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Gunmetal, also known as red brass is a type of Bronze an alloy of Copper, Lead, Tin and Zinc along with specified percentage of Nickel.The principal uses of this alloy are for valve bodies, pump bodies, elbows, pipes, taps and cocks and other hydraulic fittings where pressure tight properties are important. Its corrosion resistance properties rate fairly high and it also finds application in low-stressed bearings and moving parts.
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | Al | Si | Sb | Impurities |
LTB-1 | Rem. | 6-8 | 2.5-3.5 | 1.5-3.0 | 0.3 | 2 | 0.01 | 0.01 | 0.3 | 0.7 |
LTB-2
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | Al | Si | Sb | Impurities |
LTB-2 | Rem. | 4-6 | 4-6 | 4-6 | 0.35 | 2 | 0.01 | 0.02 | 0.4 | 0.8 |
LG-1
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb | S | Bi | Impurities |
LG-1 | Rem. | 2.0-3.5 | 4-6 | 7.0-9.5 | 0.5 | 2 | 0.03 | 0.01 | 0.02 | 0.25 | 0.08 | 0.1 | 1 |
LG-2
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | Al | Si | Sb | Bi | Impurities |
LG-2 | Rem. | 4-6 | 4-6 | 4-6 | 0.5 | 2 | 0.01 | 0.02 | 0.05 | 0.8 |
LG-4
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | Al | Si | Sb | Bi | Impurities |
LG-4 | Rem. | 6.0-8.05 | 2.5-3.5 | 1.5-3.0 | 0.2 | 2 | 0.01 | 0.01 | 0.25 | 0.05 | 0.7 |
RG-5
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
RG-5 | 84-86 | 4-6 | 4-6 | 4-6 | 0.2 | 2 | 0.03 | 0.01 | 0.1 | 0.01 | 0.05 | 0.06 |
RG-7
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
RG-7 | 83-85 | 6.8-8.0 | 5.3-7.0 | 3.3-5.0 | 0.2 | 1.0-1.5 | 0.03 | 0.01 | 0.1 | 0.01 | 0.25 | 0.03 |
BC-1
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb |
BC-1 | 79-83 | 2 - 4 | 3-7 | 8-12 | 0.35 | 1 | 0.05 | 0.01 | 0.01 | 0.2 |
BC-2
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb |
BC-2 | 86-90 | 7 - 9 | 0-1 | 3-5 | 0.2 | 1 | 0.05 | 0.01 | 0.01 | 0.2 |
BC-6
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb |
BC-6 | 83 - 87 | 4 - 6 | 4-6 | 4-6 | 0.3 | 1 | 0.05 | 0.01 | 0.01 | 0.2 |
BC-7
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb |
BC-7 | 86-90 | 5 - 7 | 1-3 | 3-5 | 0.2 | 1 | 0.05 | 0.01 | 0.01 | 0.2 |
C83600
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb | S |
C83600 | 84 - 86 | 4.3 - 6.0 | 4.0 - 5.7 | 4.3 - 6.0 | 0.25 | 1 | 0.05 | 0.005 | 0.005 | 0.25 | 0.08 |
C84400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb | S |
C84400 | 79 - 82 | 2.5-3.5 | 6-8 | 7-10 | 0.4 | 0.8 | 0.02 | 0.005 | 0.005 | 0.25 | 0.08 |
C54400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Si | Sb | S |
C54400 | Rem | 3.5-4.5 | 3.5-4.5 | 1.5-4.5 | 0.1 | - | 0.01-0.50 | - | - | - | - |
Silicon bronze is a low-lead brass alloy that is generally composed of 96 percent copper. The remainder can be made from silicon and a variety of other alloys such as manganese, tin, iron, or zinc. Silicon Bronze is known for its easy pouring ability, appealing surface finish and superior corrosion resistant properties, even when submerged in liquids and chemicals. Silicon Bronze was originally developed for the chemical industry but later expanded due to its good casting characteristics.Silicon Bronze is used for wires (telephone and telegraph), bearings, valves, castings, and construction equipment.
Standard: ASTM
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-63400 | Rem | 0.2 | 0.05 | 0.5 | 0.15 | 0.15 | - | 2.6-3.2 | - | 0.25-0.45 | - | - |
C-63600
Standard: BS 1400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-63600 | Rem | 0.2 | 0.05 | 0.5 | 0.15 | 0.15 | - | 3-4 | - | 0.7-1.3 | - | - |
C-63800
Standard: BS 1400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-63800 | Rem | - | 0.05 | 0.8 | 0.2 | 0.2 | - | 2.5-3.1 | 0.1 | 1.5-2.1 | - | - |
C-64200
Standard: ASTM
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-64200 | Rem | 0.2 | 0.05 | 0.5 | 0.30 | 0.25 | - | 6.3-7.6 | 0.1 | 1.5-2.2 | - | - |
C-64210
Standard: ASTM
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-64210 | Rem | 0.2 | 0.05 | 0.5 | 0.30 | 0.25 | - | 6.3-7.0 | 0.1 | 1.5-2.0 | - | - |
C-87300
Standard: ASTM
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-87300 | 94 Min | - | 0.20 | 0.25 | 0.20 | - | - | - | 0.8-1.5 | 3.5-4.5 | - | - |
C-95600
Standard: ASTM
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | S |
C-95600 | 88 Min | - | - | - | - | 0.25 | - | 6-8 | - | 1.8-3.2 | - | - |
Silicon brass are part of the subgroup of high strength brasses. These materials contain less than 20% zinc and less than 6% silicon. The silicon brasses are solid solution strengthened. These silicon brasses are typically chosen because of their high strength and moderately high corrosion resistance. The conductivity of the silicon brasses is much less than that of unalloyed copper. The silicon red brasses are used for valve stems where corrosion and high strength are critical. The wrought silicon red brasses are designated as UNS C69400 through C69710. Included in this category are the silicon red bronzes. These alloys are similar to the silicon red brasses except they contain very low concentrations of zinc. The silicon red bronze alloys are designated UNS C47000 through C66100. The cast silicon red brasses are C87300 to C87900. Silicon brass castings exhibit moderate strength and very good aqueous and atmospheric corrosion resistance. They are used in applications such as bearings, gears, and intricately shaped pump and valve components.
Standard: ASTM B371
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-69400 | 80-83 | - | 0.30 | Rem | 0.2 | - | - | - | - | 3.5-4.5 | 0.30 | - |
C-69700
Standard: ASTM B371
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-69700 | 75-80 | - | 0.5-1.5 | Rem | 0.2 | - | - | - | 0.4 | 2.5-3.5 | - | - |
C-69710
Standard: ASTM B371
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-69710 | 75-80 | - | 0.5-1.5 | Rem | 0.2 | - | - | - | 0.4 | 2.5-3.5 | - | - |
C-87500
Standard: ASTM B584
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-87500 | 79 Min | - | 0.50 | 12-16 | - | - | - | 0.50 | - | 3-5 | - | - |
C-87800
Standard: ASTM B176
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-87800 | 8o Min | 0.25 | 0.15 | 12-16 | 0.15 | 0.20 | 0.01 | 0.15 | 0.15 | 3.8-4.2 | 0.05 | 0.50 |
C-87850
Standard: ASTM B176
Copper Alloys | Cu | Sn | Pb | Zn | Fe | Ni | P | Al | Mn | Si | Sb | s |
C-87850 | 74-78 | 0.30 | 0.10 | Rem | 0.10 | 0.20 | 0.05-0.2 | - | 0.1 | 2.7-3.4 | 0.1 | - |
CW721R / CZ114 is a high tensile brass consisting of a duplex structure. Developed for more exacting applications where strength and corrosion resistance are required. Also referred to as a manganese bronze the CW721R / CZ114 has additions of aluminium, iron, tin and manganese that are added to the basic 60/40 brass matrix, creating a variety of properties to benefit the designer.The aluminium and tin content gives the CW721R / CZ114 a brighter finish and is the main reason for the increase in corrosion resistance. The iron and manganese additions also improve the strength level, with the iron also acting a grain refiner. Some of the other benefits of the CW721R / CZ114 grade are a very good hot working capacity to allow for hot stamping and a good machinability rating.
Standard: BS 1400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | P | Al | Mn | Si | Impurities |
HTB-1 | 55 Min | 1 | 0.50 | Rem | 0.7-2 | 1 | 0.5-2.5 | 0.1-3 | 0.1 | 0.20 |
HTB-2
Standard: 304-1981
Copper Alloys | Cu | Sn | Pb | Zn | Fe | P | Al | Mn | Si | Impurities |
HTB-2 | 55 Min | 0.2 | 0.20 | Rem | 1.5-3.25 | 1 | 3-6 | 1.5-4.0 | 0.1 | 0.20 |
HTB-3
Standard: BS 1400
Copper Alloys | Cu | Sn | Pb | Zn | Fe | P | Al | Mn | Si | Impurities |
HTB-3 | 55 Min | 1 | 0.50 | Rem | 0.7-2.0 | 1 | 0.5-2.5 | 0.1-3.0 | 0.1 | 0.20 |
Aluminium bronze is a type of bronze in which aluminium is the main alloying metal added to copper, in contrast to standard bronze (copper and tin) or brass (copper and zinc) . A variety of aluminium bronzes of differing compositions have found industrial use, with most ranging from 5% to 11% aluminium by weight, the remaining mass being copper; other alloying agents such as iron, nickel, manganese, and silicon are also sometimes added to aluminium bronzes. Aluminium bronzes are most commonly used in applications where their resistance to corrosion makes them preferable to other engineering materials. These applications include plain bearings and landing gear components on aircraft, Ernie Ball Aluminum Bronze strings, engine components (especially for seagoing ships), underwater fastenings in naval architecture, and ship propellers.