TGK SPECIAL STEEL PVT. LTD.

PLASTIC MOULD TGP 80 (Equivalent Grade of NAK80) 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. EAF + LF + VD + ESR SMELTING METHOD MAIN CHARACTERISTICS MAJOR APPLICATIONS O 20 ~ 400 C Room temperature 3 density (Kg/m ) 7.80 Specific heat of room temperature (J/Kg.K) O 200 C thermal l conductivity (W/mK) Elastic mouldus 2 (N/mm ) -6 Linear expansivity (x10 K) 460 22 218,000 12.3 13.2 O 20 ~ 200 C PHYSICAL PROPERTY  Mirror plastic molds: Transparent plastic molds: optical instrument parts, compact disks, medical devices, etc.  Molds underlining discharging processing surface quality. DELIVERY STATE: Delivery under pre-hardening state, deliver hardness 38-42 HRC. SUPPLY SPECIFICATION FLAT STEEL MODULE 16 - 120mm x 200 - 810mm 120 - 400mm x 300 - 800mm PURITY Coarse 1.0 Class A 0.5 0.5 Class B Class C Class D Fine Coarse Fine Coarse Fine Coarse Fine 1.0 1.0 1.0 1.0 1.5 CHEMICAL COMPOSITION (%) C Mo Mn P Ni 0.15 Ai 0.95 S 3.1 0.35 0.025 Si Cr 1.0 0.003 0.45 1.55 ULTRASONIC FLAW DETECTION Flaw detection standard: as per GB/T 6402-2008 Class 4 flaw detection standard or as per customer requirements. Softening annealing Quenching Tempering O Heating to 760 C for heat insulation O O and cooling to 600 C at 40 C/h THERMAL TREATMENT Delivery under pre-hardening state, no heat treatment, O temperature of nitridation treatment 520 C Hardness (H ) B 44