Although 20 steel seamless steel pipe and 20g seamless steel pipe are both seamless steel pipes, there are certain differences in material, use and process.
First of all, from the perspective of material, No. 20 steel seamless steel pipe refers to a seamless steel pipe made of No. 20 high-quality carbon structural steel as raw material, while 20g seamless steel pipe refers to a seamless steel pipe made of 20g seamless steel pipe for high-pressure boiler as raw material. No. 20 high-quality carbon structural steel is an ordinary carbon structural steel, which has good mechanical properties and processing properties, but is not suitable for use in special environments such as high temperature and high pressure. The seamless steel tube for 20g high-pressure boiler is a seamless steel tube specially used in the manufacture of high-temperature and high-pressure equipment such as high-pressure boilers, which has higher mechanical properties and corrosion resistance.
Secondly, from the perspective of use, 20 steel seamless steel pipe is mainly used for manufacturing general structural parts, fluid transportation pipelines, radiators, instruments and other conventional purposes, while 20g seamless steel pipe is mainly used to manufacture high-temperature and high-pressure equipment, such as boilers, reactors, etc.
Finally, from the process point of view, 20 gauge seamless steel pipes are usually made by hot rolling or cold drawing process, while 20g seamless steel pipes are usually made by heat treatment process. The hot rolling process is to heat the billet and roll it to form a pipe;In the cold drawing process, the billet is heated and drawn to form a thinner tube. The heat treatment process is to make the internal structure of the steel pipe more uniform through high temperature treatment, and improve its mechanical properties and corrosion resistance.
To sum up, there are obvious differences between 20 steel seamless steel pipe and 20g seamless steel pipe in terms of material, use and process. When choosing to use, it is necessary to choose the appropriate type of seamless steel pipe according to the specific use environment and requirements.