SA 213 boiler tube hardness

The most common way to test the hardness of a SA 213 boiler tube is to use a rasp to wipe the edge of the workpiece and to scrape the depth of the surface to determine its hardness,whose method is not scientific. Hardness tester to test is extremely accurate, is a modern test hardness commonly used method. The most commonly used test method is rockwell hardness test. Rockwell hardness testing machine use diamond into the metal depth to determine the hardness of boiler tube, into the depth of the larger, the smaller the hardness. Diamond into the metal depth, can be pointed out from the pointer the correct number, the number is called rockwell hardness.

Forging
It is a hammer to make the metal into a certain shape <forming> method, when the SA 213 boiler tube heating to the forging temperature, you can engage in forging, bending, drawing, forming and other operations. Most high-pressure boiler tubes are heated to fresh cherry red when they are easy to forge.

Brittleness
Said the characteristics of high-pressure boiler tube is easy to rupture, cast iron brittle, and even fall on the ground will burst.

Ductility
(Also known as softness) is the permanent deformation of the metal by the external deformation of the nature, ductility of the high-pressure boiler tube can be drawn into a thin line.

Elasticity
It is a high-pressure boiler tube by external force deformation, when the external force after the restoration of its original shape to restore a nature. Spring steel is a very flexible material.

Hardness
It is a metal resistance to foreign objects into the cutting or cutting a high pressure boiler tube can increase the hardness of the commonly used method is quenching.

Exhibition
Also known as malleable, is the metal ductility or flexibility of another representation. Development is a metal to accept hammer forging or rolling and deformation does not break a nature.

Toughness
It is the ability of high pressure boiler tubes to withstand shock or shock. Toughness and brittle just the opposite.