1.2738

Material Code:

     DIN                    ASTM                JIS               GOST

   1.2738                   P20+Ni                -                  -

Properties:

Plastic mould steel with excellent polishability properties, good wear resistance, contains 1% Ni alloy in addition to 1.2311, because of the Ni addition there is no hardness decrease in the center of large sizes over 400mm thickness, easy hard chrome plating, photo etching and flame hardness.                   

Applications:

Plastic injects moulds with high mirror surface requirements, large injection and compression moulds for plastic processing over 400mm thickness such as bumpers, instrument panels, garbage containers, dashboards, waste bins, chairs, bottle crates, television cabinets etc., moulds carrier frames for the plastic moulds, components for general machinical engineering and tool manufacture, synthetic plastic moulding dies, pressure casting frames, hydro forming tools, structural components, shafts, blow moulds, extrusion dies for thermoplastic.                           

Physical Properties:

Density                   : at 20°C 7,85dm3              

100°C

200°C

300°C

400°C

500°C

12,8

13,0

13,8

14,0

14,2

Heat Treatment :

Annealing               : 710-730°C

Hardness after annealing   : Max. 240HB

Stress relleving           : Approx. 600°C

Hot forming             : 1050-850°C

Hardening               : 870-890°C

Quenching media         : Oil, Salt both ,Vacuum   

Hardness after quenching   : 50-54 HRC                          

Hardness after tempering   :

100°C

200°C

300°C

400°C

52HRC

51HRC

49HRC

46HRC