6912 FMN1

DESCRIPTION

Manganese bronze contains small additions of manganese, iron, and aluminium, plus lead for lubricity, anti-seizing, and bonding. Like the aluminium bronzes, they combine high strength with excellent corrosion resistance. Manganese bronze bearings can operate at high speeds under heavy loads, but require high shaft hardness and nonabrasive operating conditions

CHEMICAL COMPOSITION

Elements Min (%) Max (%)
Cu56.5060.00
Pb1.001.50
Fe-0.30
Mn0.501.20
Total Others-0.75
Zn Remainder

Mechanical Properties According To 6912 FHTB2 (As Per Temper HB)

Range (mm) From To UTS Min (MPa) PS Min Elongation Min (%) Hardness Min Hardness Max
Round (Dia)1.575395-20--
Hex (A/F)370395-20--
Square (A/F)360395-20--
Rectangle (Thickness)350395-20--
Physical Properties Metric English
Density8.40 g/cc0.303 lb/in3
CTE, linear26.0 ᶙm/m-˚C14.4 ᶙin/in-˚F
Specific Heat Capacity0.380 J/g-˚C0.0908 BTU/lb-˚F
Thermal Conductivity113 W/m-K784 BTU-in/hr-ft²-˚F
Melting Point880-900 ˚C1620 – 1650 ˚F
Solidus880 ˚C1620 ˚F
Liquidus900 ˚C1650˚F
FABRICATION PROPERTIES
Machinability (CuZn39Pb3 = 100 %)80.00%
Capacity for Being Cold WorkedPoor
Capacity for Being Hot WorkedEquivalent Alloy

TYPICAL USES