Rockwell Hardness Testing and the ASTM E 18-03 Standard
Rockwell Hardness testing is a system for determining hardness of metallic material. The E 18-03 standard established by ASTM is a detailed description of the Rockwell Hardness testing method.
A 120 degree angle diamond or 1/16” (1.588mm) diameter hard steel ball indenter is pressed into the test piece surface with a preliminary force Po (10kgf) at a depth Do. Then, a main force P1 is added until the total test force, P = Po + P1, is 60kgf for HRA, 100kgf for HRB and 150kgf for HRC, and the indenter increases to a depth D2. Then, the preliminary force Po is unloaded, and the indenter decreases to a depth D1. This results in a depth difference, e = D1 – Do, measured in units of 0.002mm. The hardness reading for HRA and HRC is 100-e, and for HRB is 130-e
RH-150 便携洛氏硬度仪详细参数和配置
测试范围: 20-88 HRA 20-100 HRB 20-70 HRC
硬度标尺: HRA, HRB, HRC, HV, HB
换算强度: 110-363 Lb/ln2 77 – 266 Kg/cm2
测试精度: 0.5HRC (基于 55-68HRC)
测试温度: 测试 32 °F to 104 °F (0 °C to 40 ° C) 存放 4 °F to 122 °F (-15 °C to 50 ° C)
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