718H die steel use
Large-scale long-life plastic injection molds, such as home appliances, computer casings and other molds; molds for plastic products with high surface finish; blow molds; due to their high hardness, they can be used for sliders in plastic molds; forming tools, compression-brake molds ( Bay plate machine model), (according to production needs, flame hardening or nitriding treatment can be applied); structural parts and shafts.
718H Die Steel Properties
Physical properties at room temperature and slightly higher temperature when hardened and tempered to 340HB hardness
Temperature 20 200 400
Density: 7.85g/cm3;
Coefficient of thermal expansion starting at 20°C 1/°C -- 12.7*10-6 13.6*10-6
Thermal conductivity W/m℃ 29.0 29.5 31.0
Elastic coefficient N/mm2 205,000 200,000 185,000
Specific heat J/kg℃ 460 -- --
Tensile strength of 718H:
Approximate value. The test piece is taken from round steel with a diameter of 25.4 mm. Hardness 340HB
Test temperature 20°C 200°C 400°C
Tensile strength Rm
N/mm2 1100 1045 870