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- Boiler steels
- High carbon steel
- High Yield steel
- steel for welded tubes
- General construction steel
- steel with Cr.,Mo.,Cr-Mo
- Steel for large diameter pipes
- Simple pressure vessels steel
- Steel for gas cylinders and gas vessels
- General purpose structural steels
- Steel for boilers and pressure vessels
- steel resistant to atmospherical corrosion
- Carbon steel and low alloy steel
- Fine-grain structural steels,normalised rolled
- weldable normalized fine grained pressure vessel steels
Three characteristics of oxidation of Q345B thick-walled seamless pipe
1. Processing technology: This is also one of the factors that cause oxidation of Q345B thick-walled seamless pipes. From the perspective of manufacturing technology and product characteristics, a thin oxide film is formed on the surface of Q345B thick-walled seamless pipes to prevent the occurrence of oxidation. The basic processing technology for oxidation is also one of the main characteristics that distinguish stainless steel products from other steel products. However, when the oxide film is not detailed or continuous due to insufficient processing technology or carelessness, the oxygen in the air will immediately react with it. Some elements in the product undergo an oxidation reaction, which in turn causes the product to undergo an oxidation state.
2. Product composition control: In order to reduce product costs, some processing manufacturers further reduce the percentage composition of some main elements such as chromium and nickel, and expand other components such as carbon, etc., which are not strictly in accordance with the product model Specifications, Q345B thick-walled seamless pipe product characteristics to carry out the production status of composition control, not only greatly affects the quality of Q345B thick-walled seamless pipe, for example, when the proportion of chromium in 304 stainless steel pipe is insufficient, it will not only affect the quality of Q345B thick-walled seamless pipe the corrosion resistance and formability of seamless pipes have uncertain quality and safety risks for Q345B thick-walled seamless pipes when they are used in chemical plants, machinery and equipment, and processing and manufacturing fields; at the same time, they also affect the shape and oxidation resistance of products. characteristic.
3. Human factors: This is also one of the reasons for product oxidation that some customers are prone to encounter when using Q345B thick-walled seamless pipe products. Some customers use it unreasonably in product application and maintenance, especially for food chemical machinery Q345B thick-walled seamless pipe products in the field of equipment have a high probability of being oxidized due to human factors. In view of the oxidation of Q345B thick-walled seamless pipes caused by human factors, it is necessary to have appropriate product application expertise and regularly carry out effective maintenance, thereby reducing the oxidation caused by improper handling of human factors.