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Subject: Re: What Mech Prop do we obtain when we do the COld draw process?

Date: 07/10/01 at 3:31 PM
Posted by: Bill Pearson
E-mail: wjpearson@ponyexpress.net
Message Posted:

In Reply to: What Mech Prop do we obtain when we do the COld draw process? posted by Shahab Hussain on 07/10/01 at 10:51 AM:

You don't specify the size of the OD or shape or the wall thickness or the tolerance in your posting. The best tubing choice is based on these criteria. If the application has a relatively thin wall 1/8 to 9/16 wall and is round and 70 ksi and fairly tight tolerances a DOM product (ASTM A513) is the choice. If tolerances are not a problem and thin wall is acceptable and electric resistance welded ERW product is the choice. 50 ksi is available commercially however if the quantity needed is substantial 80 ksi can be produced both in round and shapes. Minimum runs of 60 to 120 tons of material will be the norm and tooling costs will occur on special sizes. Seamless materials have terrible tolerances on wall thickness and cold drawing this material does not substantially improve strength. If the application requires high strength on heavy walled tubing post heat treatment will probably be required depending on the strenght required. Producing the part out of solid material is also a choice depending on the length of the part and the hole size.

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