Alloy 6040

Technical Data - ALLOY 6040 Call 1-800-USE-2011
Chemical Composition Limits Others1
Weight % Si Fe Cu Mn Mg Cr Zn Ti Each Total
Minimum 0.40 - 0.20 - 0.8 - - - - -
Maximum 0.8 0.7 0.8 0.15 1.2 0.15  0.25 0.15 0.05 0.15

1 Also contains 0.30 - 1.2 wt. % each of Sn and 0.15 - 0.7 % Bi.
Comparative Characteristics
Temper Corrosion Resistance
Cold
Workability3
Machin-
ability3
Anodize
Response3
Braze-
ability4
Weldability4
General1 Stress2 Gas Arc Spot
T6, T651 B A C B A - - - -
T8 B A D B A - - - -
T9 B A D B A - - - -
1 Ratings A through E are relative ratings in decreasing order of merit, based on exposures to sodium chloride solution by intermittent spraying or immersion. Alloys with A and B ratings can be used in industrial and seacoast atmospheres without protection. Alloys with C, D and E ratings generally should be protected at least on faying surfaces.
2 Stress-corrosion cracking ratings are based on service experience and laboratory tests of specimens exposed to the 3.5% sodium chloride alternate immersion test.
A= No known instance of failure in service or in laboratory tests.
B= No known instance of failure in service; limited failures in laboratory tests of short transverse specimens.
C= Service failures with sustained tension stress acting in short transverse direction relative to grain structure; limited failures in laboratory tests of long transverse specimens.
D= Limited service failures with sustained longitudinal or long transverse

3 Ratings A through D for Workability (cold), A through E for Machinability and A through C for Anodize Response, are relative ratings in decreasing order of merit.
4 Ratings A through D for Weldability and Brazeability are relative ratings defined as follows:
A= Generally weldable by all commercial procedures and methods.
B= Weldable with special techniques or for specific applications that justify preliminary trails or testing to develop welding procedure and weld performance.
C= Limited weldability because of crack sensitivity or loss in resistance to corrosion and mechanical properties.
D= No commonly used welding methods have been developed.
Typical Mechanical Properties
  Tensile (.500" Dia. Specimen) Hardness Shear Fatigue*
Temper Yield Ultimate Elongation/4D Rockwell "B" 100kg 1/16" Ball Ultimate Shearing Strength Endurance Limit - R.R. Moore Type
KSI MPa KSI MPa %   KSI MPa KSI MPa
T6,T651 43.0 296 47.0 324 15 - - - - -
T8 44.0 303 47.0 324 14 62 30 207 - -
T9 50.0 345 53.0 365 10 - - - - -

*5x10E4 cycles of reversed stress

 
 
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