W.-Nr. 1.2842 ( DIN 90MnCrV8 ) - ASTM O2 high carbon alloy cold work tool steel plates

Designations

Chemical composition ( in weight % )

Description

Oil hardenable medium alloyed cold work tool steel, highest dimensional stability during heat treatment,

shallow dept of hardening, good wear resistance and toughness, easy to machine and simple heat treatment,

good cutting ability and edge holding properties, low distortion, low polishability.

Applications

Tool steel for universal use, highly stressed plastic moulds, mould inserts for high hardeness and abrasive stress,

blanking and stamping tools for all types cutting sheet metals up to 6 mm thickness, cold forming dies, cutting and

punching tools of all types, shear blades for paper, plastic and metalworking industries, reamers, thread chasers and

cutting tools, pressure pads, guide pins, taps, measuring tools, precision calipers and plug gauges, woodworking tools,

plastic and rubber compression moulds, deep drawing tools, clipping beds and punches, industrial knives, ejector pins,

drills, guide strips, broaches, box grooves, clamping plates.

Physical properities

Thermal conductivity W/(m.K)  20°c / 30

Density g/cm 20°c / 7.85

Coefficient of linear thermal expansion

Heat Treatment 

Annealing :  680 - 720 °C

Hardness after annealing :  Max. 220 HB

Stress relieving :  Approx. 650°c

Hot forming :  1050 - 850°c

Hardening :  790 - 820°c

Quenching media :  Oil, Salt bath ( 220 - 250°c ) up to 20 mm thickness

Hardness after quenching :  HRC 63 - 65

Hardness after tempering :

We are looking forward to your enquiries.

Contact:LIU

Email: sales@ahoneststeel.com

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