sb111 c44300 material Chemical Composition

UNS C44300 Admiralty Brass Tube PDF

ASTM B111 Copper Pipe PDF

Inhibited Admiralty Brass tubes – ASTM B111 C44300 – have high corrosion resistance, and primarily used for tubing of steam condensers cooled with fresh, salt, or brackish water. They are also used for heat exchangers in oil refineries, in which the corrosion from sulfur compounds and contaminated water may be very severe. For industrial processes, it is used for feed-water heaters and heat-exchanger equipment.

The chemical composition of C44300 tin brass includes elements such as copper, tin, nickel, iron, lead, and manganese. The copper content ranges from 69.0% to 71.0%, the tin content from 0.8% to 1.3%, the nickel content from 0.5%, the iron content from 0.10%, the lead content from 0.05%, the manganese content is negative, the zinc content is in the balance, and the content of other trace elements such as arsenic ranges from 0.03% to 0.06%. This material exhibits excellent mechanical properties, with a tensile strength σb (MPa) ≥ 410 and an elongation δ10 (%) ≥ 8, demonstrating good strength and ductility.

C44300 tin brass exhibits remarkable corrosion resistance, thanks to its trace arsenic content. Trace arsenic inhibits dezincification corrosion, further improving the alloy's corrosion resistance. Therefore, C44300 tin brass is particularly suitable for manufacturing heat exchangers and conduits in contact with corrosive liquids. Recent studies have also demonstrated that adding trace amounts of elements such as boron and nickel to C44300 can further improve the alloy's corrosion resistance.

C44300 tin brass exhibits excellent cold working properties, making it ideal for manufacturing condenser, evaporator, and heat exchanger tubes. However, it is important to note that C44300 tin brass is prone to stress corrosion cracking; therefore, cold-worked tubes must undergo low-temperature annealing to relieve stress. Furthermore, impurity content must be strictly controlled during hot pressing to avoid affecting the material's properties.

Marine Engineering: Ship condenser tubes, desalination pipelines, subsea valves.

Energy & Power: Thermal power plant condensers, nuclear cooling systems, refinery heat exchangers.

HVAC: AC refrigerant tubes, chlorinated hot water pipes.

Mechanical Parts: Deep-drawn pins/springs, corrosion-resistant bearing bushings.

Founded in 2008, we are a leading professional exporter specializing in a comprehensive range of high-quality copper products for global markets. Our core product portfolio encompasses various forms and specifications to meet diverse industrial needs.

Copper Tubes & Pipes:
We supply both Copper Seamless Tubes (ASTM B68, B75) and Copper Welded Tubes, including Pure Copper Tubes (C11000, C12200), Brass Tubes (C23000, C26000, C28000), and specialized Admiralty Brass Tubes (C44300) for superior corrosion resistance in heat exchanger applications. Our offerings comply with key ASTM standards such as ASTM B88 for seamless water tube and ASTM B111 for condenser tubes.

Copper Sheets & Plates:
Our range covers from thin-gauge Thin Copper Sheet (ASTM B152) to heavy-duty Thick Copper Plate, available in alloys like Pure Copper (C11000), Brass Sheet (C26000), Phosphor Bronze Sheet (C51000, C52100), and corrosion-resistant Admiralty Brass Sheet/Plate (C44300).

Copper Rods & Bars:
We provide Copper Round Rod, Copper Square Bar, Copper Hexagon Bar, and Copper Flat Bar in various tempers. Products include Free-Cutting Brass Rod (C36000 per ASTM B16), Oxygen-Free Copper Rod (C10100/C10200, ASTM B187), Beryllium Copper Bar (C17200, ASTM B196), and Admiralty Brass Rod (C44300).

Copper Wires & Strips:
Our Copper Wire products include Bare Copper Wire (ASTM B1/B2/B3), Enamelled Copper Wire, and Brass Wire. We also supply precision Copper Strip (C11000, C26800), Brass Strip, and Admiralty Brass Strip (C44300) for electrical, marine, and fabrication applications.