I am making a few prototype parts to validate a new test method on our brazed tubing, and have run into a problem.
Our tubing is made from low-carbon steel with a 2-4micron copper plate, and run through a brazing operation and stress relief process, resulting in a hardness of ~55 on the 30T scale.
I need to create holes in a series of sample tubes; hole diameters (ideally) would be .005, .010, .015 and .020". Holes are to go through one wall only.
I had thought of laser-cutting as the ideal method for this, but everyone that I have contacted has said no. So, my appeal is out to the Cove membership; does anyone know of a (relatively) inexpensive method to create these holes? This will be a one-time deal, with probably a total of 30 tubes maximum being made.
Any assistance or advise is gratefully received.