TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 75 - Descriptions and data in the file are typical cases. We will not make guarantee for them. Besides, we reserve the final right to interpret improvement in materials, quality and/or performance. Steel grade (TGE23) Smelting method: EAF+LF+VD+ESR Main characteristics: High ductility, high thermal fatigue resistance, high thermal erosion resistance, high isotropic property, high purity and small heat treatment distortion. Major applications:  Mainly used for processing of light alloy – metal pipes, rods, extruded carrier rods, molds, and extruded molds, etc.  Pressure casting equipment, molded trimming die, compression moulding inserts, etc.  Hot shearing blades, plastic molds, etc. Chemical constituent %: C Si Mn Cr Mo V P S 0.37 0.3 0.4 5.0 2.2 0.45 ≤0.015 ≤ .001 Physical property: Room temperature density (Kg/m 3 ) Specific heat of room temperature (J/Kg·K) 200ºC thermal conductivity (W/m•K) Elastic modulus (N/mm 2 ) Linear expansivity (×10 -6 K) 20~200ºC 20~400ºC 7.85 460 29.7 215,000 12 12.5 Ultrasonic flaw detection: As per GB/T4162 Class AA flaw detection, i.e., flat bottom hole ≤Φ 1mm, no flaw detection noise wave shall appear or please comply with customer regulations. Purity: Class A Class B Class C Class D Fine Coarse Fine Coarse Fine Coarse Fine Coarse 1.0 0.5 1.5 1.0 1.0 1.0 1.5 1.0 Delivery state: (1) Delivery hardness: delivery under annealing state, delivery hardness ≤229HB; (2) Organization state and impact power requirement: the organization and segregation shall comply with North American Die Casting Association No. 207 criterion; (3) Impact power sample: please sample according to the central part of steel. The samples shall be treated according to criterions in North American Die Casting Association, making sure that hardness of samples at 45±2HRC. Dimension of samples: 7*10*55. Gapless. Specification (diameter, thickness mm) Average impact power at the center part not less than (J) Minimum impact power per sample not less than (J) ≥60 ～ 200 380 350 ≥201-300 350 300 ≥ 01 300 250 Supply specification: Product name Specification/mm Material Forged round bar Ф70 ～ 450 TGE23 Forged module (120 ～ 400)× (300 ～ 800) TGE23 Rolled round bar Ф16 -70 TGE23 Rolled flat bar (12 ～ 120)× (200~810) TGE23 HOT WORK STEEL