About 618 plastic mold steel Assab quality pre-hardened plastic mold steel work, ASSAB618 steel vacuum degassing system for refining steel, high purity, ultrasonic testing, uniform hardness and metallurgical structure, easy to polish the chemical composition C.: 0.37 Si: 0.30 Mn: 1.4 Mo: 0.20 Cr: 2.0 Ni:. 1.00 Purpose of the requirements for the mirror-polished plastic mold, plastic injection mold ordinary plastic injection molding of thermoplastic physical properties of temperature 20 ℃ 200 ℃ 400 ℃ 500 ℃ mold Steel density kg / m7810776077157700 thermal expansion coefficient 1 / ℃ --12.2 * 1014.4 * 1014.0 * 10 thermal conductivity W / m ℃ 37.938.035.933.9 elasticity N / mm208000201000186000172000 corresponding specific heat J / kg ℃ 465 ------ reference China GB standard steel grades 3Cr2Mo; German DIN standard material steel 1.2311; Buderus standard steel 2738; Sweden Assab ASSAB standard steel 618; American AISI / SAE standard steel P20; Russia ISO ISO standard steel 35CrMo2. About 618 die steel steel material prices, chemical composition and heat treatment process, the spot wholesale prices of various 618 Forged round, plate, small rod specification information, 618 die steel prices