Aluminum Alloy Drill Pipe : Temperature Influence on Mechanical Properties

Temperature Influence on Mechanical Properties

Similar to other metallic materials, the properties of aluminum alloys are dependent upon the temperature to which the alloy is exposed, and the cumulative amount of time exposed to that elevated temperature. Under low temperature conditions, aluminum drill pipe actually gains strength and toughness. At elevated temperatures, a permanent loss of strength can occur, depending on the length of time at the exposure temperature.
 
As a result, extended use of drill pipe at temperatures above 250ºF to 300ºF should be avoided in order to prevent a permanent loss in properties.  However, no failures of aluminum drill pipe resulting from exposure to low or elevated temperatures have been reported.

TemperatureTemperatureTime at Temp% Room Temperature Property at Elevated Temperature% Room Temperature Property at Elevated Temperature% Room Temperature Property at Elevated Temperature% Room Temperature Property after Exposure to Elevated Temperature
FahrenheitCelsius (hr)TensileYieldElong(4D)*Tensile
-320-1960122%122%110%
-112-800105 %106 %100 %
-18-280103 %101 %100 %
2121001087%90%140 %100 %
21210010087 %90 %140 %100 %
21210010,00086 %88 %150 %99 %
3001491075 %77 %160 %92 %
30014910074 %75 %160 %92 %


Reference:
Kaufman, J.G., “Properties of Aluminum Alloys: Tensile, Creep, and Fatigue Data at High and Low Temperatures,” The Aluminum Association, Inc., and ASM International, pg. 29, 1999
 
*Elongation determined over gauge length equal to four times the pipe diameter.

Related Information


Dimensions, Weights and Composition


Overview of Alcoa Aluminum Alloy Drill Pipe Assembly


Overview of Buoyancy & Stretch Properties


Overview of Mechanical Properties


The Strength of Steel at Half the Weight.

Contact Information
Alcoa Oil and Gas
Alcoa Oil & Gas
25025 I-45 North, Suite 575
The Woodlands, TX 77380
United States
1 281 292 6172
1 866 385 2137
Email