This is an introduction to the viscosity of molten metal, including the dynamic viscosity of various liquids.
Casting involves pouring liquid metal into a mold, and if the viscosity resistance increases, it will take longer to fill the mold, with the possibility of solidifying along the way. The viscosity of a liquid is represented by a numerical value known as the viscosity coefficient (symbol η) in physics. In the case of liquid flow, the viscosity resistance is influenced not only by the viscosity coefficient but also by the density (symbol ρ). The value obtained by dividing η by ρ (known as kinematic viscosity or kinematic coefficient, symbol ν) is given by ν = η / ρ, and it is a key factor governing viscosity resistance. Since the value of η for molten metal is originally small and combined with a high ρ, the value of ν becomes extremely small. [Kinematic Viscosity ν (10^-2 × cm²/s)] ■ Water: 1 ■ Ethyl Alcohol: 1.5 ■ Steel: 0.5 ■ Cast Iron: 0.7 ■ Copper: 0.4 *For more details, please refer to the PDF document or feel free to contact us.
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【Other dynamic viscosities ν (10-2 × cm2/s)】 ■Aluminum: 0.2 ■Tin: 0.13 ■Zinc: 0.17 ■Lead: 0.13 ■Mercury: 0.11 *For more details, please refer to the PDF document or feel free to contact us.
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Since our establishment in 1973, we have been engaged in the manufacturing of bronze alloy sand castings, primarily focusing on various types of valves for over 50 years. In 2004, we established a subsidiary, Daimaru Industry, in Dalian, China, and have developed a consistent production and mass production system centered on water faucet hardware and general valves, selling both domestically and internationally. We respond to a variety of customer needs, from large to small items, as well as small lot products and items made from different materials. Please feel free to contact us with your requests.