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YFS screw mainly imports chromium-molybdenum alloy steel SCM435H from NIPPON STEEL and SUMTOMO METALS to ensure leading raw materials.
YFS screw invested heavily in purchasing a TXG surface blackening heat treatment furnace from TOYO-RO in Japan, which is fully computer-controlled to ensure the stability of heat treatment and consistency of screw surfaces.
YFS screw has a complete materials mechanical performance laboratory, which has been certified by CNLA and A2LA. They conduct random inspections and maintain records for each batch of screws produced to ensure quality stability and traceability.
The stability of the electroplated nickel layer in air is very high. Since metallic nickel has strong passivation ability, it can quickly form an extremely thin passivation film on the surface to resist corrosion from the atmosphere, alkali, and some acids.
The crystallization of electroplated nickel is extremely fine and has excellent polishing properties. The polished titanium plating can obtain a mirror-like luster, and at the same time, it can maintain its luster for a long time in the atmosphere.
12.9 grade screws are made of SCM435 alloy steel, with a minimum tensile strength of 1220Mpa and a hardness of 39-44HRC. They are widely used in industries such as textiles, hydraulics, injection molding, and machinery.
12.9 grade is a high-strength variety of screws, with high hardness and tensile strength. Its Rockwell hardness (HRC) can reach between 39-44, and its tensile strength can reach 1220N/mm2.
It is the best choice for FPV frame.