不锈钢的简易分类 A 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 divided into 200 superficial series, 300 series and 400 series three categories, 300 series is the most commonly used among them, 200 series and 400 series on certain range is 300 series of alternatives, but strictly speaking 400 series not stainless steel, stainless iron, because it does not contain nickel element, so use the magnet can hold. And the 200 series and 300 series have nickel, so there is no magnetism. 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 the 300 series, so the price movement of the entire stainless steel can be determined from the price change of 304. The 200 series contain no nickel, 400 series contain no nickel, 300 series have the most nickel, so the most affected by nickel price is 300 series. 300系列可以简分为304、304L、316、316L、321、309S、310S等等，区分的依据是各种金属元素的含量不同，含量不同的不锈钢的特性也不相同，304和304L的区别在于碳（C）含量的不同，带L的是表示含碳低，也叫低碳，316和316L的区别也是一样。 300 series can be divided into 304 jan, 304, 316, 316 L, 316 L, 309 s and 310 s, and so on, to distinguish is all sorts of different content of metal elements, based on the characteristics of the different content of stainless steel is not the same, the difference between 304 and 304 L different content of carbon (C), with L said carbon is low, also known as low carbon, the difference between 316 and 316 L as well.