1.2738 Plastic Mould Steel Plate

1.2738 Plastic Mould Steel Steel-making Condition: EF, EF/EAF+LF+VD, EF/EAF+ESR Delivery Condition: Annealed , Quenched + Tempered Surface Condition:  Black, Grinded, Peeled, Rough turned, Polished Features: 1.Competitive price 2.Immediate delivery 3.Premium quality 4.Reliable service 5.MOQ: 1 Ton Heat Treatment: Annealing: Annealing temperature: 710 ~ 740 °C, holding time is decided by the thickness of the DIN 1.2738 die steel, one hour per 25mm. Colding in furnace after thermal insulation. Destressing: Heating temperature: 600 °C (annealed condition), 550 °C (quenching and tempering state), holding time is decided by the thickness of the 1.2738 steel, one hour per 50mm. Colding in furnace after thermal insulation. Quenching and tempering: Preheating temperature 500 ~ 600 °C, quenching temperature 840 ~ 880 °C, holding 30min (the mold have to quenching in the protective gas to prevent oxidation and decarbonization). Oil cooling, cooling to 50 ~ 70 °C,immediately tempered. Tempering holding time is decided by the thickness of the 1.2738 steel mould, one hour per 25mm, at least 2h. Tempering temperature: 180 °C / 200 °C / 300 °C / 400 °C / 500 °C / 600 °C, the hardness: 52HRC / 51HRC / 48 HRC / 46HRC / 42HRC / 34HRC. Applications: Large plastic moulds with deep engravings and intensive impacts on the core. 1.2738 Pre hardened Plastic Mold Steel is the logical development of 1.2311, a pre-hardened plastic mould steel for use in large moulds, which also have to display high core strength. The additional nickel content of 1 % increases through hardening. 1.2738 is a micro-alloyed, vacuum-degassed steel with the following excellent features: good machinability, outstanding polishability, good texturing properties. Introduction: 1.2738 Pre-hardened Plastic Mould Steel, hardness in as-delivered condition 280 to 325 HB. Good machinability, suitable for texturing, improved through hardening in comparison to 1.2311, good polishability. We are the leading manufacture and supplier of mould steel in China, we can provide the below: 1. High Quality 2. Various Type and Specification 3. Competitive Price 4. Perfect Service 5. On Time Delivery                                             Equivalent grades GB DIN AISI JIS ASSAB 3Cr2NiMnMo 1.2738 P20+Ni NALSS 718 Chemical  Composition China grades Foreign C Si Mn Cr P≤ S≤ Mo Ni -- 1.2738 0.35-0.45 0.20-0.40 1.30-1.60 1.80-2.10 0.035 0.035 0.15-0.25 0.90-1.20 3Cr2NiMo P20+Ni 0.32-0.40 0.20-0.40 1.00-1.50 1.40-2.00 0.030 0.030 0.30-0.55 0.80-1.20 3Cr2NiMnMo 718 0.32-0.40 0.20-0.40 1.10-1.50 1.70-2.00 0.030 0.030 0.30-0.55 0.80-1.20 Available size Round Bar Diameter Length 20-400mm 2000-6000mm Flat Bar Thickness Width 20-800mm 1500-mm Heat Treatment Quenching Tempering Heating Temperature Cooling Hardness Heating Temperature Cooling Hardness 840-870 Oil or Air ≥50 550-640 Air 28-36