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Characteristics for grade     BrА7   ( БрА7 )



      Grade :   BrА7   ( БрА7 ) (   CuA18   )
      Classification :   Tin-free pressure-worked bronzes
      Equivalent grades:   Go here



Chemical composition in % for grade   BrА7   ( БрА7 )
Fe Si Mn PAl Cu PbZn Sn Impurity
max   0.5max   0.1max   0.5max   0.016 - 890.9 - 94max   0.03max   0.5max   0.1 all 1.1
Comment: Cu is a basis; the percentage of Cu is given approximately.


Mechanical properties under Т=20oС for grade   BrА7   ( БрА7 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Band, GOST 1048- 79     570-780470-7603-5   
soft     440-500  65-75   
hard     950-1030  2-4   


    Brinell hardness for     BrА7   ( БрА7 )   ,     soft HB 10 -1 = 65 - 75   MPa
    Brinell hardness for     BrА7   ( БрА7 )   ,     hard HB 10 -1 = 200 - 220   MPa


Friction coefficient of the material   BrА7   ( БрА7 ) .
 Friction coefficient with oil : 0.012


Technological properties of the material   BrА7   ( БрА7 ) .
        Melting temperature : 1040   °C
        Forging temperature : 750 - 850   °C
        Annealing temperature : 600 - 700   °C


Physical properties for grade   BrА7   ( БрА7 )
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 1.2   80 7800   110
100   17.8        


Equivalent steels for grade     BrА7   ( БрА7 )
Warning! Indicated both exact and nearest equivalents.
Germany
DIN,WNr
2.0920
CuAl8



Types of delivery of grade   BrА7   ( БрА7 )
В54 - Ribbons


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]

  BrА7   ( БрА7 ) - Tin-free pressure-worked bronzes: 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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