Stainless Steel Sheet 201 Grade, 201 Stainless Steel Sheet Sales, Today's Price Trend
The surface of the stainless steel plate features straight and fine grooves of varying depths. These grooves run parallel to the rolling direction, appearing continuously or intermittently, with irregular spacing and no fixed pattern. The scratches before leveling are smooth, and the color of the grooves is gray-black. After leveling, there are scratches, burrs, and a metallic sheen.
The cause is that parts with sharp edges or hard objects come into contact with the steel strip during pickling, rolling, leveling, and finishing processes, creating relative motion; various rolls on the finishing line (such as feeding rolls, pressing rolls, and guide plates) not operating lead to scratching; and changes in strip speed or relative movement between layers during unwinding or coiling.
When sorting a variety of scrap stainless steel with numerous specifications, the key is to first determine their respective uses before identifying the steel types. Generally, the classification of stainless steel is closely related to its applications, with the source primarily being discarded stainless steel utensils from daily life, which can only be recycled as furnace material. Next are kitchen equipment and tableware, which typically use grades 304 and 430 stainless steel. The food processing industry mainly produces machinery and containers for food processing, such as grain, beer and beverage, dairy processing equipment, and quick-freezing and refrigeration equipment, with primary steel types being 304, 321, 1cr13, and antimicrobial ferritic stainless steel. In industrial production, the scrap materials (new material) cut and pressed off include some directly usable pipes, rods, and plates, but in limited quantities. Urban landscape projects mainly use stainless steel welded pipes, while the automotive industry primarily uses ferritic stainless steel 409 for exhaust pipes. Other industries such as urban water supply, environmental protection, petrochemical, and power sectors also generate a significant amount of scrap stainless steel. The pump and container market for oil, gas, and acids is a major source of scrap stainless steel tanks, pipes, pumps, and valves, with the main steel type being 18/8 stainless steel.
