GS2711 conventional abrasive steel smelting (Conventional melting, EF + LF + VD) Key Features oil quenching and gas quenching plastic mold steel, with Good Good Good through hardening properties of heat resistance and toughness, adapt with the use of cold-work tool suitable for surface treatment (such as chrome) good polishing performance main purpose casting molds, support tools, mold Large mold need high hardness chemical composition% C Si Mn PS Cr Mo Ni V 0.50-0.60 0.15-0.35 0.50-0.80 ≤0.025 ≤0.025 0.60- 0.80 0.25-0.35 1.50-1.80 0.07-0.12 physical properties of a thermal expansion coefficient 20-100 ℃ Celsius [10 -6 m / (m × K)] 20-200 ℃ Celsius [10 -6 m / (m × K)] 20- 300 ℃ Celsius [10 -6 m / (m × K)] 20-400 ℃ Celsius [10 -6 m / (m × K)] 20-500 ℃ Celsius [10 -6 m / (m × K)] 11.8 12.7 13.4 14.0 14.3 Thermal conductivity 20 ℃ Celsius [W / (m × K)] 350 ℃ Celsius [W / (m × K)] 700 ℃ Celsius [W / (m × K)] 37.5 36.0 32.5 Factory state: quenching Pre-hardened to 310-345 (~ 32-36HRC) or 340-380 (~ 36-40HRC) using state 310-345 (~ 32-36HRC