Seamless steel tube hardness testing
The hardness of seamless steel tubes is generally measured by three hardness indicators: Brinell, Rockwell and Vickers.
1. Brinell hardness
In the seamless steel tube standard, the Brinell hardness is widely used, and the hardness of the material is often expressed by the indentation diameter, which is both intuitive and convenient. However, it is not suitable for steel pipes of harder or thinner steel.
2. Rockwell hardness
The Rockwell hardness test of seamless steel tubes is the same as the Brinell hardness test, which is an indentation test method. The difference is that it measures the depth of the indentation. Rockwell hardness test is a widely used method, among which HRC is second only to Brinell hardness HB in steel pipe standards. Rockwell hardness can be used to measure metal materials from extremely soft to extremely hard. It makes up for the inadequacy of the Brinell method. It is simpler than the Brinell method, and the hardness value can be read directly from the dial of the hardness machine. However, due to its small indentation, the hardness value is not as accurate as the Brinell method.
3. Vickers hardness
The Vickers hardness test of seamless steel tubes is also an indentation test method that can be used to determine the hardness of very thin metal materials and surface layers. It has the main advantages of Brinell and Rockwell methods, and overcomes their basic shortcomings, but it is not as simple as the Rockwell method, and the Vickers method is rarely used in steel pipe standards.
Hunan Standard Steel Co.,Ltd: https://www.hu-steel.com
Address: 22nd floor golden tower, Changsha West International Central Mansion, Yuelu District, Changsha, Hunan, China
Seamless steel pipe: https://www.hu-steel.com/product85.html
ERW welded pipe: https://www.hu-steel.com/product90_985.html
Hunan Standard Steel Co., Ltd as a member of Husteel Industry Group, which has a complete system of production and sales serving our customers. Iron and steel as Hunan Standard Steel"s main business,manufacturing premium steel products and a high added value.
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