C45/1.0503

CARBON TOUGHENING STEEL

NORM: PN/EN 10083-2

APPLICATION:

Steel susceptible to the parts averagely exposed on loadings and more resistant to abrasion. For the parts such as: axles, crankshafts, spindles, discs, pump rotors, 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.

MECHANICAL PROPERTIES:

Effect of the cross-section on mechanical properties
If heat treated
Diameter d, mm Thickess of the flat bar t, mm	≤ 16 ≤ 8	16–40 8–20	40–100 20–60
Ultimate tensile strength Rm, MPa	700–850	650–800	630–780
Yield stress Re (Rp0.2), MPa	≥ 490	≥ 430	≥ 370
Elongation, A, %	≥ 14	≥ 16	≥ 17
Reduction of area, Z, %	≥ 35	≥ 40	≥ 45
If normalised
Diameter, d, mm Thickness of the flat bar t, mm	≤ 16 ≤ 16	16–100 16–100	100–250 100–250
Ultimate tensile strength Rm, MPa	≥ 620	≥ 580	≥ 560
Yield stress Re (Rp0.2), MPa	≥ 340	≥ 305	≥ 275
Elongation, A, %	≥ 14	≥ 16	≥ 16

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1100 – 850)
	Rolling		+	(1100 – 850)
Treatment	Heat treatment	Quenching	+	820-860/w,o
		Tempering	+	550 – 660
	Precipitation strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Normalising	+	840 – 900
		Soft annealing	+	(650 – 700)
Thermochemical treatment	Carburising		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: