Brinell hardness of carbon steel pipe

Brinell hardness(HB) with a certain diameter of the steel balls or tungsten carbide balls, pressed into the pattern surface of a predetermined test force (F), after the predetermined hold time after drop test force, the diameter of the measurement sample surface indentation (L).

Brinell hardness测试力除以压痕球面区域配电。HBS（球球球）单位N / MM2（MPA）。该公式是：其中：F - 压入样品测试力的金属表面，n;D - 试验钢球直径，mm;D - 压痕平均直径mm。

Brinell hardness测量更准确可靠，但通常HBS仅适用于更硬的钢或薄板Na的金属材料的450n / mm2（MPa）或更小。钢材标准，Brinell hardness是最广泛使用的，并且经常说材料的硬度，压痕直径d都直观和方便。

Brinell hardnessis the most widely used methods in carbon steel pipe hardness testing . This method uses the earliest, due to its imprint, and thus the hardness values affected by the sample organization microsegregation ingredients uneven minimal impact, test results points sprinkle a small degree, good reproducibility, can objectively reflect the objective hardness of the material.

原则：在预定的检测力中，将钢球的一定直径压入样品表面以保持一定时间，然后除去检测力，可以基于直径计算样品表面上的压力压痕直径测量。压力压力压力标志着凹版区域。

Brinell hardness测试力除以压痕球面区域配电。单元9.807N / mm。压痕大钢球压入深度，低硬度值;反之亦然是聘用的硬度值。