Maganese Bronze

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Manganese Bronze Alloys: High Strength Yellow Brass

C86200, C86300, C86500

The term “manganese bronze” which is used commercially to describe the high strength yellow brasses is somewhat misleading. Actually, they are not bronzes, nor does the amount of manganese they contain have any significant effect upon the structure of the alloys. The high-strength yellow brasses are basically alloys of copper and zinc to which varying amounts of other elements are added. These additions produce high strength combined with excellent corrosion resistance properties. The alloys are relatively easy to cast, but due to their solidification characteristics which lead to the formation of gross shrinkage concentration instead of dispersed shrinkage porosity, care must be exercised in gating and rising practice.

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Manganese Bronze

Typical Bronze & Brass Alloys Suitability for being joined by: Typical Mechanical Properties
CA# Ingot #
Previous Trade
Name
Alloy Name Nominal Composition ASTM Federal Former Federal Military Approx. Weight, lb./in.3 Soldering Brazing Castability (Ranked 1-8, 1 is the best or highest) Fluidity (Ranked 1-8, 1 is the best or highest)
Machinability Rating
(Free Cutting Brass = 100)
Tensile Strength, ksi Yield Strength, ksi Elongation, Percentage in 2 in. Shear Strength, ksi Fatigue Strength (100 million cycles), ksi Brinell Hardness (500-kg Load) *(3000-kg Load) Shrinkage Allowance Pattern Maker's Shrinkage
862 423 High Strength Yellow Brass Manganese Bronze 90,000 Tensile B30, B22, B271, B505, B584 QQ-C-523, QQ-C-390 QQ-B-726, QQ-C-390 MIL-C-11866, MIL-C-22229 0.288 Poor Poor 6 2 30 95 48 20 180 2%
863 424 High Strength Yellow Brass Manganese Bronze 110,000 Tensile B30, B22, B271, B505, B584 QQ-C-523, QQ-C-390 QQ-B-726, QQ-C-390 MIL-C-11866, MIL-C-15345, MIL-C-22087, MIL-C-22229 0.283 Poor Poor 6 2 8 119 83 18 25 225 2.30%
865 421 High Strength Yellow Brass Manganese Bronze 65,000 Tensile B30, B176, B271, B505, B584 QQ-C-523, QQ-C-390 QQ-B-726, QQ-C-390 MIL-C-15345, MIL-C-22087, MIL-C-22229 0.301 Fair Fair 6 2 26 71 28 30 20 100 1.90% 1.65% to 2.15%

Typical Bronze & Brass Alloys

CA# Ingot # Previous Trade Name Alloy Name Nominal Composition Applications
862 423 High Strength Yellow Brass Manganese Bronze 90,000 Tensile Marine castings, gears, gun mounts, bushings and bearings.
863 424 High Strength Yellow Brass Manganese Bronze 110,000 Tensile Extra-heavy duty, high strength alloy for gears, cams, bearings, screw-down nuts, bridge parts, hydraulic cylinder parts. (Not to be used in marine, ammonia or high corrosive atmospheres)
865 421 High Strength Yellow Brass Manganese Bronze 65,000 Tensile Propeller hubs, blades and other parts in contact with salt and fresh water, gears, liners.

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