TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 55 - 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 (A8M) Smelting method: (1) EAF+LF+VD; (2) EAF+LF+VD+ESR Main characteristics: Extremely high quenching, strong hardening, high abrasion performance and extremely high compression strength. Major applications:  Bearing small impact load during manufacturing, highly resistant cold punching, cold shearing cutting, drill sleeves, gages, wire drawing dies, screw plates, drawing dies, screw thread rolling dies, and other dies. Chemical constituent %: C Si Mn Cr Mo W V P S 2.05 0.25 0.3 11.5 - - - ≤0.030 ≤0.010 Physical property: Room temperature density (Kg/m 3 ) Specific heat of room temperature (J/Kg·K) Room temperature thermal conductivity (W/m•K) Elastic modulus (N/mm 2 ) Linear expansivity (×10 -6 K) 20~200ºC 20~400ºC 7.67 460 20 210,000 12.0 12.9 Ultrasonic flaw detection: Electric furnace steel: flaw detection standard: as per SEP1921- D/d flaw detection or GB/T6402-2008 Class 3, or as per customer requirements. Electroslag steel: flaw detection standard: as per SEP1921- E/e flaw detection or GB/T6402-2008 Class 4, or as per customer requirements.Purity: Electric furnace steel: Class A Class B Class C Class D Fine Coarse Fine Coarse Fine Coarse Fine Coarse 1.5 1.0 2.0 1.5 1.5 1.0 1.5 1.5 Electroslag steel: 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, ≤255HB; (2) Unevenness of eutectic carbide shall comply with BÖHLER standard. Supply specification: Product name Supply specification of electric furnace steel/mm Supply specification of electroslag steel/mm Forged round bar Ф70~5 00 Ф70~5 50 Forged module (120~200)* (300~620) (120~350)* (300~810) Rolled round bar Ф16~7 0 Ф16~7 0 Rolled flat bar (12~120)* (200~630) (12~120)* (200~810) Small flat steel Small flat steel of various specifications with thickness under 30mm and width of 150mm Sheet metal Sheet metal with thickness under 10mm COLD WORK STEEL