Hardness Converter Online (HRC / HB / HV for Fasteners)

Hardness Converter (HRC / HB / HV for Fasteners)

Fastener inspection constantly crosses hardness scales: drawings specify Vickers HV, test reports give Rockwell HRC, supplier catalogs list Brinell HB. This online calculator converts any one of them to the others plus the approximate tensile strength (steel, per GB/T 1172 practice).

Keep in mind hardness conversion is an approximate correlation, sensitive to material composition - it applies to carbon and alloy steels, not stainless or brass. Acceptance decisions must rely on actual measurements per GB/T 230.1 / 231.1 / 4340.1 and the official conversion tables; this tool is for quick daily cross-checking.

For hardened bolts, Vickers hardness is specified at half-radius of the thread cross-section, and decarburization checks are also required for grades 8.8 and above. Pair with our capacity calculator and selection tool. Zhuhai Jiali Hardware supplies precision screws with hardness and material certificates - contact us.