3A21
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Description
Scope of supply of Aviation Group:
It can be customized non-standard, aluminum plate (whole plate/cut), aluminum rod, aluminum forgings, aluminum tubes, aluminum profiles, etc. Welcome to inquire!
1. Introduction to 3A21 Materials
3A21 is an Al-Mn-based alloy, which is an excellent rust military aluminum alloy material. 3A21 aluminum plate is a widely used anti-rust aluminum with low strength (only slightly higher than industrial pure aluminum) and cannot be strengthened by heat treatment. Therefore, cold processing methods are often used to improve its mechanical properties. It has high plasticity in annealed state, and it is still good when hardened semi-cooled work, low plasticity during hardening, good corrosion resistance, good welding, and poor cutting performance.
2. Chemical composition of 3A21
| Alloy Medal | silicon
And |
iron
Fe |
copper
Cu |
manganese
Mn |
magnesium
Mg |
chromium
Cr |
Zinc
Zn |
titanium
Of |
other | aluminum
AL |
|||||||||||||
| New grade | Old brand | 0.60 | 0.70 | 0.20 | 1.0-1.6 | 0.05 | – | 0.10 | 0.15 | Each | total | margin | |||||||||||
| 3A21 | LF21 | 0.05 | 0.10 | ||||||||||||||||||||
3. 3A21 physical properties
| Aluminum alloy grade and status | tensile strength
Rm/Mpa |
Yield of yield
Rp0.2/Mpa |
Elongation/% | Hardness/HBWα | density
(20 ℃) (g / cm3) |
| 3a21-h112 | 120 | – | 16 | – | 2.75 |
Four: Applicable areas
3A21 is mainly used for welding parts such as aerospace, military equipment, tooling and fixtures, automobiles, transportation, propellant storage boxes, welded structural cabin skins, end frames, brackets and other welded parts, as well as conduits that work in corrosive media.
