C67300

C67300 manganese bronze is a robust alloy known for its exceptional strength and favorable bearing properties. This alloy retains a high level of impact resistance while also offering excellent machinability, making it particularly well-suited for a range of applications. These include but are not limited to clutch bearings, shaft bushings, sleeve bearings, thrust bearings, pump components, drive shafts, bearing pins, wear plates, gears, and cams.

CHEMICAL COMPOSITION
ElementsMin (%)Max (%)
Cu58.0063.00
Pb0.403.00
Si0.501.50
Mn2.003.50
Sn0.30
Fe0.50
Ni0.25
Al0.25
Total Others0.50
ZnRemainder
MECHANICAL PROPERTIES ACCORDING TO C67300 (AS PER TEMPER HO2)
Range (Inch) From To UTS Min (Ksi) PS Min (Ksi) ELo Min (Ksi) Hardness Min (HRB) Hardness Max
Round (Dia) 0.059 1.000 65 40 12 70
1.000 2.953 58 35 15 70
Hex (A/F) 0.118 1.000 65 40 12 70
1.000 2.756 58 35 15 70
Square (A/F) 0.118 2.362 60 30 20 70
Rectangle (Thickness) 0.118 1.968 60 30 20 70
Range (mm) From To UTS Min (Mpa) PS Min (Mpa) ELo Min (%) Hardness Min (HRB) Hardness Max
Round (Dia) 1.5 25 450 275 12 70
25 75 400 240 15 70
Hex (A/F) 3 25 450 275 12 70
25 70 400 240 15 70
Square (A/F) 3 60 415 205 20 70
Rectangle (Thickness) 3 50 415 205 20 70
PHYSICAL PROPERTIES
Melting Point – Liquidus°F1605
Density lb/cu in. at 68°F0.3
Specific Gravity8.3
Electrical Conductivity % IACS at 68°F22
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F55
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11
Modulus of Elasticity in Tension ksi17000
FABRICATION PROPERTIES
Technique Suitability
Machinability Rating70

C67300

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