I recently moved my shop into a building that formerly housed a machine shop and marine fabricator. The previous owner left some really nice stock that I've been tempted to try and use. It appears to be thick wall (sched 80?) stainless pipe. 1". It's the kind of material used to fabricate rails, ladders and towers on saltwater boats. It seems pretty tough. Questions: can it be welded? (what kind of wire and gas) where can I find tensile strength and other specifications for this and similar materials? What would be a way to test this stock to be sure of it's properties before I use it for something critical or where safety may be a concern? I found some records of the previous business and am searching them for material invoices in hopes of identifying this stock. I hate tossing anything that I could use in the future!