30HGS

TOUGHENING AND STRUCTURAL ALLOY STEEL

NORM: PN-89/H-84030/04

APPLICATION:

Steel adjusted for loaded spindles, pins, gears, levers; parts of clouth, gear train, flanges and bushings, for high toughness components such as axles and shafts; compressor vane and aircraft structure pipes.

MECHANICAL PROPERTIES:

Property	Symbol	Unit	After heat treatment
Ultimate tensile strength	Rm	MPa	≥ 1080
Yield stress	Re (Rp0,2)	MPa	≥ 830
Elongation	A	%	≥ 10
Reduction of area	Z	%	≥ 45
Impact energy	KV	J	≥ 45

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 – 850)
	Rolling		+	(1230 – 840)
Treatment	Heat treatment	Quenching	+	860-880/o
		Tempering	+	500 – 650
	Precipitate strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Normalising	+	(870 – 890)
		Soft annealing	+	(680 – 720)
Thermochemical treatment	Carburising		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: