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A strong material with good sag resistance. This alloy is suited for controlled atmosphere brazing.
Elongation A50 A50
0.5 % at 20 °C
Tensile strength Rm
180 - 220 MPa at 20 °C
Yield strength Rp0.2 Rp0.2
160 MPa at 20 °C
Melting point Tm
635 - 655 °C
Thermal conductivity λ
160 W/(m·K) at 20 °C
After brazing, calculated from electric resistivity data measured at room temperature
1.4 - 1.8 %
1.3 - 1.7 %
0.65 - 1 %
0.05 - 0.2 %
Corrosion potential (ASTM G69) measured on brazed unclad fin material -800 mV vs SCE
Standard process capabilities: width 10-1400mm; thickness 0.050-3.18mm
The FA68XX alloy family is a reliable and thoroughly evaluated fin alloy family that is characterised by a high post braze strength, and a good sagging resistance during brazing. The alloy is designed to form large grains during brazing, which is beneficial for the sagging behaviour and hinders braze metal penetration into the core. The high manganese and silicon content contribute to a higher strength after brazing. The corrosion resistance of the fin alloys is good, with a low self corrosion rate. FA68xx is available in four different zinc levels to allow for a tailored cathodic protection of tubes and fillets.
This material data has been provided by Gränges.