How to judge the quality of thread steel?
Use material tester to measure data, then compare with national standard data.
Sampling sample. Do tensile, bending, and impact tests.
Appearance check the necking fracture, peeling, oil pollution, damage, deformation, diameter error, third is the best for the test, according to the provisions of the current "reinforced concrete hot-rolled ribbed bar" GB1499 current national sample sent to the laboratory test, the sample collected for tests of mechanical properties, such as more than three are qualified, steel is good the!
First of all, to see if there are rebar factory quality certificate and inspection report
