Mat.No. 1.7227, DIN 42CrMoS4, AISI 4140

Mat.No. 1.7227, DIN 42CrMoS4, AISI 4140

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Designation by Standards Brand Name Ravne No. Mat. No. DIN EN AISI 42CRMOS4 792 1.7227 42CrMoS4 42CrMoS4 4140 Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.41 max. 0.40 0.75 1.05 0.28 - - - - DescriptionSpecial structural steel. ApplicationsHigh and moderately stressed components for automobile industry and mechanical engineering – shafts, connecting rods, crankshafts, screws, etc. Physical properties (avarage values) at ambient temperatureModulus of e...


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Designation by Standards

Brand Name Ravne No. Mat. No. DIN EN AISI
42CRMOS4 792 1.7227 42CrMoS4 42CrMoS4 4140

Chemical Composition (in weight %)

C Si Mn Cr Mo Ni V W Others
0.41 max. 0.40 0.75 1.05 0.28 - - - -

Description
Special structural steel.

Applications
High and moderately stressed components for automobile industry and mechanical engineering – shafts, connecting rods, crankshafts, screws, etc.

Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210 
Density [g/cm3]: 7.80

Soft Annealing
Heat to 680-720oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.

Normalizing
Temperature: 840-880oC.

Hardening
Harden from a temperature of 820-860oC followed by oil or water quenching.

Tempering
Tempering temperature: 540-680oC.

Mechanical Properties in Quenched and Tempered Condition

Diameter (mm) 0.2 proof stress (N/mm2) Tensile stregth (N/mm2) Elongation (%) Reduction (%) Impact energy (J)
Up to 16 900 1100-1300 10 40 30
17-40 750 1000-1200 11 45 35
41-100 650 900-1100 12 50 35
101-160 550 800-950 13 50 35
161-250 500 750-900 14 55 35

Hardenability in the end-quench test
Quenching temperature in the end-quench test is 850oC

Hardness 1.5 3 5 7 9 11 13 15 20 25 30 35 40 45 50
H max. 61 61 61 60 60 59 59 58 56 53 51 48 47 46 45
H min. 53 53 52 51 49 43 40 37 34 32 31 30 30 29 29
HH max. 61 61 61 60 60 59 59 58 56 53 51 48 47 46 45
HH min. 56 56 55 54 52 48 46 44 41 39 38 36 36 35 34
HL max. 58 58 58 57 56 54 53 51 49 46 44 42 41 40 40
HL min. 53 53 52 51 49 43 40 37 34 32 31 30 30 29 29

Forging
Hot forming temperature: 1050-850oC. 

Machinability
No data.

Forms manufactured: Please see the Dimensional Sales Program. 

Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.

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