Selecting Your Alloy
Selecting the proper material is crucial to successful design of new bearings. Factors of the application such as load speeds and temperature must be known for proper alloy selection.
Bronze is normally used as the base material for Spadone Alfa bearings. The chart below lists a few of the common bearing alloys used in bearing applications. Each alloy is listed with its specific properties. These properties should only be used as a guide when designing a bearing for your application.
Bronze alloys may not suitable for all applications. Especially those that involve environmental concerns, extreme temperature fluctuations and loads that exceed the compressive strengths of bronze. Other materials with suitable properties can be selected. These would include cast iron, tool steels, stainless steel and other materials that have provided excellent operating results.
We recommend that you review the details of your application with our staff.
Spadone-Alpha SLP LLC., P.O. Box 411, Westport, CT 06881
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Approximate Composition | Compressive Strength (.001 set 1,000 psi) | Tensile Strength (1,000 psi min) | Yield Strength (1,000 psi Min) | % Elongation In Inch (min) | Brinell Hardness | Application |
M-GP#7 (Copper 83%, Lead 7%, Tin 7%, Zinc 3 %, Leaded Tin Bronze) | 13-14 | 30 | 14 | 15 | 65 (500 kg) | Used for Medium load & temperature applications. General utility alloy. Conforms to ASTM B-271, B-505,B-584, SAE 660 |
M-GP#5 (Copper 80%, Lead 10%, Tin 10%) | 13 | 30 | 12 | 15 | 60 (500 kg) | Widely used bearing alloy. Good anti-friction & wear properties. Medium loads & temperature. Good resistance to mild acids & paper mill sulfite liquor. Conforms to SAE 64 - ASTM-B-22-C, B-271 B-584 |
M-G#20 (Copper 88%, Tin 10%, Zinc 2%) | 15 | 40 | 18 | 20 | 70 (500 kg) | Heavy duty alloy. Excellent for heavy loads and shock conditions. Exhibits high resistance to corrosion. Similar to ASTM B-22-D, B584, B 271 or SAE 62. |
M-HD#8 (Copper 83%, Aluminum 11%, Nickel 2%, Iron 4%) | 22 | 75 | 30 | 12 | 225 (3000 kg) | Most widely used alloy for one piece Bridge bushings & Plates. For slow speeds & extreme loads ranging from 3,500 (running) to 8,000 (static) psi. Conforms to ASTM B-584, SAE 430B, ASTM B22 Alloy. |
B-110 (Copper 65%, Aluminum 6%, Iron 3%, Zinc 22%, Manganese 4%) | Double click to edit cell | Double click to edit cell | Double click to edit cell | Double click to edit cell | Double click to edit cell | Double click to edit cell |
