C45U/1.1730

CARBON TOOL STEEL

NORM: ISO 4957

APPLICATION:

Steel susceptible to simple manual tools, cold heading dies, die casting tools, hand tools, tongs, agricultural tools, blanking tools, axes, anvil cutters, ordinary and blacksmith’s hammers, anvils and auxiliary blacksmith’s tools.

MECHANICAL PROPERTIES:

Hardness after	Tempering ºC	Symbol	Value
Soft annealing	–	HB	≤207
Quenching with 810 ºC in water	–	HRC	54
Quenching with 810 ºC in water and tempering	180	HRC	≥54
	200	HRC	54
	250	HRC	52
	300	HRC	48
	350	HRC	45
	400	HRC	42
	450	HRC	39
	500	HRC	35

PHYSICAL PROPERTIES:

Property	Unit	Value
Density, ρ	g*cm-3	7.85
Thermal expansion, α20-100ºC)	K-1	11.65*10-6
Thermal conductivity, λ20ºC)	W*m-1*K-1	49.4

Technological treatment processes:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	1100-850
	Rolling		+	1100-850
Treatment	Heat treatment	Quenching	+	800-820
		Tempering	+	170-190
	Precipitation strengthening	Supersaturation	–	–
		Ageing	–	–
	Annealing	Soft annealing	+	680-710
		Stress relieving	+	600-700
Thermochemical treatment	Nitriding		–	–
	Other		–	–

INTERNATIONAL STEEL GRADES: