I've searched the net but can't find the answer: Any idea what grade of steel is in a Macpherson strut rod? I am guessing 1045 by the way it machines and does not oil harden. 1045 is common for hydraulic cylinder rods and such. Anyone know for sure?
1045 will not harden sufficiently to be used as a cutting tool. Higher carbon content straight carbon steels (like 1060) will get hard enough, but tend to be brittle and will lose their hardness if over-heated. That's why we avoid the cheap carbon steel tools. High-speed steels were developed to overcome these deficiencies.OK, I'll try it again. Actually I have since found out that it can be treated as per your instructions but the resulting tool is not very abrasion resistant so doesn't make for a great cutting tool. Think I'll have to lay down some cash for some O-1.