1030 Tube/Pipe

[DBCox]

Hi everyone,

I am working on a weld procedure to weld A-516 Gr70 (P1 G2 ASTM material) to a forged 1030/1035 tube. 1030 and 1035 are not classified, so my procedure must use 1030 or 1035 to qualify it. My problem is I have been unable to find any 1030 or 1035 tube that is large enough. We need a 1-1/2" wall thickness to qualify use for the welded thickness on the end product.

This procedure will also be ABS approved, so it needs to be done on tube/pipe rather than plate. We disagree with this due to the size tube we are welding (28" OD), but would rather qualify with a tube rather than arguing with ABS for weeks over whether or not a plate will qualify a tube that large...

Do any of you have any idea where I can find 1030 or 1035 tube in the 1-1/2" wall range and at least 12" OD?

Thanks!

David Cox

 

[salmon2]

For that size of diameter, usually it is welded pipe, but your wall is also quite heavy for welded pipe. So I think you may have to consider macihine a bar stock or forging.

 

[DBCox]

Thanks for the info. Machining a bar stock would be OK I suppose. Forging is a last resort due to time and cost.

Any idea where I could find the bar stock?

 

[salmon2]

You have to call around to find that chemistry, grade and size. Just remember it is not a516 any more, try a36, that still can give you 70ksi tensile strength.

 

[unclesyd]

Here are two suppliers that I've used in the past for hollow bar. For plain bar I would try Castle Metals.

http://www.amhollow.com/index.php

http://www.scotforge.com/sf_hollows.asp

http://www.amcastle.com/castlemetals/products.aspx#carbon