Products

50CrMo4 - Nr.1.7228

Steel similar to the above, but with a higher carbon content. It is used for the same purposes, when a surface hardness obtained by induction tempering is also necessary.

References and Comparable Standards

Standard Reference: EN ISO 683-2: 2018 (Hot-rolled products) | EN 10277: 2018 (Bright products)

EUROPE		ITALY	GERMANY		FRANCE	UK	USA
EN 10083-3: 2006		(UNI 7845-78)	(DIN 17200-86)		(NF A 35-552-86)	(BS 970 pt.3-96)	ASTM A 29
Grade	N°		Werkstoff	N°
50CrMo4	1.7228	-	50CrMo4	1.7228	-	-	4150

Chemical Composition (Cast Analysis) (%)

C	Si	Mn	P/max	S	Cr	Mo	Cu/max	Al
0,46÷0,54	0,10÷0,40	0,50÷0,80	0,025	0,020÷0,035	0,90÷1,20	0,15÷0,30	0,40	0,020÷0,050

Mechanical Properties - As Rolled Condition

Size (mm)	Treated to improve shearability (+S)	Soft annealing (+A)	Quenched and tempered (+QT)
Size (mm)	HB max to condition		Rp0,2 (MPa) min	Rm (MPa) min	A5 (%) min	Z (%) min	KV (J) min
d≤16	where the shearability is of importance, this steel should be ordered in the “soft annealed” condition	248	900	1100÷1300	9	40	-
16<d≤40		248	780	1000÷1200	10	45	30
40<d≤100		248	700	900÷1100	12	50	30
100<d≤160		248	650	850÷1100	13	50	30
160<d≤250		248	550	800÷950	13	50	30

Mechanical Properties – Bright Steel

Size (mm)	as Rolled+Turned (+A+SH)	Quenched+Tempered+Turned (+QT+SH)*				Quenched+Tempered+Cold Drawn (+QT+C)			as Rolled+Cold Drawn(+A+C)
Size (mm)	Hardness HB max	Rp0,2 (MPa) min	Rm (MPa) min	A5 (%) min	KV (J) min	Rp0,2 (MPa) min	Rm (MPa)	A5 (%) min	Hardness HB max
5≤d≤10	-	-	-	-	-	770	1000÷1200	6	315
10<d≤16	-	-	-	-	-	750	1000÷1200	7	305
16<d≤40	248	780	1000÷1200	10	30	720	1000÷1200	7	300
40<d≤63	248	680	900÷1100	12	30	680	900÷1200	8	295
63<d≤100	248	650	900÷1100	12	30	650	900÷1200	8	295

*This values are valid also for Cold Drawn - Quenched + Tempered Condition (+C +QT)
For size <5 mm the mechanical properties may be agreed at the time of enquiry and order

Working Temperatures Recommended

Operation	°C
Hot forgings deformation	850÷1150
Isothermal annealing	820÷860-->640
Soft annealing	680÷720
Quenching in water or oil	820÷860
Tempering	540÷680

Hardness Limits (Jominy Test)

Limits of range		Hardness HRC at a distance from quenched end of test pieces (mm)
Limits of range		1,5	3	5	7	9	11	13	15	20	25	30	35	40	45	50
+H	Max	65	65	64	64	63	63	63	62	61	60	58	57	55	54	54
+H	Min	58	58	57	55	54	53	51	48	45	41	39	38	37	36	36
+HH	Max	65	65	64	64	63	63	63	62	61	60	58	57	55	54	54
+HH	Min	60	60	59	58	57	56	55	53	50	47	45	44	43	42	42
+HL	Max	63	63	62	61	60	60	59	57	56	54	52	51	49	48	48
+HL	Min	58	58	57	55	54	53	51	48	45	41	39	38	37	36	36