440C properties

JIS	AISI	WNr	DIN
-	440C	-	1.4125

CHEMICAL COMPOSITION(Typical Analysis %)

C	Si	Mn	Cr	Ni	Mo
1.05	0.30	0.40	17.00	0.20	0.50

STEEL PROPERTIES

Hardenable stainless tool steel. High wear resistance

PHYSICAL PROPERTIES

Thermal coductivity W/(m.K) 20°C/15

Coefficient of linear thermal expansion

10^-1 °C^-1	20-100°C	20-200°C	20-300°C	20-400°C	20-500°C	20-600°C	20-700°C
10^-1 °C^-1	9.8	10.8	11.4	11.7	12.0	12.2	12.4

APPLICATIONS

High quality cutting components. surgical instruments, small stainless ball bearings

HEAT TREATMENT

SOFT ANNEALING(°C)	COOLING	HARDNESS (HB)
710-740	FURNACE	MAX. 230

HARDENING FROM(°C)	IN	HARDNESS AFTER QUENCHING (HRC)
1000-1050	OIL, AIR	MIN. 58

TEMPERING (°C)	100	200	300	400	500	600	700
HARDNESS (HRC)	59	57	54	55	55	39	31

440C