Tensile strength of steel tubing

Don't know too much about the subject, but I came up with a web search which led me to this page:
Page 1

One of the tabs led to a design pdf that seems to have that kind of information:
Design Tables and Info pdf

Sec 7-5 on Page 155 seems to have a chart with axial tension for those sizes. I have no idea if that is the spec you are looking for, but the pdf is chock full of information. It's an Australian company, but I wonder if the tubing specs are not international. I'm sure you can figure that out.

Good luck!

@Blickers
Thanks mate, That looks like the one! I found a similar page earlier on but that one looks like what I was after. much appreciated

Glad I could be of help. Best of luck on your design project.