Hardness test of tinplate
In the past, the hardness test of tinplate mostly used the desktop surface Rockwell hardness tester, and the ordinary steel flat test anvil was used to test the HR30T hardness.
Over the years, since the national standard GB/T2520-2000 for tinplate has adopted the internationally accepted HR30Tm hardness representation method, diamond anvils have been used in China to test the HR30Tm hardness value of tinplate.
However, testing the hardness of HR30Tm requires a diamond anvil, and the domestic Rockwell hardness tester rarely has such accessories to buy. Because suitable diamond anvils are difficult to buy, desktop surface hardness testers are more expensive. Therefore, the application of the HR30Tm hardness representation method in the domestic tinplate industry is not universal. Especially in terms of tinplate manufacturers, although people always realize that the hardness of tinplate is very important, it is related to the quality of processed products, production efficiency and corporate benefits. However, most companies have not re-examined the hardness of the purchased tinplate.