Products

30CrNiMo8 - Nr.1.6580

Quenched and tempered steel with high temperability and toughness thanks to the high chromium content. It can be quenched and tempered at high resistance values and offers hardness consistency and uniformity. Generally used for pinions and shafts. Has average machinability on tool machines. Can be nitrided at the quenched and tempered state to increase resistance to wear and the fatigue limit.

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°
30CrNiMo8	1.6580	-	30CrNiMo8	1.6580	30NCD8	-	4340

Chemical Composition (Cast Analysis) (%)

C	Si	Mn	P/max	S/max	Cr	Mo	Ni	Cu/max	Al
0,26÷0,34	0,10÷0,40	0,50÷0,80	0,025	0,035	1,80÷2,20	0,30÷0,50	1,80÷2,20	0,40	0,020÷0,050

Mechanical Properties - As Rolled Condition

Size (mm)	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	248	850	1030÷1230	12	40	-
16<d≤40	248	850	1030÷1230	12	40	30
40<d≤100	248	800	980÷1180	12	45	35
100<d≤160	248	800	980÷1180	12	50	45
160<d≤250	248	750	930÷1130	12	50	45

Mechanical Properties – Bright Steel

Size (mm)	as Rolled+Turned (+A+SH)	Quenched+Tempered+Turned (+QT+SH)*
Size (mm)	Hardness HB max	Rp0,2 (MPa) min	Rm (MPa) min	A5 (%) min	KV (J) min
5≤d≤10	-	-	-	-	-
10<d≤16	-	-	-	-	-
16<d≤40	248	850	1030÷1230	12	30
40<d≤63	248	800	980÷1180	12	35
63<d≤100	248	800	980÷1180	12	35

*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	800÷1100
Isothermal annealing	800÷900-->650
Normalizing	850÷880
Quenching in oil or water	830÷860
Tempering	550÷660

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	56	56	56	56	55	55	55	55	55	54	54	54	54	54	54
+H	Min	48	48	48	48	47	47	47	46	46	45	45	44	44	43	43
+HH	Max	56	56	56	56	55	55	55	55	55	54	54	54	54	54	54
+HH	Min	51	51	51	51	50	50	50	49	49	48	48	47	47	47	47
+HL	Max	53	53	53	53	52	52	52	52	52	51	51	51	51	50	50
+HL	Min	48	48	48	48	47	47	47	46	46	45	45	44	44	43	43