Aluminium Alloys - Tritech Group

1 Good mechanical properties . Excellent foundrycharacteristics ensure a high degree mechanical properties up to 350 foundry alloy, requires special mechanical properties up to 200 alloy. Difficult foundry alloy suitable for simple shapes only. Material fullyage hardens to optimum properties after 21 daysat room tensile strength. Good mechanical properties used in criticalaerospace general purpose high strength casting properties , good corrosionresistance, good pressure-tight properties . Heattreatment variations provide a wide range ofmechanical properties to cover most Aluminium .

2 High conductivity. Good colouranodising. Can be corrosion resistance, accepts a high widely used. It has high strength and goodcorrosion purity 356 for Aerospace use. See BS L99 mechanical properties . AlloysSpecificationCu Mg Si Fe Mn Ni Zn Pb Sn TiOthersBS L99 TFBS L119 L51 TEDTD 5008 MBS L78 TFBS L169

3 TFBS 1490 LM25 MTETB7 TFBS 1490 LM0 MBS 1490 LM5 M356 T51T6A356 T6A357 T6 MechanicalPropertiesCond-itionUTS ElongN/mm2N/mm2%min min min230 185 2215 190 1160 125 2215 170* 4250 220 300 240 80* 2150 120* 1160 80* 185* 140 90* 3158 206 137 3220 151 3280 210 3 Chemical Composition, %ComparableSpecificationsA356 (USA)A-S7G03 (FRANCE)G-AlSi7Mg(Germany)Al-Si7Mg( )MSRR8009/RR350 (UK)MSRR8041/RR50 (UK)A-S2U (France)

4 4OE (USA)Al-Zn5Mg( )A-Z5G (France)G-AlSi5 Cul(germany)3600 (Italy)355 (USA)A357 (USA)EN 3125A-57G06 (France)356 (USA)A-S7G (France)G-AlSi7Mg(germany)Al-Si7Mg( )A5 (France)BS 1490 LM25 (UK)BS L99 (UK)ABM 5-5049 (UK)S-07-1306 (UK)L169 (UK)Characteristicsand usesHEAT TREATMENT CONDITIONM = As cast TE = Precipitation treated only = T51 (USA) TB7 = Solution treated and stabilised TF = Solution treated and precipitation treated = T6 (USA)Closer tolerances are generally attainable by utilising additional operations.

5 NON-FUNCTIONAL DIMENSIONS Where design permits, the above tolerances should be increased by 50%.Analysis requirements are maximum unless otherwise stated.* Proof stress where indicated thus is for information only and is not a specification ( ) tolerancesfunctional dimensionsinchesWALL THICKNESS TOLERANCES pecial tolerance apply to wall thicknesses. The normal tolerance to be allowed is .008 ( ). Large plan wall sections, above 75 (500 sq. cm.), should incorporate a tolerance of " ( ).STRAIGHTNESS/FLATNESS TOLERANCE " ( ) per inch (per 25mm), excluding localised wax pattern TOLERANCE 1/2 SURFACE FINISHT ypical surface finish 80/100 microinches ( micrometres).

6 A finer surface finish is generally attainable when specially TOLERANCESAre dependent on the casting configuration and/or alloy specification, and would be discussed on an individual basis at the quotation tolerance dimension tolerancegeneralup to .004" up to + to .006" + to + to .008" + to + to .010" + to + to .012" + to + to.

7 015" + to + to .018" + to + to .021" + to + to .024" + to + to .027" + to + to .030" + to additional inch add .001"each additional 25mm add .025mm