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7175 7075 Aluminum forgings forged product parts

7175 improves the purity of 7075 alloy. It is mainly used as die forgings. It has three heat treatment states: T66, T74 and T7452. Among them, the static strength of T66 forging is higher than that of 7075 T6 forging, while fatigue, crack resistance and stress corrosion resistance are equivalent. The static strength of T74 die forging and free forging is similar to that of 7075 T6 forging, and the stress corrosion resistance balance is between 7075 T73 and 7075 T76, while the toughness and fatigue properties are comparable to or even better than 7075 T73 forging. The stress corrosion resistance of T74 state is obviously higher than that of 7075 T6 state, approaching 7075 T73 state.
7175 alloy is specially used to produce forgings and rolling rings. The material state is T74. The characteristics of 7175 T74 aluminium alloy forgings are that special processing and heat treatment processes are adopted to make the strength close to 7075 T6 alloy forgings and the stress corrosion resistance close to 7075 T73 forgings in the best corrosion state. The reduction of Fe and Si rolling can not only improve the forging properties of the alloy, but also significantly improve the stress corrosion resistance and fracture toughness of the forgings.

7075 aluminium forgings

7075 aluminium forgings are high strength deformed aluminium alloys strengthened by heat treatment at any time. They can produce products of various kinds and sizes. They are the most widely used high strength aluminium alloys at present. It has several heat treatment states: T6, T73 and T76. The strength of T6 state is the highest, but the fracture toughness is low.

7175 7075 Aluminum Alloy Chemical Composition
Alloy Si Fe Cu Mn Mg Cr Ni Zn Ti Zr Others Al
Single Total
7175 0.15 0.20 1.2~2.0 0.1 2.1~2.9 0.18~0.28 ~ 5.1~6.1 0.10 ~ 0.05 0.15 Rest
7075 0.40    0.50 1.2~2.0 0.3 2.1~2.9 0.18~0.28 ~ 5.1~6.1 0.20 ~ 0.05 0.15   Rest

7175 aluminium forgings

7175 T74 Alloy Rolled Forged Ring
Technical Indicators for 7075 T74 Aluminum Alloy Forging
Direction Rm/MPa Rp0.2/MPa A5/% KIC/(N.mm-2).m1/2 Conductivity/(MS.m-1)
portrait 490 420 9 33.0 22.6
Long transverse 483 400 5 27.5
 Section transverse 469 393 4 23.1
Calibrated Mechanical Properties of 7175 T74 Alloy Rolled Forged Ring (YS/T 478)
Direction Thickness/mm Tension Strength Rm/MPa Yield strength Rp0.2/MPa Elongation A5/%
L <80 ≥505 ≥435 ≥8
Alloy Temper Aircraft model Application parts and typical parts
7175 T74
A320、Z10、EC120 etc。 Front edge, window frame, fairing joint, control parts, etc.
Type Alloy Projected area(m2)Or weight(kg) Temper Standard
Aluminum free forging 5 series ≤3000kg O、F 、T74
2、6、7 series ≤3000kg T6、T4、O、F
Aluminum die forging 5 series ≤2.5m2 O、F
2、6、7series ≤2.5m2 T6、T4、O、F、T74

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