Inhibited Admiralty brass tubes (C44300) are tubes made of a copper-zinc alloy with a small addition of tin and a corrosion inhibitor, engineered for outstanding resistance to polluted or saline water. With over 70% copper content, they offer a strong combination of durability, thermal conductivity, and anti-corrosive performance in heat transfer systems, as detailed in our in-depth guide to admiralty brass applications.
Inhibited admiralty brass tubes are commonly used in steam condensers, especially those cooled with fresh, salt, or brackish water, and are trusted in industries such as power generation, oil refining, and marine engineering. The alloy withstands aggressive media, including sulfur-bearing compounds, and performs reliably under high-pressure and temperature conditions.
Applications
C44300 Admiralty brass tubes are commonly used in:
Steam condensers exposed to fresh, brackish, or seawater
Feedwater heaters in power generation plants
Heat exchangers in oil refineries and chemical plants
Cooling systems in marine and offshore environments
Desalination units and water treatment facilities
Thermal equipment operating under corrosive and polluted conditions
Key benefits
High corrosion resistance in contaminated water: inhibited alloy resists dezincification, pitting, and erosion in polluted and saline environments.
Reliable performance in aggressive media: withstands sulfur compounds and organic contaminants found in oil refining and chemical processing.
Thermal conductivity for efficient heat exchange: maintains stable performance across temperature cycles and varying water quality.
Good mechanical strength and ductility: suitable for high-pressure systems and thermal cycling.
Long service life in industrial environments: reduces maintenance needs in harsh conditions.
Compliance with global standards: manufactured to meet ASTM B111 and other relevant specifications.
Technical specifications
UNS no.
C44300 – BSI No. CZ111 ISO name CuZn28Sn1
Chemical comp. (%)
Cu 70 ~ 73 / Sn 0.9 ~ 1.2 / Pb 0.07 / Fe 0.06 max / Zn rem / As 0.02 ~ 0.06
ASTM spec.
B 111, B 395
ASME spec.
SB 111, SB 395
Applications
Heat exchangers, condensers, and cooling systems; desalination equipment.
Temper
O61 annealed
FAQ
What is admiralty brass?
Admiralty brass (C44300) is a copper-zinc-tin alloy with excellent corrosion resistance in seawater. It is commonly used in condenser and heat exchanger tubes in marine and industrial environments.
What is the difference between brass and admiralty brass?
While standard brass is primarily a copper-zinc alloy, admiralty brass includes a small amount of tin (usually 1%) to improve resistance to dezincification and corrosion in seawater applications.
What is admiralty brass used for?
Admiralty brass is used in marine condensers, heat exchangers, desalination plants, and other applications where corrosion resistance in brackish or seawater is critical.
about GNEE
why choose our products
Our company is equipped with advanced production lines capable of extruding, drawing, refining, and processing copper rods, copper tubes, copper busbars, and special-shaped copper products. To ensure every single product meets international standards, we have established a comprehensive quality control center. This center is furnished with a range of high-precision testing equipment, including spectrometers, metallurgical microscopes, universal material testing machines, and conductivity testers. This allows us to perform rigorous checks on raw materials, semi-finished, and finished products, covering chemical composition, physical properties, and non-destructive testing.
If you need any help, please contact us immediately:sales@gneesteel.com
Other product forms provided by GNEE
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Material |
Brass:C21000,C22000,C22600,C23000,C24000,C26000,C26130,C26800,C27000,C27200,C27400, C2800,H59,H62,H70,H65,H80,H90,CuZn30,CuZn37,CuZn35,CuZn40,etcLeaded |
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Diameter |
1/4",3/8",1/2", 5/8", 7/8" or customized |
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Thickness |
0.5/0.6/0.7/0.8/1 or Customized |
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Length |
15m/50ft or customized |
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Standard |
JIS,AISI,ASTM,GB,DIN,EN |
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Price Term |
x-Work,FOB,CNF,CFR,CIF,FCA,DDP,DDU,etc |
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Payment Term |
TT,L/C,Western Union,D/P,etc |
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Application |
refrigeration,installation of air conditioner,construction water and gas |
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Package |
Standard export package,suit for all kinds of transport,or as required. |
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Material |
Copper, Brass, Bronze and special copper alloy |
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Grade |
ASTM |
C10100,C11000,C12200,C21000,C22000,C23000,C24000,C26000, |
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G/B |
TU1,T2,TP2,H96,H90,H85,H80,H70,H65,H63,H62,H59,HPb63-3, |
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JIS |
C 1011,C 1100,C 1220,C3604,C 2100,C 2200,C 2300,C 2400, C 2600, |
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BS |
Cu-OFE,C 101,Cu-DHP,CZ 125,CZ 101,CZ 102,CZ 103,CZ 106,CZ 107, CZ 108,CZ 109,CZ 123,CZ 124, CZ 121,CZ 111,CZ 133, Pb 104, |
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DIN/ISO |
CuZn5,CuZn10,CuZn15,CuZn20,CuZn30,CuZn35,CuZn33,CuZn36, |
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Shape |
Round, Square, Flat, Hexagon, Oval, Half-round or Customized |
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Dimension |
Bar/Rod |
Standard(Diameter 5-160 mm) or Customized |
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Wire |
Standard(Diameter 0.02-6 mm) or Customized |
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Plate/Sheet |
Standard(T 0.2-50 mm/W 200-3000 mm/L 6000 mm) or Customized |
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Strip |
Standard(T 0.05-1.5 mm/W 20-600 mm/L 20000 mm) or Customized |
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Tube/Pipe |
Standard(OD 3-360mm/Wall thickness 0.5-50 mm) or Customized |
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Standard |
GB/T,JIS,ASTM, ISO, DIN, BS, NF etc. |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard. |
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Package |
Plastic film + Wooden case or as per customer requirement |
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Surface |
Polished,bright,oiled,hair line,brush,mirror,or as required |
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Deliver time |
According to order's quantity. |
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Shipment |
By sea, by air, DHL, UPS, FedEx etc. or as required |
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Application |
Electric light industry, machinery manufacturing, Building industry ,defense industry, and other fields Manufacturing industrial |
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Standard |
ASTM,DIN,BS,CDA,JIS,GB |
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Material |
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800, |
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Shape |
Square,Rectangular,etc. |
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Specifications |
Diameter:3~200mm |
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Length |
3m,5.8m, 6m, 11.8m, 12m, or as required. |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard,soft,etc |
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Surface |
mill,polished,bright,oiled,hair line,brush,mirror,sand blast,or as required. |
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Price term |
EXW, FOB, CFR, CIF, etc. |
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Payment term |
T/T |
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Package |
Export standard package: bundled wooden box, suit for all kinds of transport, |
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Delivery time |
According to order quantity |
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Export to |
Singapore,Indonesia,Ukraine,Korea,Thailand, Vietnam, Saudi Arabia, Brazil, Spain, |
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Application |
Copper plates are mainly used in electrical conductivity, heat conduction, and corrosion-resistant equipment. For instance, they are applied in wires, cables, conductive screws, blasting detonators, evaporators for chemical industries, storage containers, and various pipelines, etc. They can also be used as force-bearing parts for various deep drawing and bending manufacturing processes, such as pins, rivets, washers, nuts, conduits, pressure gauges, screens, and radiator parts, etc. |
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Contact |
If any requirement please feel free to inform me at any time. |
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Grade |
C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920, C10930,C11000,C11300,C11400,C11500,C11600,C12000,C12200,C12300, C12500,C14200,C14420,C14500,C14510,C14520,C14530,C17200,C19200, C21000,C23000,C26000,C27000,C27400,C28000,C33000,C33200,C37000, C44300,C44400,C44500,C60800,C63020,C65500,C68700,C70400,C70620, C71000,C71500,C71520,C71640,C72200,T1,T2,T3,etc |
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Standard |
JIS ASTM DIN EN ISO |
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Diameter |
0.3-5mm/custom |
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Length |
custom |
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Surface |
mill,polished,bright,mirror,hair line,brush,checkered,antique,sand blast,etc |
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Application |
Building, industry etc |
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Payment Terms |
T/T or L/C at sight |
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Delivery time |
5-15 days after receiving L/C or deposit |
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Remark |
Specific requirement of alloy grade,temper or specification can be discussed at your request |
