A detailed explanation of the differences between 20G and 20g
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1. Yield strength: The yield strengths of the two materials at 20°C are different; that of 20g is 225 MPa； 20G is 216 MPa2; maximum operating temperature: 20G is 450℃ ； 20G refers to seamless steel tubes used in high-pressure boilers; the letter G in 20G is pronounced as “gao”, meaning 20 Gao ； 20g refers to boiler plates; the ‘g’ in 20g should be read as “boiler”, meaning 20 boilers. 4. Others: 20G is in the form of tubing, while 20G is in the form of sheet metal. Apart from having the same carbon content, 20G also contains certain trace elements that give it properties more suitable for use in boiler and pressure vessels. 20g also places emphasis on testing its physical properties. Such as bending, impact, and tensile properties.
It was my first time learning this; thank you
20G is a seamless steel tube used in high-pressure boilers; the letter G in 20G stands for “high”, that is, 20 High； 20g refers to boiler plates; the ‘g’ in 20g should be read as “boiler”, meaning 20 boilers. It was useful; I learned something from it. It is used on steam pipes.
Unified grade standards have been adopted for carbon steel and low-alloy steel; the way materials are designated has changed, but it’s still useful to review the history
The materials are all the same now, right?
Thank you to the original poster and everyone above. I’ve learned it.*
Thank you for sharing:victory::victory::victory:
In the old standards, such jokes used to happen frequently
20G is a seamless steel tube used in high-pressure boilers; the letter G in 20G stands for “high”, that is, 20 High； 20g refers to boiler plates; the ‘g’ in 20g should be read as “boiler”, meaning 20 boilers. It was useful; I learned something from it. It is used on steam pipes.
Adding a comparison of the standard sources makes it easier to explain the origins of these two grades.