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whats HRA

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HRA

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  • 0862400712

    0862400712 2017-12-29 11:39:07

    The Rockwell scale is a hardness scale based on indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload.[1] There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, HRB, HRC, etc., where the last letter is the respective Rockwell scale (see below). When testing metals, indentation hardness correlates linearly with tensile strength.[2] This important relation permits economically important nondestructive testing of bulk metal deliveries with lightweight, even portable equipment, such as hand-held Rockwell hardness testers

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  • 0864574958

    0864574958 2017-10-27 10:39:22

    HRA is made of 60Kg load and diamond cone press the hardness obtained for the higher hardness of the material. For example: steel sheet, carbide.

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  • 0864574958

    0864574958 2017-10-25 11:39:09

    Rockwellhardness (Rockwellhardness), which is made by Rockwell (SPRockwell) in 1921, is the use of Rockwell hardness measured metal hardness value. The value of no units, only code-named "HR" , The measurement method is, under the provisions of the external load, the ball or diamond indentation into the surface of the material to be tested, resulting in dent, according to the depth of the load after the removal of the depth, the use of Rockwell hardness formula HR = (KH) / C Rockwell hardness can be calculated Rockwell hardness value displayed on the dial of the hardness tester can be read directly.

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  • 0865598567

    0865598567 2017-10-25 11:09:01

    HRA is made of 60Kg load and diamond cone press the hardness obtained for the higher hardness of the material. For example: steel sheet, carbide.

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