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There is no weld on the outer surface of seamless steel pipe, which is the change from round steel progressive perforation to hollow round bar, with good compression resistance. According to different materials, the processed finished products JIS SMA490CW hot rolled weathering steel are applicable to a wide range of fields (for example: machine gearbox gears, gear wheel axles, cams, worms, piston pins, claw clutches, high-pressure pipes and various fasteners, high-grade carburized parts, such as gears, shafts, etc.) in the medium containing nitrogen hydrogen mixture for fluid transmission. It can improve the utilization of materials.
As the thickness and hardness of JIS SMA490CW hot rolled weathering steel increase, the tendency to crack at the cutting edge increases. In order to prevent the JIS SMA490CW hot rolled weathering steel from cutting cracks, preheating should be carried out before JIS SMA490CW hot rolled weathering steel cutting. Special attention should be paid to preheating to make the entire JIS SMA490CW hot rolled weathering steel interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole JIS SMA490CW hot rolled weathering steel cannot be preheated, the partial preheating method can be used instead.
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