3Cr2MnNiMo
3Cr2MnNiMo is widely used in international plastic mold steel, its good mechanical properties, high hardenability, can make a large section of the steel after quenching and tempering treatment in a more uniform hardness distribution, have a good polishing performance and finish. With the steel mold, generally before the quenching, the hardness is HRC28 ~ 35 (ie pre-hardened), then processed into the mold can be used directly, it will ensure the use of large or extra large mold performance, but also to avoid the heat caused by mold the deformation. The steel suitable for manufacturing large, large plastic molds, precision plastic mold, can also be used to produce low melting point alloy (such as tin, zinc, aluminum) with the casting mold.
Factory state: After hardening and tempering to hardness DELIVEREDCONDITION290330HB
Steel properties: (1) This has been heat-treated steel, even hardness through the stable (HB290-330) never made mold deformation.
(2) In addition to smaller fancy, the more black surface oxidation has been excluded, so the high material utilization, and reduce processing costs.
(3) by ultrasound examination, uniform hardness and metallurgical structure, and easy to reach a mirror finish.
(4) The method can be flame hardened in the air, so that part of the vulnerable areas to 50-55HRC and hard about 5mm depth.
(5) due to the low sulfur content, is more suited for EDM.
3Cr2MnNiMo chemical composition:
Carbon (C) 0.33 ~ 0.37, manganese (Mn) 0.80 ~ 1.10, Nickel (Ni) 0.40 ~ 0.50, silicon (Si) 0.15 ~ 0.35, molybdenum (Mo) 0.40 ~ 0.50, chromium (Cr) 1.65 ~ 1.75
Factory state: After hardening and tempering to hardness DELIVEREDCONDITION290330HB
Steel properties: (1) This has been heat-treated steel, even hardness through the stable (HB290-330) never made mold deformation.
(2) In addition to smaller fancy, the more black surface oxidation has been excluded, so the high material utilization, and reduce processing costs.
(3) by ultrasound examination, uniform hardness and metallurgical structure, and easy to reach a mirror finish.
(4) The method can be flame hardened in the air, so that part of the vulnerable areas to 50-55HRC and hard about 5mm depth.
(5) due to the low sulfur content, is more suited for EDM.
3Cr2MnNiMo chemical composition:
Carbon (C) 0.33 ~ 0.37, manganese (Mn) 0.80 ~ 1.10, Nickel (Ni) 0.40 ~ 0.50, silicon (Si) 0.15 ~ 0.35, molybdenum (Mo) 0.40 ~ 0.50, chromium (Cr) 1.65 ~ 1.75
