Principal Design Features
This is a high strength structural alloy. It is not heat treatable.
Commonly used in the manufacture of unfired, welded pressure vessels, marine, auto aircraft cryogenics, drilling rigs, tanks, TV towers, transportation equipment, and in missile components.
Machinability in the strain hardened tempers (H34, H36, H38) is relatively good. In the annealed (O temper) machining is difficult, but still can be accomplished. Use of lubricants is advised.
Forming characteristics are best with the alloy in the O temper — less good in the H36 or H38 tempers.
This alloy is readily weldable by conventional methods. Use of electric arc welding in particular produces excellent results.
The alloy is non-heat treatable.
No specific data as to hot working range. However the alloy is forgeable.
No data in regard to hot forming. Cold forming characteristics are excellent and usually would not necessitate hot working.
Excellent cold working characteristics in the O temper and somewhat less good in H36 and H38 tempers.
Anneal at 650 F for long enough to insure thorough heating. Air cool.
Not applicable to this alloy.
Hardens by cold working only.
Other Physical Properties
Electrical conductivity 30% of copper.
Other Mechanical Properties
Shear strength for O temper is 23 ksi, for H34 it is 27 ksi
Specific Gravity: 2.66
Melting Point: 1090
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