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Characteristics for grade     АL21   ( АЛ21 )



      Grade :     АL21   ( АЛ21 )
      Classification :   Aluminium casting alloys
      Equivalent grades:     Is absent



Chemical composition in % for grade   АL21   ( АЛ21 )
Fe Si Mn Ni CrAl Cu Mg Zn Impurity
max   0.6max   0.50.15 - 0.252.6 - 3.60.1 - 0.287.35 - 91.754.6 - 60.8 - 1.3max   0.3 all 1.3
Comment: Al is a basis; the percentage of Al is given approximately.


Mechanical properties under Т=20oС for grade   АL21   ( АЛ21 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      180-210  1    
sand (mould) casting     220 200 1.5    


    Brinell hardness for     АL21   ( АЛ21 )   ,       HB 10 -1 = 65 - 75   MPa


Technological properties of the material   АL21   ( АЛ21 ) .
        Linear shrinkage : 1.3   %


Physical properties for grade   АL21   ( АЛ21 )
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m
20     117.6 2830    
100   22.9        




Specification :
Mechanical properties :
sв - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture , [ % ]
y - Reduction of area , [ % ]
KCU - Impact strength , [ kJ / m2]
HB - Brinell hardness , [MPa]

Physical properties :
T - Test temperature , [Grade]
E - Young modulus , [MPa]
a - Coefficient of linear expansion (range 20o - T ) , [1/Grade]
l - Termal (heat) condition coefficient , [Watt/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

  АL21   ( АЛ21 ) - Aluminium casting alloys: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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