TOUGHENING STEEL

NORM: PN/EN 10083-3

APPLICATION:

Steel susceptible to very loaded axles, shafts, crankshafts. Also subject to variable bending and torsional loads, gears, , etc.

TECHNOLOGICAL INFORMATION:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

SEMI-FINISHED PRODUCTS:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

CHEMICAL COMPOSITION:

CMnSiPSCrNiMoVWTiCuInne
0,38 - 0,450,60 - 0,90Max 0,40Max 0,025Max 0,0350,90 - 1,20-0,15 - 0,30-----

MECHANICAL PROPERTIES:

Mechanical properties of a product with diameter d ≤ 16 mm
Property Designation Unit After heat treatment
Ultimate tensile strength Rm MPa 1100-1300
Yield stress Re (Rp0,2) MPa ≥ 900
Elongation A % ≥ 10
Reduction of area Z % ≥ 40
Impact energy KV J ≥ 30
Effect of the cross-section on mechanical properties
Diameter d, mm

Thickness of the flat bar t, mm

16 – 40

8 – 20

40 – 100

20 – 60

100 – 160

60 – 100

160 – 250

100 – 160

Rm, MPa 1000 – 1200 900 – 1100 800 – 950 750 – 900
Re (Rp0.2), MPa ≥ 750 ≥ 650 ≥ 550 ≥ 500
A, % ≥ 11 ≥ 12 ≥ 13 ≥ 14
Z, % ≥ 45 ≥ 50 ≥ 50 ≥ 55
KV, J ≥ 35 ≥ 35 ≥ 35 ≥ 35

Technological treatment processes:

Technological treatment processes Possible application Temperature, °C
Hot forming Forging + (1050 – 850)
Rolling + (1180 – 850)
Treatment Heat treatment Quenching + 82–860/w,o
Tempering + 540 – 680
Precipitation strengthening Supersaturation
Ageing
Annealing Normalising + (840 – 880)
Soft annealing + (680 – 720)
Thermochemical treatment Carburising
Other

INTERNATIONAL STEEL GRADES:

ISO EN Russia
42CrMo4 ISO 683-1 1987 42CrMo4 EN 10083-1 1996 ~ 38ChM GOST 4543 1971
US Japan China
~ 4140 H ASTM A 193-96 ~SCM4 JIS G 4105 1979 ~ 42CrMo GB 3077-88