Materials

LG2 Leaded Gunmetal Bronze

Overview

LG2 Bronze is one of the most used grades of bronze in industry. It has medium strength, excellent machining properties, and is suitable for bearings, gears and other components used in relatively light duty applications. Although LG2 is often referred to as phosphor bronze, it is in fact a leaded gunmetal. Only the “PB” group of bronzes (PB1, PB2 etc) can truly be called phosphor bronze. All Kormax LG2 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.

Common Applications

Air Actuators
Architecture
Couplings
Electrical Hardware
Plumbing Fixtures and Pipe fittings
Heating Equipment
Impellers
Marine Parts
Medium load Bearings
Printing Presses
Pump Parts
Small Gears
Transducer Housings
Valve Bodies and Valves

Key Features

Excellent machining properties
Medium strength
Good pressure tightness
Not subject to dezincification
Reasonable corrosion resistance to seawater

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
12.70 to 304.80 (OD)
1⁄2 to 12 (OD)
Stocked
Stocked
Continuous Cast
Hollow Round Bar
See Size Range
25.40 to 381.00 (OD)
1 to 15 (OD)
Stocked
Stocked
Continuous Cast & Centrifugal
Diameter (mm)
Diameter (inch)
Weight (Kg/MTR)
12.70
1⁄2
1.42
15.88
5⁄8
2.15
19.05
¾
3.03
22.23
7⁄8
4.06
25.40
1
5.18
28.58
1-1⁄8
6.50
31.75
1-¼
7.96
34.93
1-3⁄8
9.58
38.10
1-1⁄2
11.24
41.28
1-5⁄8
13.14
44.45
1-¾
15.19
50.80
2
19.73
57.15
2-¼
24.86
63.50
2-1⁄2
30.58
69.85
2-¾
36.38
76.20
3
43.19
82.55
3-¼
50.58
88.90
3-1⁄2
58.56
95.25
3-¾
66.48
101.60
4
76.67
114.30
4-1⁄2
96.66
120.70
4-¾
106.48
127.00
5
117.82
139.70
5-1⁄2
143.43
152.40
6
170.21
165.10
6-1⁄2
200.20
177.80
7
231.63
203.20
8
301.38
228.60
9
380.30
254.00
10
468.00
304.80
12
672.05
T x W (mm)
T x W (inch)
Kg/MTR
T x W (mm)
T x W (inch)
Kg/MTR
A/F (mm)
A/F (inch)
Kg/MTR
T x W x H (mm)
T x W x H (inch)
Kg/MTR
OD x ID (mm)
OD x ID (inch)
Kg/MTR
25.4 X 12.7
1 X 1⁄2
4.48
25.4 X 19.05
1 X ¾
3.19
28.58 X 12.7
1-1⁄8 X 1⁄2
5.74
28.58 X 19.05
1-1⁄8 X ¾
4.53
31.75 X 12.7
1-¼ X 1⁄2
7.20
31.75 X 15.9
1-¼ X 5⁄8
6.64
31.75 X 19.05
1-¼ X ¾
5.94
31.75 X 25.4
1-¼ X 1
4.07
34.93 X 19.05
1-3⁄8 X ¾
7.55
38.1 X 12.7
1-1⁄2 X 1⁄2
10.59
38.1 X 19.05
1-1⁄2 X ¾
9.32
38.1 X 25.4
1-1⁄2 X 1
7.45
41.28 X 19.05
1-5⁄8 X ¾
11.14
41.28 X 25.4
1-5⁄8 X 1
9.37
41.28 X 31.8
1-5⁄8 X 1-¼
6.91
44.45 X 12.7
1-¾ X 1⁄2
14.44
44.45 X 19.05
1-¾ X ¾
13.18
44.45 X 25.4
1-¾ X 1
11.33
44.45 X 31.8
1-¾ X 1-¼
8.97
44.45 X 38.1
1-¾ X 1-1⁄2
5.91
50.8 X 19.05
2 X ¾
17.72
50.8 X 25.4
2 X 1
15.87
50.8 X 31.8
2 X 1-¼
13.43
50.8 X 38.1
2 X 1-1⁄2
10.49
50.8 X 44.45
2 X 1-¾
6.83
57.15 X 19.05
2-¼ X ¾
22.85
57.15 X 25.4
2-¼X 1
21.00
57.15 X 31.8
2-¼ X 1-¼
18.56
57.15 X 38.1
2-¼ X 1-1⁄2
15.53
57.15 X 44.45
2-¼ X 1-¾
11.90
57.15 X 50.8
2-¼ X 2
8.40
63.5 X 12.7
2-1⁄2 X 1⁄2
29.83
63.5 X 19.05
2-1⁄2 X ¾
28.58
63.5 X 25.4
2-1⁄2 X 1
26.73
63.5 X 31.8
2-1⁄2 X 1-¼
24.29
63.5 X 38.1
2-1⁄2 X 1-1⁄2
21.25
63.5 X 44.45
2-1⁄2 X 1-¾
17.63
63.5 X 50.8
2-1⁄2 X 2
13.41
69.85 X 25.4
2-¾ X 1
32.58
69.85 X 31.8
2-¾ X 1-¼
30.61
69.85 X 38.1
2-¾ X 1-1⁄2
27.57
69.85 X 44.45
2-¾ X 1-¾
23.95
69.85 X 50.8
2-¾ X 2
19.73
69.85 X 57.15
2-¾ X 2-¼
14.92
76.2 X 25.4
3 X 1
39.39
76.2 X 31.8
3 X 1-¼
36.99
76.2 X 38.1
3 X 1-1⁄2
34.00
76.2 X 44.45
3 X 1-¾
30.85
76.2 X 50.8
3 X 2
26.64
76.2 X 57.15
3 X 2-¼
21.82
76.2 X 63.5
3 X 2-1⁄2
17.30
82.55 X 25.4
3-¼ X 1
46.79
82.55 X 31.8
3-¼ X 1-¼
44.38
82.55 X 38.1
3-¼ X 1-1⁄2
41.29
82.55 X 44.45
3-¼ X 1-¾
37.82
82.55 X 50.8
3-¼ X 2
33.66
82.55 X 57.15
3-¼ X 2-¼
29.33
82.55 X 63.5
3-¼ X 2-1⁄2
23.92
82.55 X 69.85
3-¼ X 2-¾
18.85
88.9 X 25.4
3-1⁄2 X 1
54.77
88.9 X 31.8
3-1⁄2 X 1-¼
52.36
88.9 X 38.1
3-1⁄2 X 1-1⁄2
49.37
88.9 X 44.45
3-1⁄2 X 1-¾
45.80
88.9 X 50.8
3-1⁄2 X 2
41.64
88.9 X 57.15
3-1⁄2 X 2-¼
36.90
88.9 X 63.5
3-1⁄2 X 2-1⁄2
32.02
88.9 X 69.85
3-1⁄2 X 2-¾
26.02
88.9 X 76.2
3-1⁄2 X 3
20.26
95.25 X 25.4
3-¾ X 1
62.73
95.25 X 31.8
3-¾ X 1-¼
60.93
95.25 X 38.1
3-¾ X 1-1⁄2
57.94
95.25 X 44.45
3-¾ X 1-¾
54.36
95.25 X 50.8
3-¾ X 2
50.21
95.25 X 57.15
3-¾ X 2-¼
45.46
95.25 X 63.5
3-¾ X 2-1⁄2
40.14
95.25 X 69.85
3-¾ X 2-¾
34.23
95.25 X 76.2
3-¾ X 3
28.12
101.6 X 25.4
4 X 1
72.91
101.6 X 38.1
4 X 1-1⁄2
67.57
101.6 X 44.45
4 X 1-¾
64.03
101.6 X 50.8
4 X 2
60.49
101.6 X 57.15
4 X 2-¼
55.75
101.6 X 63.5
4 X 2-1⁄2
50.42
101.6 X 69.85
4 X 2-¾
44.45
101.6 X 76.2
4 X 3
38.02
101.6 X 82.55
4 X 3-¼
31.37
101.6 X 88.9
4 X 3-1⁄2
24.14
107.95 X 50.8
4-¼ X 2
69.62
107.95 X 69.85
4-¼ X 2-¾
54.31
107.95 X 76.2
4-¼ X 3
47.82
107.95 X 82.55
4-¼ X 3-¼
40.74
107.95 X 88.9
4-¼ X 3-1⁄2
33.08
114.3 X 38.1
4-1⁄2 X 1-1⁄2
87.56
114.3 X 50.8
4-1⁄2 X 2
79.91
114.3 X 57.15
4-1⁄2 X 2-¼
75.21
114.3 X 63.5
4-1⁄2 X 2-1⁄2
69.94
114.3 X 69.85
4-1⁄2 X 2-¾
64.09
114.3 X 76.2
4-1⁄2 X 3
58.21
114.3 X 82.55
4-1⁄2 X 3-¼
51.13
114.3 X 88.9
4-1⁄2 X 3-1⁄2
43.47
114.3 X 95.25
4-1⁄2 X 3-¾
35.22
114.3 X 101.6
4-1⁄2 X 4
27.12
120.65 X 50.8
4-¾ X 2
90.77
120.65 X 69.85
4-¾ X 2-¾
74.95
120.65 X 76.2
4-¾ X 3
68.52
120.65 X 82.55
4-¾ X 3-¼
62.10
120.65 X 88.9
4-¾ X 3-1⁄2
54.44
120.65 X 95.25
4-¾ X 3-¾
46.19
120.65 X 101.6
4-¾ X 4
37.73
127 X 38.1
5 X 1-1⁄2
108.81
127 X 50.8
5 X 2
102.22
127 X 57.15
5 X 2-¼
97.52
127 X 63.5
5 X 2-1⁄2
92.25
127 X 69.85
5 X 2-¾
86.40
127 X 76.2
5 X 3
79.96
127 X 88.9
5 X 3-1⁄2
65.37
127 X 101.6
5 X 4
49.28
127 X 107.95
5 X 4-¼
39.89
133.35 X 76.2
5-¼ X 3
93.17
133.35 X 88.9
5-¼ X 3-1⁄2
78.57
133.35 X 101.6
5-¼ X 4
62.62
133.35 X 107.95
5-¼ X 4-¼
53.22
139.7 X 63.5
5-1⁄2 X 2-1⁄2
116.97
139.7 X 76.2
5-1⁄2 X 3
104.81
139.7 X 88.9
5-1⁄2 X 3-1⁄2
91.23
139.7 X 95.25
5-1⁄2 X 3-¾
82.27
139.7 X 101.6
5-1⁄2 X 4
74.68
139.7 X 114.3
5-1⁄2 X 4-1⁄2
56.03
152.4 X 50.8
6 X 2
153.63
152.4 X 63.5
6 X 2-1⁄2
143.76
152.4 X 76.2
6 X 3
131.60
152.4 X 88.9
6 X 3-1⁄2
117.14
152.4 X 101.6
6 X 4
101.73
152.4 X 114.3
6 X 4-1⁄2
82.55
152.4 X 127
6 X 5
61.63
152.4 X 139.7
6 X 5-1⁄2
38.81
165.1 X 76.2
6-1⁄2 X 3
161.58
165.1 X 88.9
6-1⁄2 X 3-1⁄2
147.13
165.1 X 101.6
6-1⁄2 X 4
130.74
165.1 X 114.3
6-1⁄2 X 4-1⁄2
111.75
165.1 X 127
6-1⁄2 X 5
91.34
165.1 X 139.7
6-1⁄2 X 5-1⁄2
68.73
171.45 X 127
6-¾ X 5
105.90
171.45 X 139.7
6-¾ X 5-1⁄2
84.31
177.8 X 76.2
7 X 3
193.02
177.8 X 101.6
7 X 4
162.18
177.8 X 114.3
7 X 4-1⁄2
143.19
177.8 X 127
7 X 5
121.90
177.8 X 139.7
7 X 5-1⁄2
100.48
177.8 X 152.4
7 X 6
74.47
190.5 X 101.6
7-1⁄2 X 4
195.91
190.5 X 127
7-1⁄2 X 5
155.63
190.5 X 139.7
7-1⁄2 X 5-1⁄2
133.25
190.5 X 152.4
7-1⁄2 X 6
107.49
190.5 X 165.1
7-1⁄2 X 6-1⁄2
81.74
203.2 X 76.2
8 X 3
262.77
203.2 X 101.6
8 X 4
232.65
203.2 X 114.3
8 X 4-1⁄2
213.75
203.2 X 127
8 X 5
192.55
203.2 X 139.7
8 X 5-1⁄2
169.27
203.2 X 152.4
8 X 6
143.51
203.2 X 165.1
8 X 6-1⁄2
116.99
203.2 X 177.8
8 X 7
87.59
215.9 X 139.7
8-1⁄2 X 5-1⁄2
207.58
215.9 X 152.4
8-1⁄2 X 6
181.82
215.9 X 165.1
8-1⁄2 X 6-1⁄2
155.30
215.9 X 177.8
8-1⁄2 X 7
125.08
228.6 X 101.6
9 X 4
311.56
228.6 X 152.4
9 X 6
222.43
228.6 X 177.8
9 X 7
165.68
228.6 X 190.5
9 X 7-1⁄2
133.17
228.6 X 203.2
9 X 8
99.30
254 X 127
10 X 5
360.36
254 X 152.4
10 X 6
311.27
254 X 177.8
10 X 7
253.77
254 X 203.2
10 X 8
186.45
254 X 228.6
10 X 9
109.96
266.7 X 215.9
10-1⁄2 X 8-1⁄2
196.83
279.4 X 203.2
11 X 8
283.70
304.8 X 152.4
12 X 6
514.94
304.8 X 203.2
12 X 8
390.11
330.16 X 279.4
13 X 11
248.75
355.6 X 203.2
14 X 8
630.45
381 X 254
15 X 10
602.23

Chemical Composition

Element Symbol Range % Nominal %
Tin Sn 4.0-6.0 4.4
Lead Pb 4.0-6.0 5.5
Zinc Zn 4.0-6.0 5.5
Nickel Ni 1.0 maximum
Iron Fe 0.30 maximum
Aluminium Al 0.005 maximum
Antimony Sb 0.25 maximum
Copper Cu Balance

Mechanical Properties

Mechanical Properties
Metric Values Imperial Values
Tensile Strength Min 248 N/mm² 36000 psi
Yield Strength Min 131 N/mm² 19000 psi
Elongation Min 15% 15%
Hardness Min 60 BHN 60 BHN

Comparative Specifications

BS1400 – LG2

AS1565 83600

SAE 40

JIS (Japan) H5121 – CAC402C (BC6)

DIN (Germany) 1705 – RG5

ISO 1338 – CuPb5Sn5Zn5

BS EN 1982 CuSn5Zn5Pb5

Machining Allowances

All Kormax LG2 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 4.560” to 4.575″ OD x 2.400” to 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.
Size Range OD Allowance ID Allowance
up to 3-3⁄4 +0.060″ to +0.075″ -0.060” to -0.100″
4” to 5” +0.060″ to +0.075″ -0.060” to -0.120″
5-1⁄4” to 6” +0.080″ to +0.112″ -0.088” to -0.183″
6-1⁄4” to 8” +0.094″ to +0.126″ -0.098” to -0.193″
Above 8″ +0.125″ to +0.196″ -0.125” to -0.272″

Resources

Data Sheet

LG2 Bronze Data Sheet

PDF (49 KB)

/wp-content/uploads/2022/11/Alloy-LG2-Leaded-Gunmetal-Material-Data-Sheet-Updated-6_10.pdf

Blog

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

Resource

Bronze Manufacturing Processes

PDF (702 KB)

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Related Products

SAE660 932 Leaded Bronze

SAE 660 / C93200 Leaded Bronze is a general purpose leaded tin bronze bearing and bushing material. It has excellent machining properties, good hardness, strength and wear resistance with excellent anti-frictional qualities. The alloy is not subject to dezincification and has reasonable corrosion resistance to sea water and brine making it suitable for pump and valve components. 932 is suitable for bearings having medium loads and speeds with adequate lubrications. SAE 660 has very similar components to LG2 bronze albeit with slightly different proportions. This means that both metals can be used interchangeably in most cases. The composition of 932 is strictly controlled as are the casting conditions. All Kormax 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.