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Material Supplied by

Gränges

Aluminium Alloy FA7911 O

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Description

A high strength, heat-treatable intermediate Mg material for header and plate applications suited for controlled atmosphere brazing.

Properties

Mechanical

Elongation A50 A50

18 % at 20 °C

Tensile strength Rm

130 - 170 MPa at 20 °C

Yield strength Rp0.2 Rp0.2

45 MPa at 20 °C

Chemical properties

Element

Weight %

Comment

Al

-

balance

Mn

1.1 - 1.4 %

Si

0.6 - 0.8 %

Fe

0.4 - 0.6 %

Cu

0.4 - 0.6 %

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Technological properties

Corrosion properties

Corrosion potential after brazing -690 mV vs SCE

Dimension

Standard process capabilities: width 10-1400mm; thickness 0.050-3.18mm

Other

With a combination of good formability and high post braze strength, FA7911 is highly suitable for the use in headers and plates. The defined composition of silicon and magnesium makes FA7911 easy to braze in the CAB process, while showing good ageing behaviour after brazing. The addition of titanium to the product also enables a very good corrosion protection. In typical header and plate dimensions it easily exceeds 60 days of SWAAT life without perforations. FA7911 exhibits excellent corrosion performance with lateral corrosion behavior in SWAAT (ASTM G85). The corrosion attack is proceeding horizontally and prolonging the time to perforation. The addition of titanium improves the corrosion behavior of the bulk material by hindering pitting corrosion.

Processing history

Temper: O

This material data has been provided by Gränges.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.