Materials

AB2 Nickel Aluminium Bronze

Overview

Alloy AB2 is a nickel aluminium bronze that is widely used in marine applications. The nickel content in this material means that it has superior corrosion resistance to marine conditions. AB2 also has high strength and good wear resistance, making it suitable for bearings, gears and other components with heavy loads and slow speeds. Good lubrication and alignment are required to ensure optimum performance.

Common Applications

Bushings
Gears
Marine Hardware
Propeller Blades
Propeller Hubs
Sea Water Valves
Shafts
Valve Bodies
Worm Wheels & Worms

Key Features

Suitable for marine applications
Superior corrosion resistance
Superior wear resistance

Material Profile

Profile
Size Range
Metric Size Range (mm)
Imperial Size Range (in)
NZ (Availability)
AUS (Availability)
Manufacturing Method
Solid Round Bar
See Size Range
22.23 to 250.00 (OD)
7⁄8 to 8 (OD)
Stocked
Indent
Continuous Cast
Hollow Round Bar
See Size Range
50.80 to 342.90 (OD)
2 to 13 1⁄2 (OD)
Stocked
Indent
Continuous Cast & Centrifugal
Diameter (mm)
Diameter (inch)
Weight (Kg/MTR)
22.23
7⁄8
3.70
25.40
1
4.99
38.10
1-1⁄2
10.19
44.45
1-¾
13.35
50.80
2
17.53
57.15
2-¼
21.68
63.50
2-1⁄2
27.02
69.85
2-¾
32.06
76.20
3
38.94
88.90
3-1⁄2
52.47
101.60
4
67.36
114.30
4-1⁄2
86.22
127.00
5
104.73
139.70
5-1⁄2
126.05
152.40
6
149.35
203.20
8
264.87
250.00
-
393.00
OD x ID (mm)
OD x ID (inch)
Kg/MTR
50.8 X 25.4
2 X 1
14.74
63.5 X 25.4
2-1⁄2 X 1
24.22
63.5 X 38.1
2-1⁄2 X 1-1⁄2
19.80
69.85 X 44.45
2-¾ X 1-¾
22.32
76.2 X 38.1
3 X 1-1⁄2
31.83
76.2 X 50.8
3 X 2
25.45
88.9 X 25.4
3-1⁄2 X 1
47.10
88.9 X 38.1
3-1⁄2 X 1-1⁄2
45.36
88.9 X 50.8
3-1⁄2 X 2
38.98
88.9 X 63.5
3-1⁄2 X 2-1⁄2
30.59
101.6 X 50.8
4 X 2
54.52
101.6 X 76.2
4 X 3
35.73
114.3 X 50.8
4-1⁄2 X 2
72.87
114.3 X 63.5
4-1⁄2 X 2-1⁄2
64.56
114.3 X 76.2
4-1⁄2 X 3
54.26
127 X 50.8
5 X 2
92.40
127 X 76.2
5 X 3
73.80
127 X 101.6
5 X 4
47.66
139.7 X 76.2
5-1⁄2 X 3
94.41
139.7 X 101.6
5-1⁄2 X 4
68.09
152.4 X 76.2
6 X 3
117.71
152.4 X 101.6
6 X 4
92.27
177.8 X 101.6
7 X 4
146.17
203.2 X 127
8 X 5
173.45
342.9 X 279.4
13-1⁄2 X 11
269.71

Chemical Composition

Element Symbol Range % Nominal %
Aluminium Al 8.8-10.0 9.5
Iron Fe 4.0-5.5 4.8
Nickel Ni 4.0-5.5 5.0
Manganese Mn 3.0 maximum
Tin Sn 0.1 maximum
Lead Pb 0.03 maximum
Zinc Zn 0.5 maximum
Copper Cu Balance

Mechanical Properties

Metric Imperial
Tensile Strength Min 586 N/mm² 85000 psi
Yield Strength Min 241 N/mm² 35000 psi
Elongation Min 18% 18%
Hardness Min 159 BHN 159 BHN

Machining Allowances

All Kormax AB2 Nickel Aluminium 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 4.620″ to 4.660″ OD x 2.346″ to 2.392″ 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.

Size Range OD Allowance ID Allowance
up to 3″ +0.053″ to +0.073″ -0.108″ to -0.154″
3-1/4″ to 4″ +0.079″ to +0.109″ -0.108″ to -0.174″
4-1/4″ to 5-1/2″ +0.120″ to +0.160″ -0.125″ to -0.221″
5-3/4″ to 6-1/4″ +0.163″ to +0.214″ -0.135″ to -0.231″
6-1/2″ to 10″ +0.180″ to +0.230″ -0.190″ to -0.286″
Above 10″ +0.125″ -0.125″

Comparative Specifications

BS1400 – AB2

AS1565 C95810

JIS H5121 – CAC703C (A1BC3)

DIN 1714 – G-CuAl10Ni

ISO 1338 – CuAl10Fe5Ni5

BS EN 1982 CuAl10Fe5Ni5

Resources

Data Sheet

Alloy AB2 (Nickel Aluminium Bronze) Data Sheet

PDF (93 KB)

https://www.kormax.com/wp-content/uploads/2022/11/Alloy-AB2-Nickel-Aluminium-Bronze-Material-Data-Sheet-Updated-1.pdf

Blog

What is Bronze and Bronze Alloy-Naming Systems and Standards?

Resource

Bronze Manufacturing Processes

PDF (702 KB)

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