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America SAE ZK21A Magnesium Alloy Extrusions 2.3Zn - 0.62Zr (ZK21A-F) As Extruded and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: ZK21A / ZK21A
Category Grade Standard Region/Area Standard Content
Metals ZK21A SAE AMS 4387E America Magnesium Alloy Extrusions 2.3Zn - 0.62Zr (ZK21A-F) As Extruded

Chemical composition(mass fraction)(wt.%) of the ZK21A

Element Min Max Similar

Mechanical Properties of steel grade ZK21A

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
981 (≥) 957 (≥) 44 33 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical Properties of steel grade ZK21A

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
13 - -     0.14 -  
787 651 - 34.3 331   -  
448 - 21 24.2   334 211

Heat Treatment of steel grade ZK21A

Heat treated : 1834°C - 1659°C

Technological Curves of steel grade ZK21A

Cross Reference Table (Equivalent Grade) of ZK21A

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