36HNM/1.6511/36CrNiMo4

TOUGHENING STEEL

NORM: PN/EN 10250-3

APPLICATION:

Steel susceptible to very loaded shafts, crankshafts, connecting-rods, pump and press, control parts, steam turbine shafts and rings.

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		1100–1300
Yield stress		Re (Rp0.2)		MPa		≥ 900
Elongation		A		%		≥ 10
Reduction of area		Z		%		≥ 45
Impact energy		KV		J		≥ 35
Effect of the cross-section on mechanical properties
Diameter d, mm Flat product thickness 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	≥ 800		≥ 700		≥ 600		≥ 550
A, %	≥ 11		≥ 12		≥ 13		≥ 14
Z, %	≥ 50		≥ 55		≥ 60		≥ 60
KV, J	≥ 40		≥ 45		≥ 45		≥ 45

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 – 850)
	Rolling		+	(1050 – 850)
Treatment	Heat treatment	Quenching	+	820-850/w,o
		Tempering	+	540 – 680
	Precipitation strenghtening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Normalising	+	(850 – 880)
		Softening	+	(650 – 700)
Thermochemical treatment	Carburising		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: