Description
H11 is one of the Hot Work, Chromium type tool steels. It is relatively low in carbon content and has good toughness and deep hardens by air quench from heat treatment. Good combination of toughness, hardness and wear resistance in hot. Resistance to softening and to cracking.
Applications
H11 is often used for highly stressed structural parts such as aircraft landing gear. It resists softening at temperatures up to 537oC while retaining good ductility and toughness even at strength levels on the order of 275 ksi. Tools for hot forging of light metal. Pressure die casting tools. Dies, mandrels, punchers, knives, moulds. This grade can be water cooled. For most highest requirements we recommended UTOPMO1 EFS.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 215, 176 (at 500oC), 165 (at 600oC)
Density [g/cm3]: 7.80, 7.64 (at 500oC), 7.60 (at 600oC)
Thermal conductivity [W/m.K]: 25, 28.5 (at 500oC), 29.3 (at 600oC)
Electric resistivity [Ohm mm2/m]: 0.52, 0.86 (at 500oC), 0.96 (at 600oC)
Specific heat capacity[J/g.K]: 0.46, 0.55 (at 500oC), 0.59 (at 600oC)
Soft Annealing
Heat to 800-840oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 650oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1000-1040oC followed by air, oil quenching or warm bath quenching 500-550oC. Hardness after quenching is 50-56 HRC.
Company information
Bozhong Group Mainly supply in forms of coil, sheet, plate, rod, bar, tube, pipe, beam, angle, flange, wire, strip, channel, etc., with various varieties, wide range of dimensions, high purity, stable chemical composition, high dimensional accuracy and excellent surface quality. The products are mainly used in the fields of industries such as automobile engineering, railway transportation, aviation, aerospace, machinery, petrochemical, energy, environmental protection, offshore, chemical, oil & gas, ilitary, power plant, nuclear power, pressure vessel, boiler equipment, mold manufacture, etc.
Bozhong Group can supply a variety of structural steel, high-strength steel, wear-resistant steel plate, boiler and pressure vessel steel, marine engineering and stainless steel plate in the thick steel and various European standard bars and pipes and profiles.Our global sales and service network throughout all around the world to ensure that the goods reach the customer in the shortest time.
We can follow your drawings and requirements, to provide you with oxygen cutting, plasma cutting and laser cutting and other processing services. You can also perform ultrasonic testing in accordance with EN10160 standard, EN10164 standard test Z15, Z25, Z35, weld bending detection, PWHT detection,etc.
We have ISO9001: 2000 quality management system certification, and obtain the quality certification from all the well-known certification company, including TuV / LRS / GL / CE and so on.
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