SlidingBearingSelf-lubricating
Powder metallurgy sintered bearing bushing materials list

Sintered Sliding Bearing, Oil-impregnated, Self-lubricating, Maintenance-free
DIN 1850 / ISO 2795 as well as beyond this standard

Item Materials Composition% Density g/cm³ Porosity
% (min )
Strength Constant
"K"PSI
Tensile
Strength
PSI
Elongation
%, in 1"
Compressive Yield
Strength(0.1%) PSI
Equivalent Specifications Recommendations
1 Diluted Bronze Fe. 55 - 62
Cu: 34 - 38
Sn: 3 - 4
Other: 2.0 max
6.0 - 6.4 17 30,000       MPIF: FCTG - 3604 - K22 Low cost bearing material used at light to medium
loads and medium to high speed.
2 Bronze Cu: 87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max
6.0 - 6.4 22 19000 10000   7500 MPIF: CT- 1000 - K19
ASTM: B 438 - 83a
Class A, Type 1
General purpose bearing material
3 Bronze Cu: 87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max
6.4-6.8 19 26000 15000 2 11000 MPIF: CT - 1000 - K26
ASTM: B 438 - 83a,
Class A, Type II
DIN: SINT - A50
Ensure some ductility and also resist shock
loading.
4 Bronze Cu: 87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max
6.8-7.2 12 37000 20000 3 19500 MPIF: CT - 1000 - K37
ASTM: B 438 - 83a
Class A, Type III
DIN: SINT - B50
More ductility and will support higher loads. Used
in lower speed applications and are often used as a
combination of structural parts and bearings.
5 High Strength Bronze Cu: 87 - 89
Phos-Cu: 3
Sn: 8
Other: 1.0 max
6.8-7.2 12 40000 24000 3 21000 MPIF: CT - 1000 - K37
ASTM: B 438 - 83a
Class A, Type III
DIN: SINT - B50
Used for lower speed applications but has
excellent strength for combination of structural
parts and bearings.
6 Bronze (Medium Graphite) Cu: 85.7 - 90.0
Sn: 9.5 - 10.5
Graph.: 0.5 - 1.8
Other: 2.0 max
6.4-6.8 17 23000 12000 2 10000 MPIF: CT - 1001 - K23
ASTM: B 438 - 83a
Class B, Type II
DIN: SINT - B51
These bearings will operate under heavy loads and
high speeds and under moderately abrasive
conditions.

Sintered Sliding Bearing, Oil-impregnated, Self-lubricating, Maintenance-free
DIN 1850 / ISO 2795 as well as beyond this standard

Item Materials Composition% Density g/cm³ Porosity
% (min )
Strength Constant
"K"PSI
Tensile
Strength
PSI
Elongation
%, in 1"
Compressive Yield
Strength(0.1%) PSI
Equivalent Specifications Recommendations
1 Diluted Bronze Fe.55-62
Cu:34-38
Sn:3-4
Other:2.0 max
6.0-6.4 9 33000 15000 2 12000 MPIF:CT-1001-K33
ASTM:B438-83a
Class B,Type III
DIN:SINT-C51
These bearings will operate under heavy loads and
high speeds and under moderately abrasive
conditions.
2 Bronze Cu:87.2-90.5
Sn:9.5-10.5
Graphite:0-0.3
Other:2.0max
6.0-6.4 11 10000       MPIF: CTG - 1004 - K10 These bearings run very quietly. They tend to
require less field lubrication and operate at
somewhat higher temperatures.
3 Bronze Cu: 87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max
6.4-6.8 4 15000       MPIF: CTG - 1004 - K15 These bearings run very quietly. They tend to
require less field lubrication and operate at
somewhat higher temperatures.
4 Bronze Cu: 87.2 - 90.5
Sn: 9.5 - 10.5
Graphite: 0 - 0.3
Other: 2.0 max
6.8 - 7.2 20 23000 18000 1.5 16000 MPIF: F - 0000 - K23
ASTM: B 439 - 83
Grade 1
DIN: SINT - B00
Used as a bearing material for meduim loads.
Typically harder and stronger than 90-10 bronze
at same density.
5 High Strength Bronze Cu: 87 - 89
Phos-Cu: 3
Sn: 8
Other: 1.0 max
6.0 - 6.4 18 32000 35000 0.5 41000 MPIF: F - 0008 - K32
ASTM: B 439 - 83
Grade 2
DIN: SINT - B11
These bearings result in a stronger than pure iron
with higher crushing strength, greater wear
resistance and higher compressive strength.
6 Bronze (Medium Graphite) Cu: 85.7 - 90.0
Sn: 9.5 - 10.5
Graph.: 0.5 - 1.8
Other: 2.0 max
6.0 - 6.4 12 16000 15000 1   MPIF: FG - 0303 - K16 This material has excellent damping
characteristics and results in quiet running. May
be impregnated with oil.

 

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