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近来,市场上出现了一种取而代之的新牌号——St12。我们使用St12普通冷卷材后发现,产品性能一致性不好,质量不稳定,时好时坏。为此,我们查阅了St12牌号的《供货材质单》。发现St12牌号冶炼炉包号机械性能一栏中的屈服强度值误差极大,从177~280MPa/c之间,波动值超出了中国国家标准《钢铁产品牌号表示方法》普通低碳钢中的所有规定,一种St12牌号涵盖了中国普通低碳钢Q195~Q275五大类十余种机械性能的数值。认为St12牌号是很不科学的钢铁表示方法,从概念上混肴了普通碳素钢材正常的商贸与生产秩序,很容易给终端用户造成原材料选购模糊概念。
Recently, a new brand name, St12, has appeared on the market. We use St12 ordinary cold coil and found that product consistency is not good, unstable quality, good times and bad. To do this, we consulted the “St12” St12 material supply list. Found that St12 grade smelting furnace bag mechanical properties of a column of yield strength error is extremely large, from 177 ~ 280MPa / c, the value of fluctuation beyond the Chinese national standard “steel product brand representation” of all ordinary low carbon steel Stipulates that a St12 brand covers the value of more than ten kinds of mechanical properties of the five major categories of China’s general mild steel Q195 ~ Q275. Think St12 brand is a very unscientific method of steel representation, conceptually mixed ordinary carbon steel normal business and production order, it is easy to cause end-users to buy the fuzzy concept of raw materials.