Quality	C45	C45E – C45R
Category	Special steel, carbon steel	Special steel, carbon steel
Standard ref.	EN 10083	EN 10083
Werkstoff nr.	1.1191	1.1201

Description

Among the hardening and tempering special steels, C40E and C40R are the most commonly used steels in Italy, and used to produce a vast range of mechanical components: axles, shafts, gears, pins, flanges etc. They are normally supplied as rolled bars and forged bars, though it is not uncommon to find these special steels supplied as drawn bars and peeled bars.

Chemical composition C45E (%)

C		Mn		P		S	Cr	Si	Mo	Ni	Cr+Ni+Mo
min	max	min	max	min	max	max	max	max	max	max	max
0,42	0,50	0,50	0,80	–	0,040	0,025	0,40	0,40	0,10	0,40	0,63

Chemical composition C45R (%)

C		Mn		P		S	Cr	Si	Mo	Ni	Cr+Ni+Mo
min	max	min	max	min	max	max	max	max	max	max	max
0,42	0,50	0,50	0,80	0,020	0,040	0,025	0,40	0,40	0,10	0,40	0,63

Mechanical characteristics C45E e C45R

		Hot rolled normalized (Ø of the specimen in mm)
		≤ 16	> 16 ≤ 100	> 100 ≤ 250
Yield Limit, Rp0,2 (MPa) min		340	305	275
Tensile Strength Rm (MPa)	min	620	580	560
	max	785	770	760
Elongation A (%) min		14	16	16
Resilience Kv (J) min		28	20	18
Hardness HB	min	185	175	165
	max	245	235	230

Matches table C45E e C45R

Italiy (UNI)	Europe (EN)	Germany (DIN)	France (AFNOR)	United Kingdom (BS)	USA (AISI/SAE)
C45	C45E – C45R	Ck45 – Cm45	XC48H1 – XC48H1u	080M46	1045