TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 101 - 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 (TGP80) Smelting method: EAF+LF+VD+ESR Main characteristics: High mirroring performance, even hardness, excellent discharging processing performance and texture processing performance. Molds can be used upon processing and no heat treatment is required. Major applications:  Mirror plastic molds: Transparent plastic molds: optical instrument parts, compact disks, medical devices, etc.  Molds underlining discharging processing surface quality. Chemical constituent %: C Si Mn Cu Mo Ni Al P S 0.15 ≤0.45 1.55 1.0 0.35 3.1 0.95 ≤0.025 ≤0.003 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 7.8 460 22 218,000 12.3 13.2 Ultrasonic flaw detection: Flaw detection standard: as per GB/T 6402-2008 Class 4 flaw detection standard or as per customer requirements. Purity: Class A (sulfide) Class B (aluminate) Class C (Silicate) Class D (oxide) Fine Coarse Fine Coarse Fine Coarse Fine Coarse 0.5 0.5 1.0 1.0 1.0 1.0 1.5 1.0 Delivery state: (1) delivery under pre-hardening state, delivery hardness 38~42HRC. Supply specification: Flat steel Module 16~120mm×200~810mm 120~400mm×300~800mm PLASTIC MOULDS