Brinell hardness of carbon steel pipe

Brinell hardness (HB) with a certain diameter of the steel balls or tungsten carbide balls, pressed into the pattern surface of a predetermined test force (F), after the predetermined hold time after drop test force, the diameter of the measurement sample surface indentation (L).

Brinell hardness test force divided by the the indentation spherical surface area quotient. To HBS (Ball Ball Ball Ball) the unit N/mm2 (MPa). The formula is: where: F - pressed into the metal surface of the sample test force, N; D - test steel ball diameter, mm; d - indentation average diameter mm.

Brinell hardness was measured more accurate and reliable, but generally HBS only applies 450N/mm2 (MPa) or less of a metal material, for the harder steel, or thin sheet NA. Steel standards, Brinell hardness is the most widely used, and often said that the hardness of the material, the indentation diameter d both intuitive and convenient.

Brinell hardness is the most widely used methods in carbon steel pipe hardness testing . This method uses the earliest, due to its imprint, and thus the hardness values ​​affected by the sample organization microsegregation ingredients uneven minimal impact, test results points sprinkle a small degree, good reproducibility, can objectively reflect the objective hardness of the material. 

Principle: In a predetermined detection force, a certain diameter of the steel ball is pressed into the specimen surface to maintain a certain time, and then removing the detected force, the pressure imprint diameter measurement on the specimen surface, can be calculated based on the diameter of the pressure imprint pressure marks the gravure area.

Brinell hardness test force divided by the the indentation spherical surface area quotient. Unit 9.807N/mm. The indentation Big steel ball pressed into the deep, low hardness values​​; vice versa hardness values ​​to engage.

Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

Link exchange

Copyright © 2011 Sunny Steel Enterprise Ltd.  All Rights Reserved ICP No.:08010763