Phosphor Bronze (sometimes sold with the shorter name Phos Bronze or P B Casting) is an alloy of copper with 3.5 to 10% of tin and a significant phosphorus content of up to 1%. The phosphorus is added as deoxidizing agent during melting. These alloys are notable for their toughness, strength, low coefficient of friction, and fine grain. The phosphorus also improves the fluidity of the molten metal and thereby improves the castability, and improves mechanical properties by cleaning up the grain boundaries.

Specification of Phosphor Bronze Casting

Alloy

Cu

Fe

P

Sn

Zn

Metal Value $

Density

Electrical Conductivity% IACS

C510

94.9

-

0.2

5

-

1.15

0.32

15

C511

95.6

-

0.2

4.2

-

1.12

0.32

20

C521

92

-

0.19

8

-

1.24

0.318

13

C663

86

1.9

0.03

2.2

9.9

1.03

0.317

25

Physical Properties of Phosphor Bronze Casting

Grade B.S. 1400: 1985

Nominal Composition

2% PS N/mm Min

Tensile Strength N/mm Min

Elongation% Min

Brinell Hardness Min

PB1

89/10/01

130

250

5

60

PB1

88/12

140

260

7

80

PB1

90/10

130

250

5

60

PB1

90.5/9.5

130

240

5

80

LPB-1

87/8/2/3

80

175

7

60

Pbc2

88/12

120

195

5

60

Pbc2b

88/12

145

295

5

80

Chemical Composition of Phosphor Bronze Casting

Copper Alloys

CU

SN

PB

ZN

FE

NI

P

AL

SI

Impurities

PB-1 Standard : BS 1400

PB 1

Rem

10 Min

0.25

0.05

0.1

0.1

0.5 Min

0.01

0.02

0.6

PB-2 Standard : BS 1400

PB 2

Rem

11-13

0.5

0.3

0.15

0.5

0.15 Min

0.01

0.02

0.2

PB-4 Standard : BS 1400

PB-4

Rem

9.5 Min

0.75

0.5

-

0.5

0.4 Min

-

-

0.5

Phosphorus Bronze IS : 28 - 1985 Grade - 1 Standard : IS : 28 - 1985

Phosphorus Bz (Grade- 1)

Rem

6 - 8

0.25

0.5

0.3

0.7

0.3 - 0.5

0.01

0.2

1.2

Phosphorus Bronze IS : 28 - 1985 Grade - 2 Standard : IS : 28 - 1985

Phosphorus Bz (Grade - 2)

Rem

10 Min

0.25

0.5

0.1

0.1

0.5 Min

0.01

0.02

0.6

Phosphorus Bronze IS : 28 - 1985 Grade - 3 Standard : IS : 28 - 1985

Phosphorus Bz (Grade - 3)

Rem

6.5 - 8.5

2 - 5

2

-

1

0.3 Min

-

-

0.5

Phosphorus Bronze IS : 28 - 1985 Grade - 4 Standard : IS : 28 - 1985

Phosphorus Bz (Grade - 4)

Rem

9 - 11

0.25

0.05

0.05

0.25

0.15

-

-

0.8

Phosphorus Bronze IS : 28 - 1985 Grade - 5 Standard : IS : 28 - 1985

Phosphorus Bz (Grade - 5)

Rem

11 - 13.1

0.5

0.5

0.3

0.5

0.15 Min

-

-

0.2

Mechanical Properties of Phosphor Bronze Casting

Copper Alloys

Tensile Strength (Min.)

Elongation % (Min.)

Brinell Hardness (Min.)

Standard B S:1400, Grade - PB 1

220 Mpa.

3%

70 BHN.

Standard B S:1400, Grade - PB 2

220 Mpa.

5%

90 BHN.

Standard B S:1400, Grade - PB 3

230 Mpa.

6%

80 BHN.

Standard IS: 28-1985, Grade - 1

190 Mpa.

3%

60 BHN.

Standard IS: 28-1985, Grade - 2

220 Mpa.

3%

70 BHN.

Standard IS: 28-1985, Grade - 3

190 Mpa.

3%

60 BHN.

Standard IS: 28-1985, Grade - 4

230 Mpa.

6%

80 BHN.

Standard IS: 28-1985, Grade - 5

220 Mpa.

5%

90 BHN.

We are Suppliers and Exporters of Phosphor Bronze Casting
in Countries and Cities Like

Metco Overseas

We strive to build quality and durable products for our consumers. This value has enabled us to add immense efforts to our manufacturing processes & management.

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