High Carbon Silicon 6818 Grade

High Carbon Silicon 6818 Grade is a highly efficient composite deoxidizer, carbon enhancer, and alloying additive widely employed throughout the metallurgical industry. Produced through the high-temperature smelting and refining of high-purity quartz sand and premium carbonaceous materials, it features a precise ratio of silicon and carbon elements, exceptionally low impurity levels, and stable physicochemical properties. Specifically engineered for modern steelmaking and casting processes, it serves as a perfect substitute for costly traditional materials-such as ferrosilicon, calcium carbide, and standard carbon enhancers-delivering simultaneous deoxidation, carbon enhancement, and desulfurization benefits while significantly reducing production costs and enhancing both molten steel quality and smelting efficiency.

Iron and Steel Metallurgy: Suitable for the smelting of ordinary carbon steel, high-quality carbon steel, alloy steel, tool steel, and stainless steel. It facilitates comprehensive deoxidation, carbon enhancement, and desulfurization throughout the process, optimizing molten steel composition and improving the plasticity, toughness, and weldability of the finished steel products. It is compatible with various steelmaking processes, including both long-process and short-process methods.
Precision Casting: Used in the production of ductile iron, gray iron, and alloy cast iron. It performs deoxidation and degassing functions while refining grain structure, thereby enhancing the strength, wear resistance, and corrosion resistance of castings. It helps minimize defects such as porosity and cracks, making it ideal for the production of precision castings such as automotive components and mechanical parts.
Non-ferrous Metal Processing: Serves as a deoxidizer during the smelting of non-ferrous metals, such as aluminum and copper alloys. It effectively removes oxygen and impurities from the alloy melt, thereby improving the purity and mechanical properties of the non-ferrous metals. It is well-suited for the production of high-end non-ferrous metal products.

Q1: What distinguishes High Carbon Silicon 6818 Grade from other grades of high carbon silicon (such as 6515)?

A1: The core difference lies in the silicon and carbon content: Grade 6818 features Si ≥ 68% and C ≥ 18%, offering superior deoxidizing and carbon-increasing capabilities, making it ideal for the production of high-quality steel and precision castings; Grade 6515 features Si ≥ 65% and C ≥ 15%, offering a cost-effective solution that prioritizes cost control. You may select the appropriate grade based on your specific product specifications and budget.
Q2: How does one substitute traditional ferrosilicon when using this product? What is the recommended addition rate?
A2: We recommend substituting 75-grade ferrosilicon at a ratio of 1:1.2, while simultaneously reducing the amount of standalone carbon additives used. For first-time users, we suggest requesting a free sample to conduct small-batch trials; we will provide technical guidance to help you optimize your addition strategy.
Q3: What is the Minimum Order Quantity (MOQ)?
A3: The Minimum Order Quantity is 5 tons.

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