS MEASURED FROM THE QUENCHED END OF THE TEST TUBE (MM)
SYMBOLIC NUMERIC 1,5 3 5 7 9 11 13 15 20 25 30 35 40 45 50
42CrMo4 1,7225 +H max 61 61 61 60 60 59 59 58 56 53 51 48 47 46 45
42CrMoS4 1,7227 +H min 53 53 52 51 49 43 40 37 34 32 31 30 30 29 29

USUALLY AVAILABLE EX STOCK

M.T. COLORATION QUALITY HEAT TREATMENT SURFACE DIAMETER (mm)
42CrMo4 Quenched and tempered rolled reeled
forged turned
peeled h11 / drawn		 80-330
340-800
20-80

42CrMo4
high resistance

 Quenched and tempered rolled reeled
rolled, rough		 80-320

 

 
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Steels

Our steel always comes from the same European steelworks, which guarantee a continuity for what concerns quality. The constant quality of the supplies allows to have repetitive parameters in mechanical processing and a greater control over deformations during heat treatment.

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Machining

Precise cuttings of small and big series are guaranteed by the employement of latest generation automatic saws that were projected and realized in order to guarantee precision standards required by customers, reducing processing wastage.

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Quality

The certification and introduction of the Quality System management allowed M.T.Acciai to improve not only its efficiency, but also the quality that is offered, in order to better meet our customers’ needs.

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