ANALYSIS OF MEASUREMENT UNCERTAINTY OF TENSILE TEST FOR MIDDLE BROAD STEEL BAND OF HOT-ROLLING

According to GUM and JJF 1059—1999,calculating and comprising every factor on measurement uncertainty of tensile test for square specimen, the result of the relative measurement uncertainty is Urel(ReL)=1.6%,Urel(Rm)=1.4%,Urel(A)=0.5% respectively. It is shown that the level of measurement uncertainty of tensile test for middling broad strip of hot-rolling is match with Annex J of GB/T 228,which means auctorial tensile test procedures are under control normally.