1.6580/30CrNiMo8

TOUGHENING STEEL

NORM: PN/EN 10083-3

APPLICATION:

Steel susceptible to very loaded axles, shafts, crankshafts, gears. Also adjusted for the parts which are exposed on variable movements bending, twisting, wearing, tear 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.

MECHANICAL PROPERTIES:

Mechanical properties of a product with diameter d ≤ 16 mm
Property		Symbol		Unit		After heat treatment
Ultimate tensile strength		Rm		MPa		1250 – 1450
Yield stress		Re (Rp0,2)		MPa		≥ 1050
Elongation		A		%		≥ 9
Reduction of area		Z		%		≥ 40
Impact energy		KV		J		≥ 30
The influence of the element’s 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	1250 – 1450		1000 – 1300		1000 – 1200		900 – 1100
Re (Rp0,2), MPa	≥ 1050		≥ 900		≥ 800		≥ 700
A, %	≥ 9		≥ 10		≥ 11		≥ 12
Z, %	≥ 40		≥ 45		≥ 50		≥ 50
KV, J	≥ 30		≥ 35		≥ 45		≥ 45

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 – 850)
	Rolling		+	(1180 – 850)
Treatment process	Heat treatment	Quenching	+	830-860/w,o
		Tempering	+	540 – 660
	Precipitate strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Normalising	+	(850 – 880)
		Soft annealing	+	(650 – 700)
Thermochemical treatment	Carburising		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: