Originally Posted by
rydabent
Of note someone mentioned tube materials say before 85. Remember that there were Reynolds and Columbus tubes that were state of the art that were as good as or better than we have today.
Those older tubesets were good in the sense that they were light, had thin walls, etc, but not so good for welding because of the extreme heat. The air hardened steels I mentioned above (853 and 631) are good examples of newer steel alloys that aren't affected much by the high heat of welding, i.e. the HAZ isn't really an issue with these thin walled, lightweight tubesets. The marketing info says these air hardened steels are actually made stronger in the HAZ than the rest of the tube, FWIW.