3A21H112 extruded aluminum bar rod for propellant tanks

3A21 H112 extruded aluminum bar rod is Al-Mn alloy, 3A21 aluminum rod is a widely used rust-proof aluminum, the strength is not high, and can not be heat-treated and strengthened, so cold processing method is often used to improve its mechanical properties; high plasticity in annealed state The plasticity is good in the semi-cold hardening, the plasticity is low in the cold work hardening, the corrosion resistance is good, the weldability is good, and the machinability is poor.

3A21 H112 extruded aluminum bar rod is mainly used for propellant tanks, welded parts such as skins, end frames, brackets, etc., and ducts that work in corrosive media.
Chemical composition of 3A21 H112 extruded aluminum bar rod

Element	SI	Fe	Cu	Mn	Mg	Cr	Zn	Ti	Zr	Al
3A21	≤0.6	≤0.7	≤0.2	1.0-1.6	≤0.05	_	≤0.1	≤0.15	_	Rem

Mechanical property of 3A21 H112 extruded aluminum bar rod

Temper	Rm(Mpa)	Rp0.2（Mpa）	Elongation A（%）	Hardness HBW
H112	≤167	_	20	_

Author: Frank

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