PB1 Phosphor Bronze

Overview

PB1 Phosphor Bronze is a high strength material that is often referred to as ‘gear bronze’.

Components that are machined from PB1 are particularly durable in applications where high working loads and speeds are encountered, provided that there is good alignment and adequate lubrication. PB1 has good machining properties and good corrosion resistance to seawater and brine, making it suitable for pump and valve components.

All Kormax PB1 Phosphor Bronze is manufactured using finely controlled continuous or centrifugal casting techniques to ensure that hardness and strength is superior to sand-casting methods. This also means that the material has a fine grain structure and is free from porosity.

Machining Allowances

All Kormax PB1 Bronze bar has machining allowances added to the sizes quoted. To use 4-1/2” x 2-1/2” hollow bar as an example, this material would measure approximately 4.570” OD x 2.440” ID as supplied (see table below). Therefore this allows finished components measuring 4-1/2” OD x 2-1/2” ID to be easily manufactured from 4-1/2” x 2-1/2” hollow bar.

Machining allowances are as follows:

Outside Diameter Inside Diameter
Size Range Allowance Size Range Allowance
up to 3-3/4” +0.040” up to 3-3/4” -0.060”
4” to 5” +0.070” 4” to 5” -0.090”
5-1/4” to 6” +0.094” 5-1/4” to 6” -0.108”
6-1/4” to 20” +0.109” 6-1/4” to 18” -0.120”

Chemical Composition

Element Symbol Range (%) Nominal (%)
Tin Sn 10.0-11.0 10.5
Lead Pb 0.25 maximum
Zinc Zn 0.05 maximum
Nickel Ni 0.10 maximum
Iron Fe 0.10 maximum
Aluminium Al 0.01 maximum
Phosphorus P 0.50-1.0 0.7
Copper Cu Balance

Kormax Size Range

Kormax can also cut any size or shape to length at no extra cost

Solid Round
Solid Round (Diameter) KG/Mtr
1/2″ 1.64
3/4″ 3.00
1″ 5.12
1-1/4″ 7.88
1-1/2″ 11.13
1-5/8″ 13.01
1-3/4″ 15.04
2″ 19.53
2-1/4″ 24.61
2-1/2″ 30.28
3″ 42.76
3-1/2″ 57.98
4″ 75.91
4-1/2″ 95.70
5″ 116.65
6″ 168.52
7″ 229.34
7-1/2″ 262.73
8″ 298.39
10″ 463.70
Hollow Round
Hollow Round (O.D. x I.D.) KG/Mtr
1-1/2″ x 3/4″ * 9.10
1-1/2″ x 1″ 7.20
1-3/4″ x 3/4″ * 12.92
1-3/4″ x 1″ 11.05
2″ x 1″ 15.54
2″ x 1-1/4″ 13.08
2″ x 1-1/2″ 10.12
2-1/4″ x 1″ 20.62
2-1/4″ x 1-1/4″ 18.16
2-1/4″ x 1-1/2″ 15.11
2-1/2″ x 1″ 26.29
2-1/2″ x 1-1/2″ 20.78
2-1/2″ x 1-3/4″ 17.14
3″ x 1″ 38.83
3″ x 1-1/2″ 33.40
3″ x 2″ 26.01
3-1/4″ x 2-1/2″ 25.3
3-1/2″ x 2″ 42.15
3-1/2″ x 2-1/2″ 32.88
3-1/2″ x 2-3/4″ 26.2
4″ x 1″ 72.02
4″ x 1-1/2″ 66.64
4″ x 2″ 59.54
4″ x 2-1/2″ 49.48
4″ x 3″ 37.10
4-1/2″ x 2″ 78.77
4-1/2″ x 2-1/2″ 68.71
4-1/2″ x 3-1/2″ 42.41
115mm x 73mm 63.00
5″ x 2″ 100.85
5″ x 3″ 78.64
5″ x 4″ 48.80
133mm x 71mm 97.00
5-1/2″ x 2″ * 125.24
5-1/2″ x 3-1/2″ * 89.70
6″ x 2″ 151.76
6″ x 3″ 129.76
6″ x 4″ * 100.73
6″ x 5″ * 61.42
6-1/2″ x 5″ 90.45
7-1/2″ x 4″ 193.98
7-1/2″ x 5″ 154.10
7-1/2″ x 6″ 107.19
8″ x 6″ 142.86
Flat Bar
Flat Bar (T x W) KG/Mtr
18mm x 250mm 44.00
50mm x 100mm 49.80

Use the Product Finder for product recommendations, based on the dimension of your finished size.


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