E.A. Berg chisels dull extremely quickly - what am I doing wrong?

[Jim Koepke]

I kindly ask you to elaborate on how to perform such a test :-)

I suspect that you mean that the chisel should be hardened in such a way that it takes some effort to file away material from the chisel, but I'd like some details on what result I should expect in either a good or bad scenario.

A file will easily cut through soft steel, it should pretty much just slide or roll over hard steel.

As I wrote earlier I've tried two different 10mm chisels albeit both E.A. Bergs.

I have other chisels, but would it matter if the width is not the same?
I assume a chisel of smaller width would not see the same pressure on the edge, but I could be wrong?

A smaller chisel being pressed or hit just as hard will have a smaller area to disperse the pressure at the edge. A small chisel would likely deform quicker than a large chisel unless my understanding of physics is flawed.

jtk