7075铝板属Al-Zn-Mg-Cu系超硬铝，20世纪40年代末期就已应用于飞机制造业，至今仍在航空工业上得到广泛应用的超高强度变形铝合金。其特点是，固溶处理后塑性好，热处理强化效果特别好，在150℃以下有高的强度，并且有特别好的低温强度；焊接性能差；有应力腐蚀开裂倾向；需经包铝或其他保护处理使用。双级时效可提高合金抗应力腐蚀开裂的能力。在退火和刚淬火状态下的塑性稍低于同样状态的2A12.稍优于7A04，板材的静疲劳.缺口敏感，应力腐蚀性能优于7A04，此合金具有良好的机械性能及阳极反应，是典型的航空航天军工专用铝合金材料。
主要用于航空航天,模具加工,机械设备.工装夹具,特别用于飞机制造结构及其它要求强度高,抗腐蚀性能强的高应力结构体.
| 化学元素 | |||||||||||||||||||||||||
| 元素 | Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Ti | V | Zr | 其它 | Al | ||||||||||||
| 单个 | 合计 | ||||||||||||||||||||||||
| 含量 | 0.40 | 0.50 | 1.2~2.0 | 0.30 | 2.1~2.9 | 0.18~0.28 | - | 5.1~6.1 | 0.20 | - | - | 0.05 | 0.15 | 余量 | |||||||||||
| 机械性能 | ||||||||||||
| 合金状态 | AMS-QQ-A-250/12 | AMS 4045 | ||||||||||
| 厚度/inch | 抗拉强度/KSI | 屈服强度/KSI | 断后延伸率/% | 厚度/mm | 抗拉强度/Mpa | 屈服强度/Mpa | 断后延伸率/% | |||||
| A50mm | A | A50mm | A | |||||||||
| 7075-T6 | 0.008≤T≤0.011 | ≥74 | ≥63 | 5 | - | 0.20＜T≤0.28 | ≥510 | ≥434 | 5 | - | ||
| 0.0012≤T≤0.039 | ≥76 | ≥67 | 7 | - | 0.28＜T≤0.99 | ≥524 | ≥462 | 8 | - | |||
| 0.040≤T≤0.125 | ≥78 | ≥68 | 8 | - | 0.99＜T≤3.18 | ≥538 | ≥469 | 9 | - | |||
| 0.126≤T≤0.249 | ≥78 | ≥69 | 8 | - | 3.18＜T≤4.75 | ≥545 | ≥476 | 9 | - | |||
| - | - | - | - | - | 4.75＜T≤6.32 | ≥552 | ≥476 | 9 | - | |||
| - | - | - | - | - | 6.32＜T≤12.67 | ≥538 | ≥462 | 9 | - | |||
| - | - | - | - | - | 12.67＜T≤25.4 | ≥538 | ≥469 | 7 | - | |||
| - | - | - | - | - | 25.4＜T≤50.8 | ≥531 | ≥462 | 6 | - | |||
| - | - | - | - | - | 50.8＜T≤63.5 | ≥524 | ≥441 | 5 | - | |||
| - | - | - | - | - | 63.5＜T≤76.2 | ≥496 | ≥421 | 5 | - | |||
| - | - | - | - | - | 76.2＜T≤88.9 | ≥490 | ≥400 | 5 | - | |||
| - | - | - | - | - | 88.9＜T≤101.6 | ≥462 | ≥372 | 3 | - | |||
| - | - | - | - | - | - | - | - | - | - | |||
| 7075-T651 | 0.250≤T≤0.499 | ≥78 | ≥67 | 9 | - | 0.20＜T≤0.28 | ≥510 | ≥434 | 5 | - | ||
| 0.500≤T≤1.000 | ≥78 | ≥68 | 7 | - | 0.28＜T≤0.99 | ≥524 | ≥462 | 8 | - | |||
| 1.001≤T≤2.000 | ≥77 | ≥67 | 6 | - | 0.99＜T≤3.18 | ≥538 | ≥469 | 9 | - | |||
| 2.001≤T≤2.500 | ≥76 | ≥64 | 5 | - | 3.18＜T≤4.75 | ≥545 | ≥476 | 9 | - | |||
| 2.501≤T≤3.000 | ≥72 | ≥61 | 5 | - | 4.75＜T≤6.32 | ≥552 | ≥476 | 9 | - | |||
| 3.001≤T≤3.500 | ≥71 | ≥58 | 5 | - | 6.32＜T≤12.67 | ≥538 | ≥462 | 9 | - | |||
| 3.501≤T≤4.000 | ≥67 | ≥54 | 3 | - | 12.67＜T≤25.4 | ≥538 | ≥469 | 8 | - | |||
| - | - | - | - | - | 25.4＜T≤50.8 | ≥531 | ≥462 | 6 | - | |||
| - | - | - | - | - | 50.8＜T≤63.5 | ≥524 | ≥441 | 5 | - | |||
| - | - | - | - | - | 63.5＜T≤76.2 | ≥496 | ≥421 | 5 | - | |||
| - | - | - | - | - | 76.2＜T≤88.9 | ≥490 | ≥400 | 5 | - | |||
| - | - | - | - | - | 88.9＜T≤101.6 | ≥462 | ≥372 | 3 | - | |||
| - | - | - | - | - | - | - | - | - | - | |||