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C90300 (SAE 620)
Bronze Bars
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C90300 (SAE 620)
Bronze Bars
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C90300 is a “GREEN” non-leaded alloy
Tin Bronze – Navy G QQC-390B Type II and Type III
CDA 903 SAE 620 88-8-0-4 ASTM B505
Bunting continuous cast bronze bars of C90300 give superior quality and performance. Continuous casting achieves a high density grain structure, free of porosity, resulting in a reduction of tool wear and component rejects.
Solid bars are stocked 13" increments and 105" lengths, and are available in other lengths and nonstandard sizes. Consider bars for use when you need special bearings, bearings for prototypes, or for emergency repairs.
Typical Properties:
(Not to be used for specification purposes.)
Copper: 86.00 – 89.00%
Tin: 7.50 – 9.00%
Lead: 0.30% max.
Zinc: 3.00 – 5.00%
Physical Properties: Continuous Cast
Tensile Strength PSI: 44,000 min
Yield Strength PSI: 22,000 min.
Elongation: 18% min.
Brinell Hardness (500 kg load): 70 typical
Machinability Rating: 30
Minimum Operating Temperature: -450°F
Maximum Operating Temperature: 550°F
C90300 is used for bearings, seal rings, gears, piston rings, pump impellers, steam fittings, and valve components. C90300 has good wear resistance but should be used with hardened steel shafts (300-400 HB). Due to the lack of lead, this material requires constant lubrication, generally grease.
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Results 1 - 12 of 12
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Item #
Nominal Size I.D.
Nominal Size O.D.
O.D. Min
O.D. Max
B903S000008
SOLID
1
in
1.0310
in
1.0410
in
B903S000012
SOLID
1 1/2
in
1.5310
in
1.5410
in
B903S000016
SOLID
2
in
2.0340
in
2.0440
in
B903S000020
SOLID
2 1/2
in
2.5340
in
2.5440
in
B903S000024
SOLID
3
in
3.0340
in
3.0440
in
B903S000028
SOLID
3 1/2
in
3.5340
in
3.5440
in
B903S000032
SOLID
4
in
4.0550
in
4.0710
in
B903S000036
SOLID
4 1/2
in
4.5550
in
4.5710
in
B903S000040
SOLID
5
in
5.0550
in
5.0710
in
B903S000048
SOLID
6
in
6.0780
in
6.1100
in
B903S000064
SOLID
8
in
8.0780
in
8.1100
in
B903S000080
SOLID
10
in
10.0780
in
10.1340
in
Results 1 - 12 of 12
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