//forum.spyderco.com/viewtopic.php?t=70973Evil D wrote:The 52100 Military came as a bit of a surprise and seemed to be a hit with most people. I think many of us loved that steel, but for me it seems I need something a little more corrosion resistant for EDC. Given that the two steels are often regarded as having similar qualities apart from corrosion resistant, it seems like a steel that I would really enjoy.
sal wrote:Anybody got a chemistry handy?
Ha, beat me by *thismuch*Stuart Ackerman wrote:Chemistry, Sal?
https://www.alphaknifesupply.com/zdata- ... S-AEBL.htm
C Si Mn max P max S Cr
0.68 0.4 0.65 0.025 0.015 12.8
Few know what AEB-L steel is, and those that do, only have heard that it is similar to 440B or 440A. The only similarities between AEB-L and 440B or 440A is the amount of carbon. The fact that AEB-L has only 12.8% chromium by weight compared to the 16-17% in 440A and 440B makes the steels quite different. AEB-L is more similar to a stainless 52100 than 440A. A copy of AEB-L called 13C26 is made by Sandvik.
AEB-L naturally forms what is called the K2 carbide, the harder of the two chromium carbides, compared to the K1 carbide, which is formed in steels such as 440C. The K2 carbide is about 79 on the Rockwell C scale, compared to 72 for the K1 carbide. Through proper heat treatment, AEB-L has fine, evenly distributed K2 carbides. AEB-L lies almost perfectly on what is called the "Carbon Saturation Line", which means that all of the carbides formed are precipitated carbides, not primary carbides like are formed in 440C, and there is more carbon and a similar amount chromium in solution as compared to 440C. Primary carbides are very large. So, through a balanced composition, AEB-L has excellent toughness, edge retention, workability, ease of sharpening, and ease of polishing.