不锈钢的简易分类
Simple classification of stainless steel
不锈钢可以粗浅的分为200系列，300系列和400系列三大类，其中300系列是最常用的，200系列和400系列一定程上是300系列的替代白钢雕塑 小型滚揉机 防火电缆 托辊设备 水刀切割机  铜钟 石雕狮子  校园不锈钢雕塑 扭王块模具品，而严格来讲400系列不叫不锈钢，叫不锈铁，因为里面不含镍元素，所以用磁铁可以吸引住。而200系列和300系列是有镍的，所以是没有磁性的，吸铁吸不住。
Stainless steel can be roughly divided into three categories: 200 series, 300 series and 400 series. Among them, 300 series is the most commonly used one. 200 series and 400 series are substitutes of 300 series. Strictly speaking, 400 series is not called stainless steel, but stainless iron. Because it does not contain nickel, it can be attracted by magnets. The 200 series and 300 series have nickel, so they are not magnetic, and can not absorb iron.
304是300系列中最常见的品种，所以一般从304的价格变化可以判断出整个不锈钢的价格走势。200系列含镍少，400系列不含镍，300系列含镍最多，所以受镍价影响最大的是300系列。
304 is the most common variety in 300 series, so the price trend of the whole stainless steel can be judged from the price change of 304. The 200 series contains less nickel, the 400 series does not contain nickel, and the 300 series contains the most nickel, so the 300 series is most affected by the nickel price.