Bronze 220 (UNS C22000) – Composition, Properties, & Uses

What is Bronze 220?

Bronze 220 is a copper-based alloy composed of copper, lead, zinc, and tin. This alloy is known for its mechanical stability, strength, and resistance to corrosion. In this blog post, we will explore the physical, chemical, mechanical, and mechanical properties of Bronze 220 and its various applications. We will also discuss ensuring the best corrosion resistance and heat treatment when working with this alloy.

What Forms is Bronze 220 Available at Piping Mart?

• Bronze 220 Pipes
• Bronze 220 Tube
• Bronze 220 Foils
• Bronze 220 coils
• Bronze 220 Sheets
• Bronze 220 Plates
• Bronze 220 Forged Fittings
• Bronze 220 Bars
• Bronze 220 Nuts
• Bronze 220 Bolts
• Bronze 220 Valves
• Bronze 220 Washers
• Bronze 220 Flanges

Brass 220 Chemical Composition

The main elements present in UNS C22000 are copper (Cu), lead (Pb), zinc(Zn), and tin (Sn). The chemical composition of this alloy includes 67% copper, 28% zinc, 5% lead, 0.25% tin, and other trace elements such as iron (Fe), manganese (Mn), nickel (Ni), sulfur (S) and phosphorus(P). These elements combine to create an alloy highly resistant to corrosion from most acids and alkalis at room temperature.

Bronze UNS C22000 Physical Properties

Bronze 220 has a melting temperature of 930°C (1706°F) and a density of 8.8 g/cm3. It is classified as an alpha-beta brass because it contains both alpha (α) and beta (β) phases in its microstructure. The hardness range is between 70 to 95 Brinell (HBW), with a tensile strength of 600 MPa (87 ksi). It exhibits good wear resistance thanks to its high lead content, making it an ideal material for bearings and bushings.

Bronze UNS C22000 Mechanical Properties

The mechanical properties of 220 Bronze include a high level of strength due to its combination of metals, which helps increase the material’s ductility. It also has excellent thermal stability, making it suitable for high-temperature applications such as gas turbines or boilers where temperatures can reach up to 450°C (842°F). Additionally, this material has good machinability, allowing easy shaping during production processes like forging or casting.

Bronze 220 Equivalent

• UNS C22000
• ASTM B130
• ASTM B372
• MIL B-20292
• MIL C-3383
• QQ W321
• SAE J461

Bronze 220 Specifications

Product	Specification
Bands, Projectile Rotating	MILITARY MIL-B-20292, MIL-B-18907
Bronze 220 Bar	ASTM B36
	SAE J461, J463
Bronze 220 Cups, Bronze 220 Bullet, Bronze 220, Jacket	ASTM B131
	MILITARY MIL-C-3383
Bronze 220 Plate	ASTM B36
Bronze 220 Sheet	ASTM B36, B694
	SAE J463, J461
Bronze 220 Strip	ASTM B694, B36, B130
	SAE J461, J463
Bronze 220 Tube	ASTM B135
	SAE J461, J463
Bronze 220 Tube, Bronze 220 Rectangular Waveguide	ASTM B372
	MILITARY MIL-W-85
Bronze 220 Tube, Bronze 220 Welded	ASTM B587

Bronze 220 Applications & Corrosion Resistance

Bronze C220 has many possible applications due to its strong physical properties, such as resistance to corrosion from most acids and alkalis and excellent thermal stability, allowing it to be used in high-temperature applications like gas turbines or boilers without compromising its quality or integrity over time. Common uses include valve stems, lock bodies, piston rings, bearings, bushings, and electrical fittings. To ensure maximum corrosion resistance when using Bronze 220, it should be heat treated before application to maximize the beneficial effects of the alloy’s chemical composition, including increased hardness and improved tensile strength.

Bronze C220 Machining

220 Bronze machining creates parts from bronze material through cutting, drilling, grinding and other operations. This type of machining requires understanding metal properties to use the correct tools and strategies to create complex shapes and designs. C22000 requires precise planning, accuracy in measurements, and skilful handing that helps produce aesthetically pleasing components with great strength. With this knowledge, machinists can produce high-quality parts without sacrificing precision or speed while keeping production costs low.

Bronze 220 Weldability

220 Bronze  is an aluminium bronze alloy known for its weldability and excellent resistance to corrosion. The alloy is composed primarily of copper, aluminium, and iron with trace amounts of manganese, nickel, and silicon. Alloy 220 has a low melt temperature allows it to be easily joined by welding processes such as gas metal arc welding (GMAW). Bronze 220 provides high strength even in harsh environments due to its high corrosion resistance. Heat treatment processes like quenching or tempering can also further improve its strength. Bronze 220 is ideal for projects requiring strong weldable materials in corrosive applications.

Conclusion:

Overall, Bronze material is an excellent choice for many applications thanks to its durability and ability to resist corrosion from most acids at room temperature and good thermal stability, allowing it to be used in high-temperature applications without compromising quality or integrity over time. Its combination of physical properties makes it perfect for valve stems, lock bodies, piston rings, bearings, bushings, and electrical fittings. To ensure maximum corrosion resistance when using bronze220, heat treatment should be applied before application to maximize the beneficial effects of the alloy’s chemical composition, including increased hardness and improved tensile strength.