Aluminum for gas tank

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Which aluminum is preferred for a gas tank. I have made some tanks from 6061 but I understand 5052 is a little easier to work with.
Reply:Depends on tank size and design. Certainly can't just rely on one of the higher strength alloys to make a strong tank that's resistant to fatigue, design is far more important than alloy choice imo- strength through geometry. The harder alloys are typically more brittle and less formable. I often use half hard (H14) 1050 or 3103 (1100 and 3003 in the US i believe) for tanks with lots of shape in them, 5251 (similar to 5052 but more available in the UK) for larger/simpler shaped tanks, or when open to the elements
Reply:Hello gow589, in my part of the country 5052 is likely the alloy of choice for most fuel tank considerations. I say this since the majority of tanks that I have built or seen built have been for use on or in boats and it is much better suited to forming processes, it also tends to resist corrosion better in most applications. Hotrodder mentioned engineering, that is certainly a very big consideration for any fuel tank. Tank shape, size, baffle type, wall thickness, method of mounting, welding process, will all have a big impact on the life and integrity of the tank, so keep all of these in mind as you decide on a design. Just a bit more for your consideration. Best regards, Allanaevald
Reply:Great responses; they about sum it up.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.