Science, Tech, Math › Science Brass Alloy Additives Share Flipboard Email Print Kypros / Getty Images Science Chemistry Chemistry In Everyday Life Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Terence Bell University of British Columbia Carleton University Terence Bell wrote about commodities investing for The Balance, and has over 10 years experience in the rare earth and minor metal industries. our editorial process Twitter Twitter LinkedIn LinkedIn Terence Bell Updated June 25, 2019 Brass, a binary alloy containing copper and zinc, is made of various compositions depending upon the hardness, durability, machinability and corrosion resistance properties required by the end-user. Lead is the most common alloying agent used in brass because of its ability to make the alloy more machinable. Free machining brasses and free cutting brasses, such as C36000 and C38500, contain between 2.5% and 4.5% lead and have excellent hot forming properties. Eco Brass® (C87850 and C69300) is a lead-free alternative that uses silicon in replace of lead to increase machinability. Section brass contains a small amount of aluminum, giving it a bright golden color. The EU's 10, 20 and 50 cent coins are made of a section brass, known as "Nordic gold" that contain 5% aluminum. Arsenical brasses such as C26130, not surprisingly, contain arsenic. Small amounts of arsenic help to inhibit corrosion of the brass. Tin is also used to increase corrosion resistance in certain brasses (e.g. C43500), particularly to decrease the effect of dezincification. Manganese brass (C86300 and C675) can also be classified as a type of bronze and is a high strength alloy with good corrosion resistance and torsional properties. Nickel has a long history of being alloyed with brass, probably because it produces a brilliant silver, corrosion resistant metal. 'Nickel silver' (ASTM B122) as these alloys are normally referred, in fact, contain no silver, but are comprised of copper, zinc, and nickel. The British one pound coin is made from Nickel silver containing 70% copper, 24.5% zinc, and 5.5% nickel. Finally, iron can also be alloyed in small quantities to increase strength and hardness of brass. Sometimes referred to as Aich's metal - a type of gun metal - such brasses have been used in marine applications. The chart below summarizes common brass additives and the properties that they benefit. Common Brass Alloy Elements and Properties Improved Element Quantity Property Enhanced Lead 1-3% Machinability Manganese Aluminum Silicon Nickel Iron 0.75-2.5% Yield strength up to 500MN/m2 Aluminum Arsenic Tin 0.4-1.5% Corrosion resistance, especially in sea water Source: www.brass.org Cite this Article Format mla apa chicago Your Citation Bell, Terence. "Brass Alloy Additives." ThoughtCo, Oct. 29, 2020, thoughtco.com/brass-alloy-additives-2340107. Bell, Terence. (2020, October 29). Brass Alloy Additives. Retrieved from https://www.thoughtco.com/brass-alloy-additives-2340107 Bell, Terence. "Brass Alloy Additives." ThoughtCo. https://www.thoughtco.com/brass-alloy-additives-2340107 (accessed August 2, 2021). copy citation Composition of Common Brass Alloys Learn About the Different Brass Types Learn About the Properties and Uses of Brass Metal Brass Alloys and Their Applications What Is Brass? Composition and Properties 10 Copper Facts - Atomic Number 29 Symbol Cu Brass Alloys and Their Chemical Compositions The Properties and Uses of Zinc Metal Metal Alloys Explained Composition and Properties of Bronze Alloy Definition and Examples in Chemistry The Ancient History of Copper Copper Alloys List Interesting Facts About Metal Alloys A Basic Primer on Copper, the Red Metal Is Brass a Solution?