"Drawn" vs. "Seamless" Aluminum

[Bflat]

2.5" Diameter .065" Wall Thickness 6061-T6 drawn aluminum tube vs. 6061-T6 seamless aluminum. Seamless is nearly three times the cost at www.onlinemetals.com. Would the cheaper (drawn) be ok for mast (Michael Storer "Viola" sailing canoe)?

[Bflat]

Drawn tube is not as strong as extruded (seamless) tube.

Thanks, mmd. That settles it for me. I'll go with seamless.

[P.I. Stazzer-Newt]

That's a slightly odd comparison, as all the seamless tube I've met was also "Drawn"....



https://www.obcorp.com/-/media/amete...ba-seamwld.pdf

[Bflat]

That's a slightly odd comparison, as all the seamless tube I've met was also "Drawn"....



https://www.obcorp.com/-/media/amete...ba-seamwld.pdf

I wondered about that too, but that's the wording used by the vendor: www.onlinemetals.com.

[alkorn]

Seamless tubing has no weld - a solid bar has been forced over a mandrel to make a hollow tube. That tube is then drawn over other mandrels until the desired dimensions are obtained.

Drawn welded tubing is formed by bending a sheet into a cylinder and then welding the seam. The resulting tube is then drawn over mandrels until the desired dimensions are obtained.

[Bflat]

Seamless tubing has no weld - a solid bar has been forced over a mandrel to make a hollow tube. That tube is then drawn over other mandrels until the desired dimensions are obtained.

Drawn welded tubing is formed by bending a sheet into a cylinder and then welding the seam. The resulting tube is then drawn over mandrels until the desired dimensions are obtained.

Would I be correct to assume that seamless tube would be better for a mast? (Storer Sailing Canoe, "Viola" with lug rig).

[Boatsbgood]

Thank you, Michael!
For taking the time, I learned something before coffee!
Brian