CuZn39Mn1AlPbSi (CW718R)

 

The additions of silicon and manganese give a good erosion resistance for the components of gear boxes and the bearings.

 

Chemical compound %

Agent
Cu
Al
Fe
Mn
Ni
Pb
Si
Sn
Zn
Other
Mass-volume g/cm3
Mini:

 57,0

0,3

-

0,8

-

0,2

0,2

-

Reste

-

8,2

Maxi:

59,0

1,3

0,5

1,8

0,5

0,8

0,8

0,5

-

0,3

 

Mechanical properties of forged parts (EN 12420) :

State
Hardness HB min.
Tensile strength Rm N/mm² min.
Conventional elastic limit at 0,2Rp0,2 N/mm² min.
Stretching A % min.

H090

90

(410)

(150)

(15)

H110

110

(440)

(180)

(15)

 

Mechanical properties of bars for general usings (EN 12163) :

State
Implementation
Diameter or size/flats mm
Tensile strength Rm N/mm˛ min.
Conventional elastic limit at 0,2Rp0,2 N/mm²
Stretching
Hardness
from
more than
until
A100mm % min.
A11,3 % min.
A % min.
HB min.
HB max.
HV min.
HV max.

M

 

3

-

80

-

-

-

-

-

-

 -

-

-

 R440

 

5

 -

40

440

 (200)

-

10

12

 -

 -

 -

 -

H100

 

5

-

40

-

-

-

-

-

100

-

105

-

 

Mechanical properties of bars for die forging (EN 12165) :

State
Nominal size of the straight section
Hardness
Tensile strength

Rm

N/mm˛ approx.

Conventional elastic limit at 0,2 %

Rp0,2

N/mm˛ approx.

Stretching

 A%

approx.

Diameter mm

Size on flat mm

from
until and included
from
until and included
HB min.
HV min.

M

All sizes

 

 

  

 

 

H130

6

80

6

60

130

135

(550)

(200)

(8)

 

Mechanical properties of sections and rectangular bars (EN 12167):

State
Sizes
Tensile strength Rm N/mm² min.
Conventional elastic limit at 0,2Rp0,2 N/mm²
Stretching A %
Hardness
Section
Rectangular bars thickness mm
> at
< or =
HB min.
HV min

M

All

All

 

 

 

 

 

R490

-

-

6

490

(320)

(8)

-

-

H130

-

-

6

-

-

-

130

135

R440

-

6

60

440

(200)

(12)

-

-

H110

-

6

60

-

-

-

110

115