Or chemical analysis method, it is very troublesome, the instrument: one ten-thousandth of the balance, photometer, cuvettes, burets and so on a large number of bottles and jars, and a lot of chemicals. But arbitration are using this method.
Mechanics need
Tensile testing machine ranging from 100,000-1,000,000, and then there is a distance measuring instrument is best
Impact testing machine (2/3,000, right), low-temperature tanks, Sharpi projector (7,000), groove engraving machine
There are not welded seams also need to be a metallurgical inspection: metallurgical microscope (it is recommended to buy more than 200,000), polishing machine, body microscope
It is necessary to do experiments, at least, to do a lot of work, but also a lot of chemicals. p>
Doing experiments at least one qualification is needed, the report needs to be issued second level. Need three aspects: metallographic inspection, mechanical properties, chemical analysis. All need the Ministry of Machinery of the second level of technical grade certificate.