Materials for sintered oil-retaining bearings DIN 30910-3:2004-11

Material

Abbrevi-ation

Permissible ranges Representive examples

Densitya Porosity Chemical composition(mass share)Radial

breaking strength

Hard-ness Density

a Porosity Chemical composition(mass share)Radial

breaking strength

Upsetting boundary

Hard-ness

Heat con-ductivity

Sint- x 100 C Cu Sn Fe others KC HB x 100b C Cu Sn Fe others KC d 0,2 HB

C

g/cm3 % % % % % % N/mm2 g/cm3 % % % % % N/mm2 N/mm2 W/mK

Sintered ironA 00B 00C 00

5,6 6,06,0 6,46,4 6,8

25 2,520 2,515 2,5

< 0,3 < 1,0Re-mai-ning

< 2> 150> 180> 220

> 25> 30> 40

5,96,36,7

252015

Re-mai-ning

< 0,2160190230

130160180

304050

374348

Sintered steel

cupriferousA 10B 10C 10

5,6 6,06,0 6,46,4 6,8

25 2,520 2,515 2,5

< 0,31 5

Re-mai-ning

< 2> 160> 190> 230

> 35> 40> 55

5,96,36,7

252015

2,0Re-mai-ning

< 0,2170200240

150170200

405065

363742

cupriferous and carbo-

niferousB 11 6,0 6,4 20 2,5

0,4

1,5

1 5

Re-mai-ning

< 2 > 270 > 70 6,3 20 0,6 2,0Re-mai-ning

< 0,2 280 160 80 28

higher cup-riferous

A 20B 20

5,8 6,26,2 6,6

25 2,520 2,5 < 0,3

15 25

Re-mai-ning

< 2 > 180> 200> 30> 45

6,66,4

2520 20,0

Re-mai-ning

< 0,2 200220140160

4050

4147

higher cupr- and carboni-

ferous

A 22B 22

5,5 6,06,0 6,54

25 2,520 2,5

0,5

3,0

15 25

Re-mai-ning

< 2 > 120> 140> 20> 25

5,76,1

2520 2,0

d 20,0Re-mai-ning

< 0,2 125145100120

2530

3037

Sintered bronze

A 50B 50C 50

6,4 6,86,8 7,27,2 7,7

25 2,520 2,515 2,5

< 0,2Re-mai-ning

9 11

< 2> 120> 170> 200

> 25> 30> 35

6,67,07,4

252015

Re-mai-ning

10,0 < 0,2140180210

100130160

303545

273237

graphit-iferous e

A 51B 51C 51

6,0 6,56,5 7,07,0 7,5

25 2,520 2,515 2,5

0,5

3,0

Re-mai-ning

9 11

< 2> 100> 150> 170

> 20> 25> 30

6,36,77,1

252015

1,5eRe-mai-ning

10,0 < 0,25120155175

80100120

203035

202632

a Non-impregnated Coeffi cient of thermal expansion a (independent of density)b The Oil content amounts to no less than 90 % of the open porosity Sintered iron and steel: a ~ 12 x 10 -6/Kc Measured on the calibrated bearings 10/16 x 10 Sintered bronze: a ~ 18 x 10 -6/Kd C occurs primarily as free graphitee C occurs as free graphite

VV

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