30CrNiMo8/1.6580

EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels

EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

EN 10250-3:2000 Open steel die forgings for general engineering purposes Alloy special steels

Chemical Composition

Standard	Grade	C	Si	Mn	P	S	Cr
EN10083	30CrNiMo8/1.6580	0.26-0.34	≤0.4	0.5-0.8	≤0.025	≤0.035	1.8-2.2
EN10250		0.26-0.34	≤0.4	0.3-0.6	≤0.035	≤0.035	1.8-2.2

Equivalent Grades of Steel 30CrNiMo8(1.6580)

EU	Germany	Japan	France	England	China	Russia	Inter
EN	DIN,WNr	JIS	AFNOR	BS	GB	GOST	ISO
30CrNiMo8	30CrNiMo8	SNCM431	30CND8	823M30	30Cr2Ni2Mo	3KH3M3F	31CrNiMo8

Description of Steel 30CrNiMo8(1.6580)

30CrNiMo8 is a heat treatable steel and usually supplied with quenched and tempered condition or Q & T condition and with a tensile strength of 1100 -1300 N/mm². 30CrNiMo8 steel is used for automotive and general components which requires high demands on strength and toughness and good hardenability.It is especially suitable for heavy duty parts in the aviation, automotive and military industries.

Size Tolerance

Surface Finish	Size Tolerance	Length
Black For Forged condition	(0，+5 ~ +8mm)	Multiple Length/Fixed Length
Black For Rolled condition	(0，+1mm)
Rough Turned	(0，+3mm)

Mechanical properties of Steel 30CrNiMo8(1.6580)

Property	160mm < tR ≤ 330mm	330mm < tR ≤ 660mm
Tensile Strength	min. 850 N/mm²	min. 800 N/mm²
Yield Strength	min. 630 N/mm²	min. 590 N/mm²
Elongation	min. 12% (l)	min. 12% (l)
Kv-Impact value	min. 45J (l)	min. 40J (l)

Note: tR refers to the thickness range.

Heat Treatment Conditions

+A Soft annealed/Soft annealing
+N Normalized/Normalizing
+QT Quenched and Tempered
+U Untreated
+SR Stress Relieved

Normalizing:870℃-880℃,Cool in air
Soft Annealing:650℃-700℃,Cooling 10℃ per hour  in furnace,max. 248 HB
Stress Relieving:50°C under the temperature of tempering
Hardening:830 – 860°C,oil or polymer,840-850°C,water
Tempering:540°C – 660°C, cool in still air

Drawn and hot-rolled bars, flat bars 30CrNiMo8, 1.6580
Forgings and forged bars in grade 30CrNiMo8, 1.6580