A flange is a disc shaped component that is most common in pipeline engineering. The flanges are used in pairs and in conjunction with the matching flanges on the valve. In pipeline engineering, flanges are primarily used for the connection of pipelines. In the pipeline where the requirements are connected, various devices have a flange plate.
Comparison between stainless steel flanges and carbon steel flanges:
1. The thermal conductivity is low, about one-third of that of carbon steel. To prevent eye to eye corrosion caused by heating of the flange cover, the welding current should not be too large, which is about 20% less than carbon steel welding rods. The arc should not be too long, and the interlayer cooling should be fast. It is advisable to use a narrow welding pass.
2. The electronegative rate is high, about 5 times that of carbon steel.
3. The coefficient of linear expansion is large, 40% higher than that of carbon steel, and as the temperature increases, the value of the coefficient of linear expansion also increases accordingly.
Carbon steel is an iron carbon alloy with a carbon content ranging from 0.0218% to 2.11%. Also known as carbon steel. Generally, it also contains small amounts of silicon, manganese, sulfur, and phosphorus. Generally, the higher the carbon content in carbon steel, the greater the hardness and strength, but the lower the plasticity.
What are the differences between low-carbon steel, medium carbon steel, and high carbon steel?
1. Low carbon steel is a type of carbon steel with a carbon content of less than 0.25%, including most ordinary carbon structural steel and some high-quality carbon structural steel, most of which are used for engineering structural components that do not require heat treatment. Some also undergo carburization or heat treatment.
2. Medium carbon steel has good Hot working and cutting properties, but poor welding properties. Its strength and hardness are higher than low-carbon steel, while its plasticity and toughness are lower than low-carbon steel. Cold rolling and other processes can be directly used for cold processing without heat treatment, or machining or forging can be carried out after heat treatment. The hardened medium carbon steel has excellent comprehensive mechanical properties. The maximum hardness achievable is approximately HRC55 (HB538), σ B is 600-1100MPa. Therefore, medium carbon steel is widely used in various applications with medium strength levels. It is not only widely used as a building material, but also for manufacturing various machine parts.
3. High carbon steel is often called Tool steel, and its carbon content is 0.60%~1.70%. It can be quenched and tempered, and its welding performance is poor. Hammers, crowbars, etc. are all made of steel with a carbon content of 0.75%. Cutting tools such as drills, taps, and reamers have a carbon content of 0.90%
Post time: Jun-08-2023
