3/16 x 1-1/2 x 36″ 440C Stainless Steel
440C is a 400 series stainless steel, and is the highest carbon content from 400 stainless steel series. It is usually heat treated to reach hardness of 58–59 HRC. It is a bearing steel, and used in rolling contact stainless bearings, e.g. ball and roller bearings. it is also used to make knife blades.