Rockwell hardness (HR) when HB> 450 or the sample is too small, can not be used to switch to Brinell hardness test Rockwell hardness measurement. It is an apex angle of 120 ° diamond cone or ball diameter 1.59,3.18mm, under certain load pressed into the surface of the material, determined by the depth of the indentation hardness of the material. Depending on the hardness of the test material, in three different scales to represent: HRA: 60kg load is the use of a diamond indenter and the pushing device obtained hardness, high hardness material (such as cemented carbide, etc.) is used. HRB: 100kg load and is using 1.58mm diameter hardened steel ball hardness tester manufacturers, hardness obtained for the lower hardness of the material (such as annealed steel, cast iron, etc.). HRC: 150kg load and is using a diamond indenter is remanded to obtain hardness, high hardness materials (such as hardened steel, etc.) are used. Webster Webster hardness durometer applications using two different shapes of the indenter hardness brand, two different test force, a combination of three different types of instruments constitute hardness, were used to test aluminum, soft copper, hard copper, hard aluminum and mild steel. Webster hardness tester is suitable for testing materials with two parallel surfaces, such as pipes, plates and profiles, maximum material thickness up to 13mm. Webster Hardness is very suitable for the production site for the detection of bulk products piece by piece, although its sensitivity is not high, but as production control and conformity determination instrument has been able to meet the requirements, it is for this reason, Webster Hardness in aluminum industry has been fairly widely used. Webster hardness tester on the market today mainly in W-20 Series Aluminum Webster Hardness based, as well as for the detection of copper alloy Webster hardness. Production durometer hardness _ _ Jinke instrumentation provided by Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Branch of the Instrument and you hand in hand into the brilliant, for a better future!