Procurement of steel needs to have a pair of "fire eyes", in order to quickly have a good distinction between the quality of steel. In fact, as long as master "six see a listen", you can also distinguish is good or bad!
1, look at the appearance, look at the size and appearance color, specifications neat, size specification, according to the properties of steel, generally good steel, no impurities on the surface, color unity.
2, see the hardness, the hardness of steel is not the same, according to the hardness properties of steel, to determine, is not their own steel, there is no difference in quality.
3, look at the size, poor quality steel, uneven, different sizes, size fluctuations, with micrometer or tape measure to measure, look at the size fluctuation.
4, look at the elasticity, steel toughness and elastic limit is different, poor quality steel surface will have cracks, poor elasticity.
5, look at the steel nameplate, a good steel plant, nameplate specification, clear expression, parameter data can be relied on.
6, look at the steel quality report, is not standardized, with the properties of steel, and their requirements corresponding.
7, listen, experienced, can be identified according to the steel business, good steel, clear voice, no noise.
