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Aluminium Alloy FA7911 O

Supplied by Gränges
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Description

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

Chemical composition

Element Weight %
Al
balance
Mn 1.1 — 1.4
Si 0.6 — 0.8
Fe 0.4 — 0.6
Cu 0.4 — 0.6
Ti 0.1 — 0.2
Mg 0.1 — 0.2
Zn 0.0 — 0.05

Properties

Mechanical

Elongation A50 [ A50 ]

18.00 %

Tensile strength [ Rm ]

130.00—170.00 MPa

Yield strength Rp0.2 [ Rp0.2 ]

45.00 MPa

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.

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.

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