42CrMo4/1.7225/4140/SCM440/EN19

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

EN 10132-3: 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Steels for quenching and tempering

EN 10305-1: 2010 Steel tubes for precision applications. Seamless cold drawn tubes. Technical delivery conditions

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

EN 10263-4: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering

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

EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions

Chemical composition

Standard	Grade	C	Si	Mn	P	S	Cr
ASTM A29	4140	0.38-0.43	0.15-0.35	0.75-1.00	≤ 0.035	≤ 0.04	0.8-1.1
EN10083	42CrMo4	0.38-0.45	≤ 0.4	0.6-0.90	≤ 0.025	≤ 0.035	0.9-1.2
	1.7225
JIS G4105	SCM440	0.38-0.43	0.15-0.35	0.6-0.85	≤ 0.035	≤ 0.04
GB 3077	42CrMo	0.38-0.45	0.17-0.37	0.5-0.80	≤ 0.035	≤ 0.035
BS 970	EN19	0.35-0.45	0.15-0.35	0.5-0.80	≤ 0.035	≤ 0.035

Equivalent Grades of Steel 30CrNiMo8(1.6580)

EU	Germany	Japan	France	England	China	Russia	Inter
EN	DIN,WNr	JIS	AFNOR	BS	GB	GOST	ISO
42CrMo4	42CrMo4	SCM440H	42CD4	708M40 CFS11	42CrMo	42HM	42CrMo4

Description of Steel 42CrMo4(1.7225)

42CrMo4 material (1.7225 steel) is an European standard alloy steel, the delivery condition of this steel is mostly tempered and quenched, it has high strength, high toughness, good hardenability, temper brittleness, high fatigue limit, good impact resistance after quenching and tempering, and good low temperature impact toughness. This steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain degree of strength and toughness, transmission gears, rear axles, load-carrying connecting rods, spring clips and oil deep well drill pipe joints.

Size Tolerance

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

Mechanical properties of Steel 42CrMo4(1.7225)

Property	Specification
Yield Strength	Re > 500 MPa
Tensile Strength	Rm: 750-900 MPa
Elongation	A > 14%
Percent Reduction of Area	Z > 550%
Impact Energy	KV > 35 J

 

Heat Treatment Process	Temperature Range	Cooling Method
Normalizing	850-880°C	Cooling in air
Soft Annealing	680-720°C	Cooling in furnace
Stress Relieving	450-650°C	Cooling in air
Hardening	820-880°C	Oil or water quench
Tempering	540-680°C	Cooling in air