No one is saying that. But to say it had no chromium in it is a misnomer. It had chromium in it. 4130 is 4130. Even 4340 is not 4130. I should have said it was a manganese alloy, but I was trying to point out (badly) that all the different tubing alloys are close recipes compared to hi-ten steel.

As a c ticket welder I should have been clearer.