Screw cutting brass with a high lead content for favouring fractionation of chips, it allows the working at high speed while reducing at the minimum the tools sharpening. Bad cold working, it is used for the mass production works. |
Chemical compound % |
Agent |
Cu |
Al |
As |
Fe |
Mn |
Ni |
Pb |
Sn |
Zn |
Other |
Mass-volume g/cm3 |
Mini: |
57,0
|
-
|
-
|
-
|
-
|
-
|
2,5
|
- |
Reste |
-
|
8,4 |
Maxi: |
59,0
|
0,05
|
-
|
0,3
|
-
|
0,3
|
3,5
|
0,3 |
- |
0,2
|
|
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. |
M
|
-
|
-
|
-
|
-
|
H075
|
75
|
(340)
|
(110)
|
(20)
|
H080 |
80 |
(360) |
(120) |
(20) |
|
Mechanical properties of bars for screw cutting (EN 12164) : |
State |
Nominal size of the straight section |
Tensile strength Rm N/mm˛ min. |
Conventional elastic limit at 0,2Rp0,2 N/mm² |
Stretching |
Hardness
HB
ou HV
approx |
Diameter
mm |
Size on flat mm |
from |
more than |
until and included |
from |
more than |
until and included |
A100mm
% min. |
A11,3
% min. |
A
% min. |
M |
2 |
- |
80 |
2 |
- |
60 |
|
|
|
|
|
|
R400 |
6 |
- |
14 |
5 |
- |
10 |
400 |
(160) |
- |
12 |
15 |
(90) |
R380 |
- |
14 |
40 |
- |
10 |
35 |
380 |
(160) |
- |
- |
18 |
(90) |
R360 |
- |
40 |
80 |
- |
35 |
60 |
360 |
(150) |
- |
- |
20 |
(90) |
R430 |
2 |
- |
40 |
2 |
- |
35 |
430 |
(250) |
6 |
8 |
10 |
(120) |
R500 |
2 |
- |
14 |
2 |
- |
10 |
500 |
(390) |
(4) |
6 |
8 |
(150) |
R550 |
2 |
- |
6 |
2 |
- |
5 |
550 |
(420) |
- |
- |
- |
(150) |
|
Mechanical properties of cored bars for screw cutting (EN 12168) : |
State
|
Nominal thickness of the walls mm.
|
Hardness
|
Tensile strength
|
Conventional elastic limit at 0,2%
|
Stretching
|
HB
|
HV
|
Rm
N/mm² approx.
|
Rp0,2
N/mm² approx.
|
A
% approx.
|
until and included |
more than
|
min.
|
max.
|
min.
|
max.
|
M
|
All
|
Untreated
|
H110
|
10
|
-
|
110
|
160
|
120
|
170
|
(430)
|
(250)
|
(10)
|
H090
|
-
|
10
|
90
|
140
|
100
|
150
|
(380)
|
(160)
|
(18)
|
|
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 |
|
|
|
|
|
H080 |
6 |
80 |
6 |
60 |
80 |
85 |
(350) |
(140) |
(15) |
|
Mechanical properties of wires (EN 12166) : |
State |
Diameter |
Tensile strength Rm N/mm˛ |
Conventional elastic limit at 0,2Rp0,2 N/mm² |
Stretching |
Hardness
HV |
from |
more than |
until |
min. |
Max. |
A100mm
% min. |
A11,3
% min. |
A
% min. |
min. |
max. |
M |
All sizes |
- |
- |
- |
- |
- |
- |
- |
- |
R450 |
0,5 |
- |
1,5 |
450 |
- |
(200) |
- |
- |
- |
- |
- |
R430 |
- |
1,5 |
4,0 |
430 |
- |
(200) |
6 |
- |
- |
- |
- |
H130 |
1,5 |
- |
4,0 |
- |
- |
- |
- |
- |
- |
130 |
165 |
R420 |
- |
4,0 |
8,0 |
420 |
- |
(200) |
- |
8 |
- |
- |
- |
H120 |
- |
4,0 |
8,0 |
- |
- |
- |
- |
- |
- |
120 |
155 |
R410 |
- |
8,0 |
14,0 |
410 |
- |
(200) |
- |
- |
10 |
- |
- |
R400 |
- |
14,0 |
20,0 |
400 |
- |
(200) |
- |
- |
10 |
- |
- |
H110 |
- |
8,0 |
20,0 |
- |
- |
- |
- |
- |
- |
110 |
145 |
R520 |
0,5 |
- |
1,5 |
520 |
- |
(400) |
- |
- |
- |
- |
- |
R510 |
- |
1,5 |
4,0 |
510 |
- |
(400) |
(4) |
- |
- |
- |
- |
H155 |
1,5 |
- |
4,0 |
- |
- |
- |
- |
- |
- |
155 |
185 |
R500 |
- |
4,0 |
8,0 |
500 |
- |
(390) |
- |
6 |
- |
- |
- |
R490 |
- |
8,0 |
14,0 |
490 |
- |
(390) |
- |
- |
8 |
- |
- |
H145 |
- |
4,0 |
14,0 |
- |
- |
- |
- |
- |
- |
145 |
175 |
R570 |
1,5 |
- |
4,0 |
570 |
- |
(520) |
- |
- |
- |
- |
- |
H170 |
1,5 |
- |
4,0 |
- |
- |
- |
- |
- |
- |
170 |
- |
|
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 |
|
|
|
|
|
R480
|
-
|
-
|
6
|
480
|
(330)
|
(5)
|
-
|
-
|
H130 |
- |
- |
6 |
- |
- |
- |
130 |
135 |
R430 |
- |
6 |
60 |
430 |
(200) |
(15) |
- |
- |
H110 |
- |
6 |
60 |
- |
- |
- |
110 |
115 |
|