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Rulon Bearings

Tombasil, UNS C87500, Copper Casting Alloy
Categories: Metal; Nonferrous Metal; Copper Alloy; Copper Casting Alloy
Material Notes:

Casting methods recommended for this alloy: Centrifugal, Die, Investment, Permanent Mold, Plaster, and Sand.

Applications: Bearings, gears, impellers, rocker arms, valve stems, brush holders, bearing races, small boat propellers.

Classified under: Silicon bronzes and silicon brasses. ASTM B584; formerly ASTM B198-13B

Typical data for separately cast test bars. Alloy does not respond to heat treating. Casting shrinkage allowance is 1.9%
Key Words: Silicon Brass, ASTM B584; ASTM B198-13B
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Physical PropertiesMetricEnglishComments
Density 8.28 g/cc0.299 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 134134Sand cast
 163163Die cast
Hardness, Rockwell B 8383
Tensile Strength, Ultimate 460 MPa66700 psiSand cast
 585 MPa84800 psiDie cast
Tensile Strength, Yield  205 MPa
@Strain 0.5 %		29700 psi
@Strain 0.5 %		Sand cast
 310 MPa
@Strain 0.5 %		45000 psi
@Strain 0.5 %		Die cast
Elongation at Break 21 %21 %Sand cast, in 50 mm
 25 %25 %Die cast, in 50 mm
Creep Strength  9.50 MPa
@Temperature 290 °C		1380 psi
@Temperature 554 °F		for 0.00001%/h
 75.0 MPa
@Temperature 230 °C		10900 psi
@Temperature 446 °F		for 0.00001%/h
 195 MPa
@Temperature 175 °C		28300 psi
@Temperature 347 °F		for 0.00001%/h
Rupture Strength  20.0 MPa
@Temperature 290 °C,
Time 3.60e+8 sec		2900 psi
@Temperature 554 °F,
Time 100000 hour
 125 MPa
@Temperature 230 °C,
Time 3.60e+8 sec		18100 psi
@Temperature 446 °F,
Time 100000 hour
Modulus of Elasticity 106 GPa15400 ksiSand cast
 138 GPa20000 ksiDie cast
Compressive Strength 183 MPa26500 psiat permanent set of 0.1%
 515 MPa74700 psiat permanent set of 10%
Fatigue Strength  150 MPa
@# of Cycles 1.00e+8 		21800 psi
@# of Cycles 1.00e+8 		rotating beam
 150 MPa
@# of Cycles 5.00e+7 - 2.00e+8 		21800 psi
@# of Cycles 5.00e+7 - 2.00e+8
 170 MPa
@# of Cycles 6.00e+6 - 5.00e+7 		24700 psi
@# of Cycles 6.00e+6 - 5.00e+7
 205 MPa
@# of Cycles 600000 - 4.00e+6 		29700 psi
@# of Cycles 600000 - 4.00e+6
 240 MPa
@# of Cycles 100000 - 600000 		34800 psi
@# of Cycles 100000 - 600000
 275 MPa
@# of Cycles 60000 - 250000 		39900 psi
@# of Cycles 60000 - 250000
Machinability 50 %50 %UNS C36000 (free-cutting brass) = 100%
Charpy Impact 43.0 J31.7 ft-lbV-notch
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  0.0000284 ohm-cm
@Temperature 20.0 °C		0.0000284 ohm-cm
@Temperature 68.0 °F
 0.0000284 ohm-cm
@Temperature 15.0 °C		0.0000284 ohm-cm
@Temperature 59.0 °F
 0.0000287 ohm-cm
@Temperature 35.0 °C		0.0000287 ohm-cm
@Temperature 95.0 °F
 0.0000291 ohm-cm
@Temperature 60.0 °C		0.0000291 ohm-cm
@Temperature 140 °F
 0.0000294 ohm-cm
@Temperature 85.0 °C		0.0000294 ohm-cm
@Temperature 185 °F
 0.0000297 ohm-cm
@Temperature 120 °C		0.0000297 ohm-cm
@Temperature 248 °F
 0.0000302 ohm-cm
@Temperature 150 °C		0.0000302 ohm-cm
@Temperature 302 °F
 0.0000305 ohm-cm
@Temperature 175 °C		0.0000305 ohm-cm
@Temperature 347 °F
 0.0000310 ohm-cm
@Temperature 205 °C		0.0000310 ohm-cm
@Temperature 401 °F
 0.0000315 ohm-cm
@Temperature 230 °C		0.0000315 ohm-cm
@Temperature 446 °F
 0.0000318 ohm-cm
@Temperature 255 °C		0.0000318 ohm-cm
@Temperature 491 °F
 0.0000323 ohm-cm
@Temperature 285 °C		0.0000323 ohm-cm
@Temperature 545 °F
Magnetic Permeability 1.01.0
 
Thermal PropertiesMetricEnglishComments
CTE, linear  17.1 µm/m-°C
@Temperature 75.0 °C		9.50 µin/in-°F
@Temperature 167 °F
 17.5 µm/m-°C
@Temperature 105 °C		9.72 µin/in-°F
@Temperature 221 °F
 17.8 µm/m-°C
@Temperature 130 °C		9.89 µin/in-°F
@Temperature 266 °F
 18.3 µm/m-°C
@Temperature 160 °C		10.2 µin/in-°F
@Temperature 320 °F
 18.7 µm/m-°C
@Temperature 185 °C		10.4 µin/in-°F
@Temperature 365 °F
 18.9 µm/m-°C
@Temperature 210 °C		10.5 µin/in-°F
@Temperature 410 °F
 19.1 µm/m-°C
@Temperature 240 °C		10.6 µin/in-°F
@Temperature 464 °F
 19.5 µm/m-°C
@Temperature 270 °C		10.8 µin/in-°F
@Temperature 518 °F
 19.6 µm/m-°C
@Temperature 20.0 - 260 °C		10.9 µin/in-°F
@Temperature 68.0 - 500 °F
 19.7 µm/m-°C
@Temperature 295 °C		10.9 µin/in-°F
@Temperature 563 °F
 19.9 µm/m-°C
@Temperature 325 °C		11.1 µin/in-°F
@Temperature 617 °F
Specific Heat Capacity 0.375 J/g-°C0.0896 BTU/lb-°F
Thermal Conductivity  26.0 W/m-K
@Temperature 20.0 °C		180 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 27.0 W/m-K
@Temperature 35.0 °C		187 BTU-in/hr-ft²-°F
@Temperature 95.0 °F
 28.0 W/m-K
@Temperature 20.0 °C		194 BTU-in/hr-ft²-°F
@Temperature 68.0 °F
 29.0 W/m-K
@Temperature 70.0 °C		201 BTU-in/hr-ft²-°F
@Temperature 158 °F
 32.0 W/m-K
@Temperature 95.0 °C		222 BTU-in/hr-ft²-°F
@Temperature 203 °F
 34.0 W/m-K
@Temperature 120 °C		236 BTU-in/hr-ft²-°F
@Temperature 248 °F
 36.0 W/m-K
@Temperature 150 °C		250 BTU-in/hr-ft²-°F
@Temperature 302 °F
 38.0 W/m-K
@Temperature 175 °C		264 BTU-in/hr-ft²-°F
@Temperature 347 °F
 39.0 W/m-K
@Temperature 200 °C		271 BTU-in/hr-ft²-°F
@Temperature 392 °F
 42.0 W/m-K
@Temperature 230 °C		291 BTU-in/hr-ft²-°F
@Temperature 446 °F
 44.0 W/m-K
@Temperature 260 °C		305 BTU-in/hr-ft²-°F
@Temperature 500 °F
 46.0 W/m-K
@Temperature 290 °C		319 BTU-in/hr-ft²-°F
@Temperature 554 °F
Melting Point 821 - 917 °C1510 - 1680 °F
Solidus 821 °C1510 °F
Liquidus 917 °C1680 °F
Shrinkage 1.5 - 1.9 %1.5 - 1.9 %Patternmaker's Shrinkage
 
Processing PropertiesMetricEnglishComments
Annealing Temperature 260 °C500 °FStress-Relieving Temperature
Casting Temperature 955 - 980 °C1750 - 1800 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al <= 0.50 %<= 0.50 %
Copper, Cu <= 79 %<= 79 %
Lead, Pb <= 0.50 %<= 0.50 %
Silicon, Si 3.0 - 5.0 %3.0 - 5.0 %
Zinc, Zn 12 - 16 %12 - 16 %

References for this datasheet.

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MC87500b1 / 11921

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