Hot Die Steel H 11, For Construction, For Pharmaceutical / Chemical Industry

Chemical Composition: ElementMinMaxCarbon, C0.320.42Manganese, Mn00.50Silicon, Si0.801.20Molybdenum, Mo11.50Chromium,Cr4.505.50V0.300.50C00Physical Properties: APropertiesMetricImperialDensity7.81 g/cm 30.282 lb/in 3Melting point1427°C2600°FThermal Properties: PropertiesMetricImperialThermal expansion (@20-100ºC/68-212ºF)11.9 x 10 -6 /ºC6.63 µin/in°FThermal conductivity (@100ºC/212ºF)42.2 W/mK292.9 in/hr.ft².°FOther Designations: AFNOR Z 38 CDV 5AMS 6485SAE J438DIN 1.2343AMS 6487SAE J467UNI KUAMS 6488UNS T20811JIS SKD6ASTM A681AISI 610B.S. BH 11FED QQ-T-570ASTM A579AMS 6437SAE J437MIL S-47262Heat Treatment: H11 tool steels are preheated to 816°C (1500°F). Then the steels are directly heated by increasing the temperature to 1010°C (1850°F) followed by holding for 15 to 40 mins. The steels are then air-quenched.Forging: H11 tool steels are forged at 1121°C (2050°F). For this type of steels, forging below 899°C (1650°F) is not preferable.Annealing: H11 tool steels are annealed at 871°C (1600°F) and slowly cooled at 4°C (40°F) in the furnace.Tempering: Tempering is carried out on H11 tool steels at temperature ranging from 538 to 649°C (1000 to 1200°F) to obtain Rockwell C hardness of 54 to 38. Double tempering can also be performed in these steels every one hour at the preferred tempering temperature. Application:H11 tool steels are suitable for designing highly stressed structural parts such as aircraft landing gear.