1.1换算表1给出了非奥氏体钢（包括锻态、退火态、正火态的碳素钢、合金钢和工具钢）的布氏硬度、维氏硬度、洛氏硬度、洛氏表面硬度、努氏硬度和硬度之间关系的洛氏C硬度范围内的数据，淬火和回火条件，前提是它们均匀。 1.2换算表2给出了非奥氏体钢（包括锻态、退火态、正火态的碳钢、合金钢和工具钢）的布氏硬度、维氏硬度、洛氏硬度、洛氏表面硬度、努氏硬度和硬化硬度之间关系的洛氏B硬度范围内的数据，淬火和回火条件，前提是它们均匀。 1.3换算表3给出了镍和高镍合金（镍含量超过50%）的布氏硬度、维氏硬度、洛氏硬度、洛氏表面硬度和努氏硬度之间的关系数据。这些硬度转换关系旨在特别适用于以下情况:按照商业工厂硬度测试标准加工的镍铝硅试样，涵盖这些合金从退火到严重冷加工或时效硬化条件（包括中间条件）的整个范围。 1.4换算表4给出了筒状黄铜的布氏硬度、维氏硬度、洛氏硬度和洛氏表面硬度之间关系的数据。 1.5换算表5给出了退火条件下奥氏体不锈钢板的布氏硬度和洛氏B硬度之间关系的数据。 1.6换算表6给出了奥氏体不锈钢板的洛氏硬度和洛氏表面硬度之间关系的数据。 1.7换算表7给出了铜的布氏硬度、维氏硬度、洛氏硬度、洛氏表面硬度和努氏硬度之间关系的数据。 1.8换算表8给出了合金白口铁的布氏硬度、洛氏硬度和维氏硬度之间关系的数据。 1.9换算表9给出了变形铝产品的布氏硬度、维氏硬度、洛氏硬度和洛氏表面硬度之间关系的数据。 1.10本文中给出的许多转换值是从实际测试数据的计算机生成曲线中获得的。大多数洛氏硬度值精确到0.1或0.5硬度值，以便准确再现这些曲线。然而，由于所有转换后的硬度值必须视为近似值，因此所有转换后的洛氏硬度值应根据规程E 29四舍五入至最接近的整数。 1.11附录X1附录X9包含分别根据表1-9中的数据得出的方程，用于从一个硬度标度转换为另一个硬度标度。然而，由于所有转换后的硬度值必须视为近似值，所有转换后的硬度值应根据规程E 29四舍五入。 1.12仅当无法在规定的条件下测试材料时，才应使用硬度值的转换，并且当进行转换时，应酌情在受控条件下进行。每种类型的硬度测试都有一定的误差，但如果仔细观察预防措施，则压痕类型仪器上的硬度读数的可靠性将具有可比性。给定硬度标度范围内的灵敏度差异（例如，洛氏硬度B）可能大于两种不同标度或类型仪器之间的灵敏度差异。无论是从表格中还是从方程中计算出的转换值都只是近似值，对于特定应用而言可能不准确。

1.1 Conversion Table 1 presents data in the Rockwell C hardness range on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, Rockwell superficial hardness, Knoop hardness, and Scleroscope hardness of non-austenitic steels including carbon, alloy, and tool steels in the as-forged, annealed, normalized, and quenched and tempered conditions provided that they are homogeneous. 1.2 Conversion Table 2 presents data in the Rockwell B hardness range on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, Rockwell superficial hardness, Knoop hardness, and Scleroscope hardness of non-austenitic steels including carbon, alloy, and tool steels in the as-forged, annealed, normalized, and quenched and tempered conditions provided that they are homogeneous. 1.3 Conversion Table 3 presents data on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, Rockwell superficial hardness, and Knoop hardness of nickel and high-nickel alloys (nickel content over 50 %). These hardness conversion relationships are intended to apply particularly to the following: nickel-aluminum-silicon specimens finished to commercial mill standards for hardness testing, covering the entire range of these alloys from their annealed to their heavily cold-worked or age-hardened conditions, including their intermediate conditions. 1.4 Conversion Table 4 presents data on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, and Rockwell superficial hardness of cartridge brass. 1.5 Conversion Table 5 presents data on the relationship between Brinell hardness and Rockwell B hardness of austenitic stainless steel plate in the annealed condition. 1.6 Conversion Table 6 presents data on the relationship between Rockwell hardness and Rockwell superficial hardness of austenitic stainless steel sheet. 1.7 Conversion Table 7 presents data on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, Rockwell superficial hardness, and Knoop hardness of copper. 1.8 Conversion Table 8 presents data on the relationship among Brinell hardness, Rockwell hardness, and Vickers hardness of alloyed white iron. 1.9 Conversion Table 9 presents data on the relationship among Brinell hardness, Vickers hardness, Rockwell hardness, and Rockwell superficial hardness of wrought aluminum products. 1.10 Many of the conversion values presented herein were obtained from computer-generated curves of actual test data. Most Rockwell hardness numbers are presented to the nearest 0.1 or 0.5 hardness number to permit accurate reproduction of these curves. Since all converted hardness values must be considered approximate, however, all converted Rockwell hardness numbers shall be rounded to the nearest whole number in accordance with Practice E 29. 1.11 Appendix X1-Appendix X9 contain equations developed from the data in Tables 1-9, respectively, to convert from one hardness scale to another. Since all converted hardness values must be considered approximate, however, all converted hardness numbers shall be rounded in accordance with Practice E 29. 1.12 Conversion of hardness values should be used only when it is impossible to test the material under the conditions specified, and when conversion is made it should be done with discretion and under controlled conditions. Each type of hardness test is subject to certain errors, but if precautions are carefully observed, the reliability of hardness readings made on instruments of the indentation type will be found comparable. Differences in sensitivity within the range of a given hardness scale (for example, Rockwell B) may be greater than between two different scales or types of instruments. The conversion values, whether from the tables or calculated from the equations, are only approximate and may be inaccurate for specific application.