HARDNESS TESTERS - Hardness test machines
or portable hardness testers

Miller's Tooling Pty Ltd sells portable hardness testers that measure in Rockwell C scale ( Rc). Rockwell C scale ( Rc), hardness test is the major hardness recognised for measuring hardness of steels in Australia.
Also hardness testers that measuring range： (170-960)HLD, (17-68.5)HRC, (19-651)HB, (80-976)HV, (30-100)HS, (59-85)HRA, (13-100)HRB.

Hardness Test Files Set ( Made in Japan)

As simple experimental tools for hardness testing between HRC40 ～ 65
Pocketable; convenient to use while there's no place to hang up for the experimental equipments like large-scale tools, outdoor special steels and etc.
Before cutting, carring a set of the files could be effectively used for material hardness test, qualified hardness test after heat treatment and others.

Use
• Simple to use on site, just file with the hardest file (65Rc), if it cuts job, step down to next file (softer grade - 60Rc), continue this, until a file slips. Then the job's hardness is between those two files hardness rating ( within 1 - 2 Rc)
• Six pieces a set, hardness is differentiated by handle colours.
• Non-slip handle, easy to use.
• Using of directions: remove the rust blemish on materials before use; punctured by detector and then scratch; if the material is damaged, the hardness should be lower than detector's indication.
• If there's no damage, use the detector above grade one; As the front of detector has taken a bending processing, the hardness test is applicable for flat surface, curving surface and inner-edge surface.

Rockwell Hardness Testers
How they are used and which model type is best for you?

The Rockwell Hardness Test Scale is used to rank the hardness of steels, and it is widely used in the fields of metallurgy and engineering. The Rockwell hardness test uses indentation to test the hardness of a material. Each different Rockwell hardness test scale uses a different indenter and load weight to test the material. The results of the hardness test are given a code that includes HR and then the scale letter, i.e. HRA or HRB.

To evaluate steel hardness, Rockwell hardness testers use a differential-depth method. The test consists of placing an indenter on the material, then applying a minor load, which establishes the zero position. After the minor load, a major load is applied and then removed while the minor load is maintained. The difference in depth between the minor and major loads determines the hardness. A dial or display shows the depth of penetration, and a higher number equals a harder material. Rockwell hardness testers are particularly useful because of their simplicity; they eliminate the extensive calculations used by other methods. The Rockwell test is also popular because of its reliability of results and the very small indentation to the material.

Generally, material to be tested should be at least ten times the depth of the indentation, but if very thin or brittle materials need to be tested, a superficial Rockwell scale is used. It makes a much shallower indentation and uses a lower load to avoid damaging materials like ceramics and sheet metal.

Rockwell Hardness Testers vary for different uses, but they fall into one of three basic categories:

Bench hardness tester models . Often found in testing laboratories and workshops, these testers are built to sit atop a work bench and test sample blocks. Bench models come in two types:
Analog hardness tester models display the test result through a dial on the front of the machine. They are simple and easy to use and very accurate.
Digital hardness tester models display the test result on a screen. They often have multiple functionalities for various tests, so they are versatile, but require more training to operate.
Portable hardness tester models . These testers are generally used to test very large metal parts (at least 1" thick). They use a digital screen, and can be programed to test using multiple hardness scales. By far the most economic choice for a hardness tester.

Whether you choose a bench model hardness tester or a portable hardness tester, all Rockwell hardness testers need to be calibrated with standard Rockwell test blocks. Rockwell test blocks are pieces of steel, brass, or aluminum that have been specially heat treated and calibrated for consistency. By using a test block, Rockwell hardness testers can be calibrated for optimal precision. Test blocks are calibrated to ASTM E18, ANSI (NCSL)Z540-1, (ISO) 10012-1, ISO/IEC 17025, and ISO 6508.