T3 डिज़ाइनर हीट ट्रीटेड है फिर कोल्ड वर्क्ड. पदनाम उन उत्पादों पर भी लागू होता है जो अपनी ताकत में सुधार के प्राथमिक उद्देश्य के लिए ठंडे काम करते हैं यानी. 2024-टी36 . यह उन उत्पादों पर भी लागू होता है जिनमें फ़्लैटनिंग या स्ट्रेटनिंग को लागू विनिर्देशों में मान्यता प्राप्त है जैसे कि फ़्लैट शीट जिसे 2024-T3 नामित किया गया है.
The T4 designator is solution heat treated and naturally aged to a substantially stable condition. This designation applies when the product is NOT cold worked after heat treatment. The designation also applies when applicable specifications do not recognize the effects of cold work in flattening and straightening operations. The T4 designator applies when the product is heat treated by the customer.
Typical mechanical properties for 2024 : 2024-0 परम 26,000 psi yield 11,000 साई . 2024 T3 ultimate 65,000 psi yield 45,000psi. 2024 T4 ultimate 64,000 psi yield 42,000psi.
So it would appear that if you can use 2024 T3 aluminum sheet you may not have to heat treat.
I’m confused by the idea of starting with T3 and ending up with T42 … I consider them equivalent tempers.
any shape you can form in T42, you should be able to form in T3. If the drawing states T42 material, T3 should ab an acceptable substitute (so long as you can form it).
If the shape cannot be formed in T3; then HT to O, form, and HT to T42.
If the drawing states T42; then it is expecting that you’ll buy T3 (or other), HT to O, form, HT to T42.
When I said ,If, you can use 2024-T3 I meant using the material as is with no forming, or very gentle forming as you would on a wing skin or flat part.
If you do have to do extreme forming, then heat treat and quench would be required then form and re- age to T4.