TOUGHENING NON-ALLOY QUALITY STEEL

NORM: PN/EN 10083-2

APPLICATION:

Steel susceptible to the parts averagely exposed on loadings and more resistant to abrasion. Such as: wheels, rims, toothed shafts, cylinders, shafts, axles, pins, eccentrics; for springs lightly exposed on loadings, etc.

TECHNOLOGICAL INFORMATION:

After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.

SEMI-FINISHED PRODUCTS:

After soft annealing, steel becomes machinable; if normalised and soft annealed, steel becomes adjusted for the mechanical cutting.

CHEMICAL COMPOSITION:

CMnSiPSCrNiMoVWTiCuInne
0,52 - 0,600,60 - 0,90Max 0,40Max 0,045Max 0,045Max 0,40Max 0,40Max 0,10----Cr+Mo+Ni max 0,63

MECHANICAL PROPERTIES:

Effect of the cross-section on mechanical properties
If heat treated
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 800 – 950 750 – 900 700 – 850
Yield stress Re (Rp0.2), MPa ≥ 550 ≥ 490 ≥ 420
Elongation, A, % ≥ 12 ≥ 14 ≥ 15
Reduction of area, Z, % ≥ 30 ≥ 35 ≥ 40
If normalised
Diameter, d, mm

Thickness of the flat bar t, mm

≤ 16

≤ 8

16 – 100

8 – 100

100 – 250

100 – 250

Ultimate tensile strength, Rm, MPa ≥ 680 ≥ 640 ≥ 620
Yield stress Re (Rp0.2), MPa ≥ 370 ≥ 330 ≥ 300
Elongation, A, % ≥ 11 ≥ 12 ≥ 12

Technological treatment processes:

Technological treatment processes Possible application Temperature, °C
Hot forming Forging + (1050 – 850)
Rolling + (1050 – 850)
Treatment Heat treatment Quenching + 810-850/w,o
Tempering + 550 – 660
Precipitation strengthening Supersaturation
Ageing
Annealing Normalising + 825 – 885
Soft annealing + (650 – 700)
Thermochemical treatment Carburising
Other

INTERNATIONAL STEEL GRADES:

ISO EN Russia
~C55 ISO 683-1 1987 C55 EN 10083-2 1996 ~ 55 GOST 1050 1988
US Japan China
~ M 1055 ASTM A 29-93 ~S 55 C JIS G 4051 1979 ~ 55 GB 699-88