Yong Wei steel mold (Dongguan) Co., SK4 rod, SK4 provided by Yong Wei steel mold (Dongguan) Limited. We are a steel mold, Dongguan City, An Yongwei shop (www.dgyongwei.com) located at: Dongguan specializes in: Die steel demand growth DC53, SKD11.SUS440C, SUS420 abrasives is much higher than metal bonded abrasives demand for products, including bonded abrasives, coated abrasives and abrasive and polishing powder, silicon carbide, etc. Currently, non-metal bonded abrasives demand growth in demand is much higher than the amount of metal bonded abrasives products, including bonded abrasives, coated abrasives and abrasive and polishing powder and so on. By 2013, this gap is expected to continue to widen SK4 wholesalers, non-metal bonded abrasives production and sales will be fully over metal bonded abrasives. In recent years, due to the diamond wire and silicon carbide blade material in the production of high-tech field of monocrystalline silicon, polycrystalline silicon and other irreplaceable SK4 rod, abrasive and polishing powder will usher in a new peak demand. Hardness is the main technical indicators mold steel, mold under high stress constant desire to maintain its shape and size, must have a sufficiently high hardness. Cold work die steel hardness at room temperature is generally maintained at about HRC60, hot die steel in accordance with their working conditions, the general requirements to keep in HRC40 ~ 55 range. For the same kinds of steel, the hardness value within a certain range, the hardness and deformation resistance is proportional; but rather between the composition and organization of different kinds of steel, the plastic deformation resistance may have significant differences with the same hardness value. Hot die due to the temperature conditions at work, require materials with heat resistance and thermal wear, life of the mold to cool SK4 mold material, mold will appear alternately hot and cold cracking, namely thermal fatigue crack, so the material also requires the ability of anti-cracking and thermal fatigue resistance.