Stainless steel is used in a wide range of applications, and it has a large family system. Each steel grade has a specific application area. Stainless steels can be classified according to their organization into austenitic, ferritic and martensitic steels, as well as duplex and precipitation-hardening stainless steels. They all contain at least 10.5 chromium, and the better grades also contain nickel. Controlling the different elements can give stainless steels specific mechanical properties.
With the development of science and technology and industry, higher requirements for materials, such as higher strength, resistance to high temperature, high pressure, low temperature, corrosion resistance, wear and other special physical and chemical properties of the requirements.
Carbon structural steel is a carbon steel containing less than 0.8 carbon, this steel contains less sulfur, phosphorus and non-metallic inclusions than carbon structural steel, mechanical properties are better. But the price will also be a little higher than Q235.
Steel sometimes shows some defects, such as scratches, scrapes, holes, scars, pad pits and other surface abnormalities. After much understanding by the double flange dismantling joint manufacturer, the reasons for these situations are none other than these.
1. incorrect press-fold roll type
2. surface bubbles
3. Cracking of the casting block The amount of pressure under the hot rolling is too large, cracking from the end of the ingot; the heating temperature of the casting block is too high or too low.
4. Unqualified mechanical properties
5. Ingot slagging Bad melt casting quality, metal or non-metal slagging in the plate.
6. Tearing
7. Too thin The amount of press down is not correctly adjusted; the thickness gauge is faulty or improperly used; the roll type is not correctly controlled.
