Designed for hot steel casting molds 1.2344 1.2344 1.2344 ESR tool steel mold steel imports

1.2344 1.2344 tool steel for pressure hot work die steel. The steel after remelting, material uniformity, hardenability good, with excellent machinability and polishing properties, high toughness and plasticity, good high and low temperature and high temperature fatigue wear and heat resistance. 1. Overview of material uniformity, excellent machinability and polishing, 2. High toughness and high ductility, high wear resistance under high temperature 3., 4. Excellent overall hardening, 5. good high temperature strength and corrosion thermal fatigue resistance. 6. Very low heat distortion resistance, 7. Compared with the traditional steel has better isotropic, each direction has excellent toughness and ductility .1.2344 to withstand hot work die steel. The steel after remelting, material uniformity, hardenability good, with excellent machinability and polishing properties, high toughness and plasticity, good high and low temperature and high temperature fatigue wear and heat resistance. [1] 2 softening annealing heat treatment forged hardened and tempered 1050-850 ℃ 820-840 ℃ 1020-1050 ℃ 520-700 ℃ Purity: according to ASTM E45 method A, A sulfide ≤0.5, B oxide, C silicate salts and oxides each ≤1 D spherical or DIN 50602-K1≤10 or according to customer requirements. Steel Factory state: soft annealed, good microstructure, hardness up to 229HB or quenched and tempered to customer requirements. Isothermal annealing annealing temperature specification (850 ± 10) ° C, insulation 2h, with the furnace cooled to (720 ± 10) ℃, insulation 4h, furnace cooling to below 500 ° C, cooled baked, hardness ≤229HBW. Tempering tempering temperature specification (730 ± 10) ° C, insulation 2h, furnace cooling whole ≤500 ° C, cooled baked. Quenching, tempering standard quenching temperature 850 ~ 880 ℃, oil cooling, hardness 50 ~ 52HRC; tempering temperature 580 ~ 640 ° C, cooled baked, hardness 28 ~ 36HRC Pre-hardened specification heating temperature 860 ~ 900 ° C, oil cooling tempering temperature 570 ~ 70O ° C, air-cooled, tempering hardness 28 ~ 35HRC. [2] 3 Physical Properties 1) Density: 7.31g / cm. 2) linear expansion coefficient: temperature 18 ~ 100 ℃ / 18 ~ 200 ° C / 18 ~ 300 ° C / 18 ~ 400 ° C / 18 ~ 500 ° C / 18 ~ 600 ℃ / 18 ~ 700 ℃, linear expansion coefficient 11.9 .. × 10K / 12.20 × 10K / 12 50 × 10K / 12 81 × 10K / 13.11 × 10K / 13.41 × 10K / 13.71 × 10K 3) elastic modulus: (20 ° C) 212000MPa, shear modulus (room temperature) To 825000MPa, Poisson's ratio 0.288 4) thermal conductivity: temperature 20 ℃ / 100 ℃ / 200 ° C / 300 ° C / 400 ° C, the thermal conductivity of 36.0 [W / (m · K)] /33.4[W/ (m · K)] / 31.4 [W / (m · K)] / 30.1 [W / (m · K)] / 29.3 [W / (m · K)] [3] 4 by state 30-56HRC. Delivery Status: Plastic Mold flat YB / T 094-1997 requirements: Flat width 170 ~ 410mm, thickness of 25 ~ 105mm. Available in 29. 5 ~ 35HRC hardness conditions. Pre-hardened state, hardness ≤28HRC; annealed hardness ≤22HRC [4] 5 chemical composition C Si Mn PS Cr MO V 0.38-0.42 0.8-1.2 0.30-0.50 ≤0.015 ≤0.002 4.80-5.50 1.2-1.5 0.90-1.10 6 Ultrasonic Inspection ASTM A388-FBH max.3mm (1 / 8inch) or SEP 1921-test group3-ciassE, e or according to customer requirements. 7 Main applications 1. casting mold (mold kernels, fasteners, the mold, nozzles, nitriding thimble) 2. extrusion die (die kernels, supports, choke block) 3. pressing mold, (aluminum, magnesium, copper alloy,) 4. member, such as cold cut, burrs, hot shear, wear parts, corresponding to Japanese grades 8 corresponding trademark: SKD61 corresponding U.S. grades: H13 corresponding English grades: BH13