C67400

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 (%)
Cu 57.00 60.00
Pb 0.30 1.20
Si - 1.00
Mn 1.50 2.50
Sn - 0.50
Fe - 0.50
Al 1.50 2.30
Total Others - 0.50
Zn Remainder

Mechanical Properties According To SAE J463 C67400 (As Per Temper HO2)

Range (MM) From To UTS Min (Mpa) PS Min (Mpa) ELo Min (%) Hardness Min (HRB) Hardness Max (HRB)
Round (Dia) 8756303708170210
Hex (A/F) 8 70 630 370 8 170 210
Square 8 60 630 370 8 170 210
Rectangle (Thickness) 8 50 630 370 8 170 210
PHYSICAL PROPERTIES
Melting Point - Liquidus°F1625
Melting Point - Solidus°F1590
Density lb/cu in. at 68°F0.292
Specific Gravity8.08
Electrical Conductivity % IACS at 68°F23
Thermal Conductivity Btu/ sq ft/ ft hr/ °F at 68°F58
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11
Specific Heat Capacity Btu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tension ksi16000
Modulus of Rigidity ksi6000
FABRICATION PROPERTIES
Technique Suitability
SolderingFair
BrazingGood
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingFair
Coated Metal Arc WeldingNot Recommended
Spot WeldGood
Seam WeldGood
Butt WeldGood
Capacity for Being Cold WorkedPoor
Capacity for Being Hot FormedExcellent
Forgeability Rating100
Machinability Rating30

TYPICAL USES

  • Oil and gas Industries
  • Aerospace
  • Fastener
  • Marine