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How is the hardness and softness of stainless steel pipe fittings indicated
Everyone knows that stainless steel pipe fittings are widely used in industries such as food and medical, metal products, and mechanical equipment. Depending on the specific application, the hardness requirements for stainless steel pipe fittings vary. Today, I will introduce to you: What parameters are used to indicate the hardness of stainless steel pipe fittings?
The most commonly used indicators for measuring the hardness of stainless steel pipe fittings include Brinell, Rockwell and Vickers. The differences among these methods are as follows:
Vickers Hardness (HV)
The Vickers hardness test for stainless steel pipe fittings is a indentation testing method, which can be used to measure the hardness of very thin metal materials and surface layers. It has the main advantages of the Brinell and Rockwell testing methods, but unlike the Rockwell method, it is not as simple. Moreover, the Vickers method is rarely used in the standards for stainless steel pipe fittings. However, the Vickers hardness tester has a wide measurement range and can measure almost all the metal materials currently used in industry.
2. Brinell Hardness (HB)
In the standards for stainless steel pipe fittings, the Brinell hardness is the most widely used. The diameter of the indentation is commonly used to represent the hardness of the material, which is intuitive and convenient. However, it is not applicable to harder or thinner steel and steel pipes.
3. Rockwell Hardness (HR)
The Rockwell hardness test, like the Brinell hardness test, uses the indentation test method. However, it measures the depth of the indentation. The Rockwell hardness test is currently a widely used method, but there are three standards for Rockwell hardness grades: A, B, and C, usually denoted as HRA, HRB, and HRC. The representation method is the hardness symbol of the hardness data. Among them, HRC is used in steel pipe standards after HB, ranking second. The Rockwell hardness can be used to measure metal materials ranging from extremely soft to extremely hard, and the hardness value can be directly read from the scale of the hardness tester. However, the hardness value is not as precise as the Brinell method. When the test sample is too small or the Brinell hardness (HB) is greater than 450, the Rockwell hardness measurement is used.
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