Stainless steel pipe what hardness index

Release Time :

2022-10-27 13:36

Stainless steel pipes are commonly used to measure the hardness of Brinell, Rockwell, Vickers three hardness indexes.
Brinell hardness
In the stainless steel pipe standard, Brinell hardness is the most widely used, often to indentation diameter to indicate the hardness of the material, both intuitive and convenient. But for harder or thinner steel pipe is not suitable.
Rockwell hardness
The Rockwell hardness test for stainless steel pipe is the same as the Brinell hardness test. The difference is that it measures the depth of the indentation. Rockwell hardness test is a widely used method at present, and HRC is second only to Brinell hardness HB in steel pipe standard. Rockwell hardness can be applied to the determination of very soft to very hard metal materials, it makes up for the Brinell method is not, more simple than Brinell method, can be directly from the hardness machine dial read hardness value. However, because of the small indentation, the hardness value is not as accurate as the Brinell method.
Vickers hardness
The Vickers hardness test for stainless 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 process and overcomes their basic disadvantages, but it is not as simple as Rockwell process and Vickers method is rarely used in steel pipe standards.
Hardness testing
For annealed stainless steel pipes with inner diameter above 6.0mm and wall thickness below 13mm, W-B75 Wechls hardness tester can be used. The test is very fast and simple, which is suitable for rapid and nondestructive qualified inspection of stainless steel pipes. The HRB and HRC hardness of stainless steel tubes with inner diameter greater than 30mm and wall thickness greater than 1.2mm are tested by Rockwell hardness tester. For stainless steel tubes with inner diameter greater than 30mm and wall thickness less than 1.2mm, use surface Rockwell hardness tester to test HRT or HRN hardness. For stainless steel pipes with inner diameter less than 0mm and greater than 4.8mm, the hardness of HR15T is tested by Rockwell hardness tester dedicated to pipe. When the inner diameter of the stainless steel pipe is greater than 26mm, Rockwell or surface Rockwell hardness tester can also be used to test the hardness of the inner wall of the pipe.

Application field of square tube

Application: Widely used in machinery manufacturing, construction industry, metallurgical industry, agricultural vehicles, agricultural greenhouses, automobile industry, railway, highway guardrail, container skeleton, furniture, decoration and steel structure fields.

2022-10-27

Effect of adding elements to galvanized steel pipe on its properties

Inrecent years, ITU argon pipeline welding method has been widely usedin petrochemical industry, power construction and energy system.Different from the common arc extinguishing and priming process ofmanual arc welding, manual arc welding fills the cover surface.

2022-10-27

Stainless steel pipe what hardness index

In the stainless steel pipe standard, Brinell hardness is the most widely used, often to indentation diameter to indicate the hardness of the material, both intuitive and convenient. But for harder or thinner steel pipe is not suitable.

2022-10-27

What are the classifications of seamless steel pipes

The materials are ordinary and high quality carbon structural steel (Q215-A ~ Q275-A and No. 10 ~ 50 steel), low alloy steel (09MnV, 16Mn, etc.), alloy steel, stainless acid resistant steel, etc. According to the purpose, it is divided into general purpose (for water and gas pipelines and structural parts, mechanical parts) and special purpose (for boiler, geological exploration, bearing, acid resistance, etc.).

2022-10-27

Performance of square pipe

Square pipe, square pipe and rectangular pipe is a kind of address, that is, the side length is equal and unequal steel pipe. It is made of strip steel through processing and rolling. Generally, strip steel is unpacked, leveled, crimped, welded to form a round tube, which is then rolled into a square tube and cut to the required length.

2022-10-27

Corrosion resistance of welded steel tubes

In the production of T-welded steel pipe, the wrong edge often occurs, and there are many influencing factors. In production practice, steel pipe is often degraded by the wrong edge. Therefore, it is necessary to analyze the causes of spiral steel pipe misalignment and its preventive measures.

Shandong Xinghan Aluminum Industry Group Co., Ltd.

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