Is there an easy (cheap) way to identify aluminium alloy plate - Printable Version +- ask aluminium Forum (https://www.askaluminium.com) +-- Forum: My Category (https://www.askaluminium.com/Forum-My-Category) +--- Forum: aluminium faq (https://www.askaluminium.com/Forum-aluminium-faq) +--- Thread: Is there an easy (cheap) way to identify aluminium alloy plate (/Thread-Is-there-an-easy-cheap-way-to-identify-aluminium-alloy-plate)

Is there an easy (cheap) way to identify aluminium alloy plate - ZellaHyday - 07-17-2018 How to identify the quality of aluminum alloy plate Is there an easy (cheap) way to identify aluminium alloys Usually judge alloy aluminum plate quality time must pay attention to the appearance of brightness, survey bat bao hou is even even, pinch the board with the hand, feeling the elasticity and patience isn’t is good. Its main function is to make the moisture in the hot air on the heat exchange sheet coagulate into water droplets easily spread and flow down the aluminium sheet. Do you really understand the aluminum sheet?   So to avoid for heat exchange area between the water affect the ventilation effect of heat exchanger, a “bridge” and then air conditioning heat exchange rate, under the condition of equal refrigerating capacity will also be able to save power. Now, the usual hydrophilic aluminum foil on the market has good hydrophilicity in addition to its appearance, while the condensate remains between the heat exchanger. The difference is that the hydrophobic aluminum foil is intended to remove the condensate between the heat exchanger by increasing the contact Angle between the condensate and the heat exchanger, so that the condensate can form water drops that are prone to slip. RE: Is there an easy (cheap) way to identify aluminium alloy plate - ircasodle - 07-17-2018 All aluminum mechanically hardens. If it is common pipe, tubing or extrusion, there are certain probabilities as to what it is. If you have pipe and you cannot bend it, it is usually 60-61 T6 But could be 6063-T6 If you have pipe and you can bend it is usually 60-63 T-42 or T52 Today common extrusions are 60-63 T-52 60-61 T-6 Both weld well with 40-43 the most common filler wire. Today 5086 what they call marine grade aluminum is very popular. But marine aluminum comes and goes in and out of favor, as the engineers find out in the real world that aluminum is probably not the material for salt water. Years ago 20-24 was marine aluminum. Now it is 5086. Before that it was 60-61 All aluminum age hardens, so you have to watch out, a T-3 or T52 hardness today might be something else five years down the road or less. So although you get away with bending it new, it will not bend old. 70-75 tooling plate of old goes as hard as T-8, it will actually stand up to brass. Today though it is more standard to find, T-7 readily available. The other problem is that 60-61-0 material, can be heat treated, and hardened by local shops. So you never know for sure. 20-24 is a pain in the butt. Because it does not weld right with 40-43 filler, it is like a disease if it is not marked well after you cutup the sheet. Not really anyway I know of for sure to tell the difference. For anything important we buy fresh material, and fresh welding rod. Plus we limit or isolate strange materials in the shop. Under products you might see what is common right now, and back probably about 20 years. RE: Is there an easy (cheap) way to identify aluminium alloy plate - aluminiumsheet - 07-17-2018 I had some projects that I wanted to make from used aluminum, but am quickly learning that not all aluminum is the same.   I'll probably take William's advice that any parts that are extremely critical, and difficult to monitor should be made from new or otherwise "known" aluminum alloys. Any lab equipment that is 10+ years old will show up on E-Bay and government auctions for pennies on the dollar.  But, may be broken, with limited manufacturer's support, and etc.   I see there is about a 50 year old flame photometer on E-Bay now.  Perhaps I would have a chance of getting it working and it would be good to practice with. For a qualitative analysis, perhaps I should just try burning some shavings with my torch and see what happens.