Specifications
| cast steel | HRC：19.8~68.5；HRB：59.6~99.6；HRA：59.1~85.8；HB：80~651；HV：83~976；HS：32.2~115 |
| Forged steel | HB：143~650 |
| Cold rolled steel | HRC：20.4~67.1；HV：80~898 |
| stainless steel | HRB：45.5~101.7；HB：85~655；HV：85~802 |
| Cast iron | HB：93~334 |
| ductile iron | HB：131~387 |
| aluminum alloy | HRB：23.8~84.6；HB：19~164 |
| Brass | HRB：13.5~95.3；HB：40~173 |
| bronze | HB：60~290 |
| Copper alloy | HB：45~315 |
| General Specifications Accuracy | ±6HL at 730~790 HL；±10 HL at 490~570 HL |
| General specification repeatability | 6 HL at 730~790 HL；10 HL at 490~570 HL |
Packing list
Host X1, USB cable X1, hardness testing block X1, cleaning brush X1, support ring X1, transport box X1, user manual X1
After-sales instructions
Warranty days: 365 days
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/36261/Specification.html , which is only used by users who purchase commodities from the NBCHAO.