Material Comparison
Material Comparison
(OP)
Good Day
We currently use 1026 ASTM A513-00 Type 5, 6.25" OD x 3/8" wall DOM Round Tube, Normalized with following specs.
Yield = 48,330 ksi
Ultimate = 71,070 ksi
% Elong in 2" = 33.9
HRB = 75-76
Our supplier is out of stock on this material & wants to substitute material with the following specs.
Material was normalized, but then was heat treated again (unkown process)
Yield = 78,000 ksi
Ultimate = 92,000 ksi
% Elong in 2" = 25
HRB = 92
For our process I'm concerned about the impact of the elevated hardness.
Any Thoughts! Thanks
Neil
We currently use 1026 ASTM A513-00 Type 5, 6.25" OD x 3/8" wall DOM Round Tube, Normalized with following specs.
Yield = 48,330 ksi
Ultimate = 71,070 ksi
% Elong in 2" = 33.9
HRB = 75-76
Our supplier is out of stock on this material & wants to substitute material with the following specs.
Material was normalized, but then was heat treated again (unkown process)
Yield = 78,000 ksi
Ultimate = 92,000 ksi
% Elong in 2" = 25
HRB = 92
For our process I'm concerned about the impact of the elevated hardness.
Any Thoughts! Thanks
Neil





RE: Material Comparison
RE: Material Comparison
If only the impact properties bother you, what about testing both materials and comparing?
Is there a minimum temperature during usage?
Fatigue is not an issue?
I would be concerned by the unknown reheat treatment: was it uniform? no overheat? I think it maybe risky.
Is it feasible and economic to perform a third treatment under a controlled process?
Good luck.
http://www.welding-advisers.com/
RE: Material Comparison
A rubber bushing gets press-fit into the tube (Tube is 6.5" length). The bushing sees a lot of twisting forces.
With this material, we're concerned with the material being to brittle & cracking.
Should have have said "influence" instead of "impact" - not worried about impact qualities.
RE: Material Comparison
What is the highest strength/lowest elongation that you have ever used?
How do the existing tubes fail? Do they break or bend?
Your own history may tell you what you need to know.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Material Comparison