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Manganese Bronze 675 / C675 / C67500

ASTM B124, ASTM B138, QQ-C-728, SAE J461, SAE J463, UNS C67500

Level 4
Level 3
Oxyacetylene Welding
Level 2
Seam Weld
Level 1
Coated Metal Arc Welding

Farmers Copper Ltd. sustains a broad inventory of Manganese Bronze C67500 in rod form. C675 possesses good torsional properties and general corrosion resistance. Manganese bronze withstands exposure to dry gases, dilute alkalies, sulfides, and most organic solvents and acids. Though C675 has common resistance, contact with ammonia, mercury, and most chlorine gas should be avoided.

Manganese Bronze C675 Round Bar Shapes

C67500 Manganese Bronze Sizing

  • Round Bar (2” dia to 6” )

Manganese Bronze C675 Round Bar Applications

  • Shafting
  • Pump rods
  • Valve parts
  • Aircraft parts
  • Automotive
  • Industrial
  • Marine


Farmer’s Copper Ltd. extends its services throughout many industries. We provide the raw copper alloy materials in various standard shapes as well as custom cut copper alloys.

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Our C67500 Manganese Bronze Inventory & Properties

Farmer’s diverse inventory of products and services offered provides our customers the largest and most extensive selection of alloys available, cut to precise specifications, and delivered with total quality control.

Chemical Properties

Cu(1,2)Pb SnZnFeAlMn
Min (%)57.00.500.80.05
Max (%)

Physical Properties

Melting Point - Liquidus°F1630
Melting Point - Solidus°F1590
Densitylb/cu in. at 68°F0.302
Specific Gravity8.36
Electrical Conductivity% IACS at 68°F 24
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F61
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F) 11.8
Specific Heat CapacityBtu/ lb /°F at 68°F0.09
Modulus of Elasticity in Tensionksi 15000
Modulus of Rigidityksi 5600

Fabrication Properties

Oxyacetylene WeldingGood
Gas Shielded Arc Welding Fair
Coated Metal Arc WeldingNot Recommended
Spot WeldGood
Seam WeldFair
Butt WeldGood
Capacity for Being Cold WorkedPoor
Capacity for Being Hot FormedExcellent
Forgeability Rating80
Machinability Rating30

Mechanical Properties

Form TemperTemper CodeTensile Strength (ksi)YS-0.5% Ext (ksi)Elongation (%)Rockwell B scaleShear Strength (ksi)Section Size (in)Cold Work (%)
1/2 Hard H02 84 Typ60 Typ19 Typ90 Typ48 Typ120
Rod1/4 HardH0172 Typ 42 Typ 27 Typ77 Typ44 Typ220
H0177 Typ45 Typ 23 Typ83 Typ47 Typ110
Soft Anneal O6065 Typ 30 Typ 33 Typ65 Typ42 Typ1

Our Commitment to Service

As a leading copper, brass, & bronze alloys supplier, Farmers Copper Ltd. attributes our success to serving our customers, through our service-minded employees and material readily available for prompt, accurate deliveries of copper, brass, bronze, stainless steel and other metal alloys.

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