TOUGHENING STEEL

NORM: PN/EN 10083-3

APPLICATION:

Steel susceptible to crankshafts, axles, gears, levers, connecting rods, connecting elements and grinding wheels

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-------

MECHANICAL PROPERTIES:

Effect of the cross-section on mechanical properties after heat treatment
Diameter d, mm

Thickness of the flat bar t, mm

≤ 16

≤ 8

16 – 40

8 – 20

40 – 100

20 – 60

Ultimate tensile strength Rm, MPa 1000 – 1200 900 – 1100 800 – 950
Yield stress Re (Rp0.2), MPa ≥ 800 ≥ 660 ≥ 560
Elongation, A, % ≥ 11 ≥ 12 ≥ 14
Reduction of area Z (%) ≥ 30 ≥ 35 ≥ 40
Impact energy, KV, J ≥ 30 ≥ 35 ≥ 35
Physical properties
Property Unit Value
Density, ρ g·cm-3 ~7.85
Thermal expansion α0-50°C K-1 ~11.3·10-6
Thermal conductivity coefficient λ0°C W·m-1K-1 ~48.5

Technological treatment processes:

Technological treatment processes Possible application Temperature, °C
Hot forming Forging + (1050 – 850)
Rolling + (1180 – 850)
Treatment Heat treatment Quenching + 820-860/w,o
Tempering + 540 – 680
Precipitation strengthening Supersaturation
Ageing
Annealing Normalising + (840 – 870)
Soft annealing + (680 – 720)
Thermochemical treatment Carburising
Other

INTERNATIONAL STEEL GRADES:

ISO EN Russia
41Cr4 ISO 683-1 1987 41Cr4 EN 10083-1 1996 ~ 40Ch GOST 4543 1971
US Japan China
~ 5140 ASTM A 322-91 ~SCr 4 JIS G 4104 1979 ~ 40Cr GB 3077-88