Overview
WF357 is a premium lubricant additive formulated for extreme pressure (EP) applications in industrial and automotive systems. Developed to reduce friction and prevent metal-to-metal contact in heavily loaded components, it is a critical ingredient in specialized gear oils and hydraulic fluids. Unlike conventional additives, WF357 combines sulfur-phosphorus compounds with advanced anti-wear agents, offering superior performance in high-temperature environments. Its formulation is tailored for compatibility with mineral and synthetic base oils.
Physical and Chemical Properties
WF357 exhibits a high viscosity index, maintaining optimal lubrication across a wide temperature range (-20°C to 150°C). Its sulfurized components form protective tribofilms on metal surfaces, while phosphorus enhances load-bearing capacity. The additive demonstrates excellent oxidative stability, with a flash point exceeding 200°C. Laboratory tests show a 40-60% reduction in wear scar diameter compared to standard EP additives under ASTM D4172 conditions. Its kinematic viscosity typically ranges between 100-150 cSt at 40°C.
Main Applications
Primary use cases include heavy-duty gearboxes in mining equipment, wind turbine transmissions, and construction machinery differentials. It is particularly effective in hypoid gear applications where sliding motion creates extreme pressure conditions. In metalworking, WF357 serves as a key component in cutting and forming fluids, reducing tool wear by up to 30%. The automotive sector utilizes it in limited-slip differential additives and high-performance transmission fluids, especially for vehicles operating in mountainous terrains or towing heavy loads.
Safety and Storage
While WF357 is not classified as acutely toxic, prolonged skin exposure may cause dermatitis. Facilities should maintain SDS documentation and provide nitrile gloves and safety goggles for handlers. Storage requires corrosion-resistant containers (preferably HDPE or stainless steel) with nitrogen blanketing recommended for bulk storage. Shelf life is 24 months when stored properly. Incompatible with strong oxidizers and alkaline materials – separate storage is mandatory for these substances.
B2B Procurement Guide
Industrial buyers should specify the required treat rate (typically 1.5-3% by weight) and request certified analysis reports for each batch. Key parameters to verify include active sulfur content (8-12%), phosphorus content (2-4%), and copper strip corrosion rating (1A max). For large-volume procurement (10+ metric tons), negotiate based on annual usage commitments. Container sizes range from 180kg drums to 1,000kg IBCs. Leading manufacturers offer technical support for formulation optimization and performance testing services.
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