40cr steel technology and specifications

40Cr steelmechanical steel manufacturing one of themost widely used. After quenching with good mechanical properties,good low temperature impact toughness and low notch sensitivity.Good hardenability of steel, water-quenching hardenability to Ф28 ~60mm, when oil quenching hardenability to Ф15 ~ 40mm. This steel isquenched things, except for cyanide and high frequency quenching.Cutting preferably, when the hardness of HB174 ~ 229, the relativemachinability of 60%. The steel is suitable for production ofmedium-sized plastic molds.

China Executive Standard: GB/T3077-1999
American Executive Standard: ASTM A29/A29M-04
Japanese Executive Standard: JIS G4053-2003
German implementation of the standards: EN 10083/1-1991
UK implementation of the standards: EN 10083/1-1991
French Executive Standard: EN 10083/1-1991
Russian Executive Standard: TOCT 4543-71
Performed by Chinese standards (GB/T3077-1999)

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