JIS G4106 SMn420 steel

JIS G4106 SMn420 is a high manganese carbon steel. It has medium strength, the properties of small size is similar to JIS G4106 SCr420. But tenacity at low temperature impacting and welding properties are better than JIS G4106 SCr420. Besides, it also has good ductility when deforms, excellent machine work,high hardenability and so on.

http://www.bsteelplate.com/Alloy-structural-steels/JIS-G4106/JIS-G4106-SMn420-steel.html?li

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