ThePipingMart Blog Grades UNS C67400 Manganese Bronze – Composition, Properties And Uses

UNS C67400 Manganese Bronze – Composition, Properties And Uses

UNS C67400 Manganese Bronze

Have you ever heard of c67400 manganese bronze? If you haven’t, you’re in the right place. This unique alloy has many beneficial properties, making it stand out from other bronzes. This blog post will cover everything you need about c67400 manganese bronze, from its composition and physical properties to its uses and corrosion resistance.

UNS C67400 Manganese Bronze Composition

C67400 manganese bronze is a type of brass alloy with high amounts of copper, zinc, and manganese. Specifically, it consists of 60% copper, 38% zinc, and 2% manganese. This unique composition gives c67400 distinctive bronze properties like strength, durability and excellent wear and corrosion resistance.

Element Content (%)
Cu 58.5
Zn 36.5
Al 1.2
Mn 2.8
Sn 1

UNS C67400 Manganese Bronze Physical Properties

C67400 bronze is reddish-gold and attractive, commonly used in decorative applications. It has a density of 8.47 grams per cubic centimetre, a melting point of 954-1010°C and a thermal conductivity of 44.2 W/(m·K). Also, it has a low coefficient of friction, excellent machinability, and is highly resistant to fatigue.

Properties Metric Imperial
Density 8.63 g/cm3 0.312 lb/in³
Melting point 866°C 1590°F

UNS C67400 Manganese Bronze Mechanical Properties

This bronze alloy is known for its outstanding mechanical properties, as it is hard-wearing and durable. It has an ultimate tensile strength of 700-850 MPa and a yield strength of 300 MPa. The elongation is 12% and 5-12% in 50mm and 75mm or two in. and 3 in, respectively. Also, it is resistant to impact and abrasion. It wears and tears, making it an ideal material for applications like gears, marine hardware, and bushings and applications involving heavy loads.

Properties Metric Imperial
Tensile strength 483-634 MPa 70100-92000 psi
Yield strength (depending on temper) 234-379 MPa 33900-55000 psi
Elongation at break 28% 28%
Machinability (UNS C36000 (free-cutting brass) = 100) 25 25
Poisson’s ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

UNS C67400 Manganese Bronze Equivalent

  • SAE J461
  • SAE J463

UNS C67400 Manganese Bronze Uses

Due to its unique characteristics, c67400 bronze is used for various applications. One of the most common uses of c67400 bronze is in constructing marine fittings and hardware, including propellers, underwater fasteners, propulsion parts, and hardware for boats, ships, and offshore structures. This type of bronze is also used in automotive, electrical, and construction industries, as it is highly malleable and easy to work with due to its good workability.

UNS C67400 Manganese Bronze Hardness

C67400 bronze alloy has excellent hardness properties, with a Brinell hardness of 175. This makes it a preferred material for applications requiring high wear, corrosion, and fatigue resistance, such as valve parts, fasteners, and bushings.

UNS C67400 Manganese Bronze Heat Treatment

C67400 bronze doesn’t require any heat treatment, and it can be machined, fabricated and formed even without annealing. As a result, it reduces production time and costs associated with heat treatment that other bronzes and alloys require.

UNS C67400 Manganese Bronze Welding

C67400 bronze can be welded using common methods such as oxyacetylene, gas tungsten arc, and gas metal arc welding. Still, phosphorous-free filler rods are recommended to minimize the chances of cracking or porosity.

UNS C67400 Manganese Bronze Corrosion Resistance

C67400 bronze has high corrosion resistance in freshwater and seawater environments, making it an ideal material for marine hardware. It also exhibits

excellent resistance to stress corrosion and is resistant to crevice corrosion and dezincification, making it a preferred material for applications in plumbing and valve systems.


In conclusion, c67400 manganese bronze is a versatile alloy with many excellent properties, including high mechanical strength, corrosion resistance, and wear and fatigue resistance. It is ideal for use in marine and industrial applications. Its unique copper, zinc, and manganese composition makes it a valuable metal with outstanding properties. So next time you come across this bronze alloy, you’ll know what makes it stand out!

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