42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel

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42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel

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

ASTM A2941400.38-0.430.15-0.350.75-1.00≤ 0.035≤ 0.040.8-1.1
EN1008342CrMo40.38-0.45≤ 0.40.6-0.90≤ 0.025≤ 0.0350.9-1.2
JIS G4105SCM4400.38-0.430.15-0.350.6-0.85≤ 0.035≤ 0.04
GB 307742CrMo0.38-0.450.17-0.370.5-0.80≤ 0.035≤ 0.035
BS 970EN190.35-0.450.15-0.350.5-0.80≤ 0.035≤ 0.035

Equivalent Grades of Steel 30CrNiMo8(1.6580)




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 FinishSize ToleranceLength
Black For Forged condition(0,+5mm)Multiple Length/Fixed Length
Black For Rolled condition(0,+1mm)

Mechanical properties of Steel 42CrMo4(1.7225)

Yield StrengthRe > 500 MPa
Tensile StrengthRm: 750-900 MPa
ElongationA > 14%
Percent Reduction of AreaZ > 550%
Impact EnergyKV > 35 J


Heat Treatment ProcessTemperature RangeCooling Method
Normalização850-880°CCooling in air
Soft Annealing680-720°CCooling in furnace
Stress Relieving450-650°CCooling in air
Hardening820-880°COil or water quench
Têmpera540-680°CCooling in air


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