Up knowledge, what is the soft and hard of stainless steel pipe fittings expressed by?
Stainless steel is certainly familiar to everyone. It can be seen everywhere in life, such as stainless steel thermos cups, stainless steel bowls, etc. in fact, stainless steel pipe fittings are widely used in food and medical treatment, metal products, mechanical equipment and other industries. According to different specific uses, people have different requirements for the hardness of stainless steel pipe fittings. If you loose Xiaobian, please give us a popular science: what parameters are used to express the hardness and softness of stainless steel pipe fittings? In fact, Brinell, Rockwell and Vickers indexes are mainly used to measure the hardness of stainless steel pipe fittings. Different methods have the following differences:
1. Vickers hardness (HV)
Vickers hardness test of stainless steel pipe fittings is an indentation test method, which can be used to measure the hardness of very thin metal materials and surface layers. It has the main advantages of Brinell and Rockwell test methods, but it is not as simple as Rockwell method, and Vickers method is rarely used in the standard of stainless steel pipe fittings. However, Vickers hardness tester has a wide measurement range and can measure almost all metal materials used in industry.
2. Brinell hardness (HB)
In the standard of stainless steel pipe fittings, Brinell hardness is the most widely used. Indentation diameter is often used to express the hardness of materials, which is intuitive and convenient. However, it is not suitable for harder or thinner steel and steel pipes.
3. Rockwell hardness (HR)
Rockwell hardness, like Brinell hardness test, uses indentation test method. But it measures the depth of the indentation. Rockwell hardness test is a widely used method at present, but there are three standards for Rockwell hardness grade: A, B and C, which are usually recorded as HRA, HRB and HRC. The representation method is hardness data and hardness symbol. Among them, HRC is second only to Brinell hardness Hb in steel pipe standards. Rockwell hardness can be used to measure metal materials from very soft to very hard, and the hardness value can be read directly from the dial of the hardness tester. However, the hardness value is not as accurate as Brinell method. When the test sample is too small or the Brinell hardness (HB) is greater than 450, Rockwell hardness measurement shall be used.
Ruosung stainless steel pipe fittings manufacturer strictly adheres to the requirements of ISO9001 quality management system to realize the trinity of post self inspection, process mutual inspection and inspector special inspection, so as to prevent unqualified products from flowing into customers.