Brief Introduction of Brinell Hardness Tester

Introduction

Brinell hardness tester is mainly used for hardness determination of cast iron, steel, nonferrous metals and soft alloy materials. Brinell hardness test is the biggest indentation test of all test method. It is a high accuracy hardness test method, as it can reflect the comprehensive performance of the material without  effected by the microscopic segregation of the specimen and the uneven composition. It is widely used in metallurgy, forging, hardened steel and nonferrous metals and other industrial fields, laboratories, universities and scientific research units.

Product description
Brinell hardness tester can be used to test castings, forgings, supplied steel, nonferrous metals and semi-finished steel parts after heat treatment. This is a portable instrument that can be used in the workshop. It is easy to operate and carry. It can test large parts without any sampling on site. It can realize the detection of large parts by piece.
Brinell hardness tester is mainly used for the hardness test of forged steel and cast iron with uneven organization, the Brinell hardness of forged steel and gray cast iron has a good correspondence with and tensile test. Brinell hardness test can also be used for non-ferrous metals and mild steel, small diameter ball head can be used to measure small size and thin materials. Brinell hardness tester mainly used for the detection of raw materials and semi-finished products. Due to large indentation, it is not used for finished product testing generally.

The choice of Brinell hardness test conditions is the same with the choice on scale of Rockwell hardness test. Brinell hardness test also encountered the choice of test conditions, that is the choice of test force F and pressure ball diameter D. This choice is not arbitrary, but to follow certain rules and pay attention to the reasonable match of the test force and pressure ball diameter. Therefore, its application is slightly complex than Rockwell hardness test.
Principle

The working principle of Brinell hardness tester is to press the ball of certain diameter into the sample surface under a certain test force and a certain rate, remove the test force after the specified test force maintain time. The Brinell hardness value of the metal is expressed by the average pressure on the spherical surface area of the sample indentation.

Measuring range
Portable Brinell hardness tester is the same with King Brinell hardness tester. Before coming out of the factory, it can be selected 500kg, 750kg, 1000kg, 1500kg, 3000kg test force, 5mm or 10mm ball head according to user requirements. It can test aluminum, copper, copper alloy, steel, iron and other common metal materials.
Brinell hardness (HB): a certain test force such as: 187.5kg \ 250kg \ 3000kg load with a certain diameter of the ball or carbide ball press into the material surface to maintain a period of time. After loading, load and the ratio of indentation area is the Brinell hardness value (HBS \ HBW) and the unit is N / mm2. Brinell hardness tester is suitable for measuring cast iron and other workpiece of high hardness materials. In the steel pipe standard, Brinell hardness is the most widely used with indentation diameter d to represent the hardness of the material, both intuitive and convenient.

Introduction:
Hardness is one of the important indexes of mechanical properties of materials, and hardness test is an important means to judge the quality of metal materials or parts. Since the hardness of the metal has a corresponding relationship with other mechanical properties, most metal materials can be used to approximate other mechanical properties, such as strength, fatigue, creep and wear by measuring the hardness. Digital Rockwell hardness tester has a large screen display with good reliability, operability and intuitive. It is a high-tech products combined with electromechanical. The main functions are as follows: Rockwell hardness scale selection; plastic Rockwell scale selection (special requirements, according to the contract supply); the conversion value of the hardness scale between; hardness test results print output; RS232 terminal set for the user extensions. It is suitable for the hardness determination of quenching, tempering, annealing, chilled castings, malleable castings, carbide steels, aluminum alloys, copper, bearing steel and others. It is ideal hardness tester for testing the Rockwell hardness of hardened metal, nonferrous metal and non-metallic materials.

Technical Parameters
1. Initial test force: 98.07N (10kg)  Tolerance ± 2.0%
2. Total test force: 588.4N (60kg), 980.7N (100kg), 1471N (150kg)  Tolerance ± 1.0%
3. Indenter specifications: diamond Rockwell indenter φ1.5875mm ball head
4. Power supply voltage: AC220V ± 5%, 50 ~ 60Hz
5. Delay control: 2 ~ 60 seconds adjustable
6. Maximum height allowed to be tested: 175mm
7. Distance between head center to the fuselage : 165mm
8. Hardness gauge dimensions: 520 × 215 × 700 (mm)
9 Hardness meter weight about: 78kg

Annex
※ Pressure head: one diamond Rockwell indenter, one φ1.588 ball indenters
※ Test bench: one big flat test bench, one medium flat test bench, one V-type test bench
※ Standard Rockwell Hardness Block:
One HRB high block (85-100), one HRC high block (60-70), one HRC low block (20-30) 
※ Fuse: one 2A2 
※ power cord: one 
※ level: one
※ weight: one weight A, one weight B, one weight C 
※ Horizontal adjustment screw: four 
※ screw: one
※ stay wrench: one
※ Printer manual: one 
※ Product manual: one
※ Product certificate: one