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Material overview of Sintered metals for bearings and moulded parts with gliding properties
Material
Sintered iron
Sintered
steel
Cu-
containing
Cu-and
C-containing
higher
Cu-
containing
higher
Cu-and C-
containing
Sintered
bronze
 
graphit
containing ⁴⁾
Abbreviation
SINT-
A 00
B 00
C 00
A 10
B 10
C 10
B 11
A 20
B 22
A 22
B 22
A 50
B 50
C 50
A 51
B 51
C 51
Permissible spans
Density Porosity Chemical composition
(mass of components)		 Radial
breaking
strength		 Hard-
ness
ρ ΔV
—×100¹⁾
V		 C Cu Sn Fe other K²⁾ HB
g ⁄cm³ % % % % % N ⁄mm²    
5.6 to 6.0
6.0 to 6.4
6.4 to 6.8		 25 ± 2.5
20 ± 2.5
15 ± 2.5
<0.3
<1.0
-
Balance
<2		 >150
>180
>220		 >25
>30
>40
5.6 to 6.0
6.0 to 6.4
6.4 to 6.8		 25 ± 2.5
20 ± 2.5
15 ± 2.5
<0.3		 1
to
5
-
Balance
<2		 >160
>190
>230		 >35
>40
>55

6.0 to 6.4
20 ± 2.5		 0.4
to
1.0		 1
to
5
-
Balance
<2
>270
>70
5.8 to 6.2
6.2 to 6.6		 25 ± 2.5
20 ± 2.5
<0.3		 15
to
25
-
Balance
<2		 >180
>200		 >30
>45
5.5 to 6.0
6.0 to 6.5		 25 ± 2.5
20 ± 2.5		 0.5
to
2.0		 15
to
25
-
Balance
<2		 >120
>140		 >20
>25
6.4 to 6.8
6.8 to 7.2
7.2 to 7.7		 25 ± 2.5
20 ± 2.5
15 ± 2.5
<0.2
Balance		 9
to
11
-
<2		 >120
>170
>200		 >25
>30
>35
6.0 to 6.5
6.5 to 7.0
7.0 to 7.5		 25 ± 2.5
20 ± 2.5
15 ± 2.5		 0.5
to
2.0
Balance		 9
to
11
-
<2		 >100
>150
>170		 >20
>25
>30

 

 

1) The oil content is at least 90% of the open porosity


2) Measured on calibrated bearings Ø 10/16 × 10


3) C is mainly present as free graphite


4) C is present as free graphite

Thermal expansion α (independent of density)


Sintered iron and steel: α ~ 12.10⁻⁶/K


Sintered bronze: α ~ 18.10⁻⁶/K

 

Representative examples
Density Porosity Chemical composition
(mass of components)		 Radial
breaking
strength		 Compr
ession
limit		 Hard-
ness		 Thermal conductivity
ρ ΔV
—×100 ¹⁾
V		 C Cu Sn Fe other K ²⁾ σd0.2 HB ²⁾ λ
g ⁄cm³ % % % % % % N ⁄mm² N ⁄mm²   W/mK
5.9
6.3
6.7		 25
20
15
-
-
-
Balance
<2		 160
190
230		 130
160
180		 30
40
50		 37
43
48
5.9
6.3
6.7		 25
20
15
-
2.0
-
Balance
<2		 170
200
240		 150
170
200		 40
50
65		 36
37
42
6.3 20 0.6 2.0 - Balance <2 280 160 80 28
6.0
6.4		 25
20		 - 20.0 - Balance <2 200
220		 140
160		 40
50		 41
47
5.7
6.1		 25
20		 20.0 ³⁾ 20.0 - Balance <2 125
145		 100
120		 25
30		 30
37
6.6
7.0
7.4		 25
20
15
-
Balance
10.0
-
<2		 140
180
210		 100
130
160		 30
35
45		 27
32
37
6.3
6.7
7.1		 25
20
15
1.5 ⁴⁾
Balance
10.0
-
<2		 120
155
175		 80
100
120		 25
30
35		 20
26
32