Uncertainty Evaluation on Microscopic Vickers Hardness Test Results of a Copper Pipe

According to the metallic materials Vickers hardness test standard GB/T 4340.1-2009,the microscopic Vickers hardness test was done to a copper pipe,and the uncertainty for the microscopic Vickers hardness test results was evaluated.The results show that the microscopic Vickers hardness test results for the copper pipe was(86.5±2.8) HV0.1,k=2 under the confidence probability was 95%.