20G high-pressure boiler pipe forging is a method of shaping metal using hammering, which can be carried out upon heating the boiler pipe to the forging temperature, including forging, bending, drawing, and forming operations.

Most high-pressure boiler tubes are easy to forge when heated to a distinct cherry red. Hardness (Hardness)

It is the ability of a material to resist penetration by foreign objects. The common method to test the hardness of high-pressure boiler tubes is to file along the edge of the workpiece, and the depth of the scratches on the surface determines the hardness level.

This method is known as the filing test, which is not very scientific. Testing with a hardness tester is extremely accurate and is a commonly used method for modern hardness testing. Common testing methods include the Rockwell hardness test.

The Rockwell hardness tester determines the hardness of high-pressure boiler pipes by measuring the depth of penetration of a diamond into the metal; the greater the penetration depth, the lower the hardness. The depth of penetration of the diamond into the metal can be read from the pointer, which indicates the correct number, known as the Rockwell hardness number. Hardening (also known as quenching) involves uniformly heating high-pressure boiler pipes to an appropriate temperature and then rapidly immersing them in water or oil to cool them quickly, or cooling them in air or a freezing zone, to achieve the desired hardness.