How do you test hardness of aluminum?
How do you test hardness of aluminum?
The indentation that is created in the metal is measured for its diameter. A Brinell hardness reading is obtained by dividing the load used (in Kg) by the area of the indentation in the casting being tested (in square mm). When measuring an aluminum alloy a 500Kg load is used, along with a sphere of 10mm.
What is the Brinell hardness of aluminum?
Aluminum 6061-T6; 6061-T651
| Physical Properties | Metric | English |
|---|---|---|
| Hardness, Brinell | 95 | 95 |
| Hardness, Knoop | 120 | 120 |
| Hardness, Rockwell A | 40 | 40 |
| Hardness, Rockwell B | 60 | 60 |
Which hardness tester is used for an aluminum bulk metal?
The Rockwell hardness test is the most used and versatile of the hardness tests. For soft materials such as copper alloys, soft steel, and aluminum alloys a 1/16″ diameter steel ball is used with a 100-kilogram load and the hardness is read on the “B” scale.
What is the Rockwell hardness of bronze?
| Physical Properties | Metric | English |
|---|---|---|
| Hardness, Rockwell C | 29 – 44 | 29 – 44 |
| Hardness, Rockwell F | 53 – 95 | 53 – 95 |
| Hardness, Rockwell 30T | 6.0 – 83 | 6.0 – 83 |
| Tensile Strength, Ultimate | 55.2 – 1010 MPa | 8000 – 147000 psi |
What I learned about Brinell hardness test?
The Brinell hardness test is commonly used to determine the hardness of materials like metals and alloys. The test is achieved by applying a known load to the surface of the tested material through a hardened steel ball of known diameter. It is desirable that the test load are limited to a impression diameter in the range of 2.5 to 4.75 mm.
What are the disadvantages of Brinell hardness test?
The main disadvantage of this test is that it is not suitable for small size objects due to large indentor impression.
Which variable affects the Brinell hardness test?
The Brinell hardness tester of Tianxing company assembles professional reading microscope to accurately read the diameter of indentation. The roughness, thickness, and curvature will all effect the test error. In general, the more rough the surface is, the smaller the hardness value will be.
What is Brinell and Vickers hardness test?
Making use of a diamond indenter, the Vickers hardness test is done with less force and more accuracy than the Brinell test. By magnifying the surface of a metal, this test can target specific microstructural constituents like martensite or bainite, or assess the quality of heat treating or surface hardening operations.