30CrNi3MoV 675 - GJB 31A-2000

Grade	30CrNi3MoV
	675
Corresponding Standard	GJB 31A-2000 Specification for 30CrMnMoRE, 30CrNi2MnMoRE and 30CrNi3MoV steel plates for armour use
Classification	Alloy Steel

30CrNi3MoV Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	V
Minimum Value	0.26	0.15	0.3	-	-	0.6	2.8	0.4	0.06
Maximum Value	0.32	0.35	0.5	0.015	0.01	1	3.2	0.5	0.013

30CrNi3MoV Mechanical Properties

thickness t mm	Hardness HBW
45~60	high tempering HBS10/300:≤269 indentation diameter≥3.7mm tempered fracture sample HBS10/300: 401~352 indentation diameter3.05~3.25mm
80	high tempering HBS10/300:≤269 indentation diameter≥3.7mm tempered fracture sample HBS10/300: 415~363 indentation diameter3~3.2mm

• Impact Absorption Energy:
The steel plate should be tested for Charpy V-notch impact energy at -40°C in the tempered condition. The impact absorption energy Akv (the average of two transverse specimens) should not be less than 30 J. The impact absorption energy results for 603 steel plates are not used as a basis for delivery.

• Heat treatment: Quenching temperature 870~910°C, holding time 2~3min/mm, water cooling; Tempering temperature 580~620°C, holding time 3~5min/mm, water cooling

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