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I am having some parts cut by a local laser cutter and would like to clean up the burn around the edges on the bottom of the parts. The parts are used in a consumer product so the appearances kind of matter. The material is 0.020" 1/2 hard 301 stainless which has been a challenge to cut mostly...

I had some analysis done and the rulers are either 410 or 420 and have hardness of 28.8 to 32.1 Rockwell and a tensile strength of 137,000 to 150,000 psi. Not precise numbers but good enough for me. The strength numbers are equivalent to 1/2 hardened 301 which is what I'm going to use. Thanks...

I did a little experiment with a piece of 0.020" ruler and a piece of the 0.024" 301 1/4 hard. They were the same length and roughly the same width and clamped identically to a block. I then bent the free ends down an equal distance, released and measured the permanent deformation. The ruler was...

I miss typed in my last post. I purchased 0.024" 1/4 hard 301 from McMaster. They have 0.020" but only in fully hardened rolled strip which doesn't really work for me. The problem isn't ultimate strength but the tensile strength, really more the "springyness" of it. The 1/4 hard doesn't seems...

Ed - Thanks for doing the PMI on your ruler, that info is super helpful. I ordered some 0.24" 1/4 hardened 301 from McMaster on Thursday, hopefully I'll be able to determine if it will be an appropriate material even though I want to use 0.020".

They are reasonable magnetic, so that means it's not 301?

I was looking around for places to get small samples pieces of 301 and looking at McMaster (http://www.mcmaster.com/#type-301-stainless-steel-bars/=hvhbss) I noticed they listed strength and Rockwell hardness for the various states. While it may not be the best method to determine exact...

It's been a long time since I've had to deal with a tensile testing machine. The set up, as I recall, would be pretty simple though. Just clamp the sample in the upper and lower jaws(?) of the machine, look at the readout to find the elastic and ultimate strengths and then divide those by the...

Thanks for the thoughts. I am not as much worried about strength as I am springy-ness, so I suppose I am worried about the yield strength. I had some cut out of annealed 304 and they were like limp noodles, totally useless. I'll try to find somewhere that will send me small pieces at a...

I am a mechanical engineer and entrepreneur working on a new product. I've used stainless steel rulers (with the cork backing removed) that are 0.020" thick for my prototypes and need to figure out what grade and state the stainless used in these rulers are so that I can order material for...