Grade :

    CuSn7Zn4Pb7-B

    Number:

    CB493K

    Classification:

    Copper-tin-lead alloy

Fe

Si

Ni

P

S

Al

Cu

Pb

Zn

Sb

Sn

-

max   0.2

max   0.01

max   2

max   0.03

max   0.08

max   0.01

81 - 84.5

5.2 - 8

2.3 - 5

max   0.3

6.2 - 8

Cu including Ni

Rm - Tensile strength (MPa) (GS) or (GM)

230

Rm - Tensile strength (MPa) (GZ) or (GC)

260

Rp0.2 0.2% proof strength (MPa) (GS) or (GM)

120

Rp0.2 0.2% proof strength (MPa) (GZ) or (GC)

120

A - Min. elongation at fracture (%) (GS)

15

A - Min. elongation at fracture (%) (GM) or (GZ) or (GC)

12

  Brinell hardness   (HBW):   (GS) or (GM)

60

  Brinell hardness   (HBW):   (GZ) or (GC)

70