When looking to buy a new brass instrument you will probably see products described as having a ‘gold brass bell’or a ‘red brass leadpipe’ but what difference does the brass alloy actually make? There is no doubt that the differences are subtle and for all but the most advanced players arguably irrelevant. You need to be a competent player that produces a good basic tone on your instrument for any difference to be noticeable. Putting that aside though,  if you are interested in in finding out a bit more (and I appreciate it’s not a particularly interesting topic!) then here’s some basic guidance.

Brass Alloys

Brass is used for manufacturing musical instruments as it is a malleable metal with excellent acoustic properties. It is primarily made up of Copper and Zinc and the proportions in which these are used affects the type of brass alloy produced. Generally, the softer the material the warmer and darker the sound produced; harder metal gives a brighter and more responsive sound. There are generally 3 main types of brass alloy used in musical instrument manufacture today.

Yellow Brass 

yellow brass alloyThe industry standard, if an instrument spec doesn’t specify then you can fairly confidently assume it’s yellow. A very resonant alloy (70% copper) which produces a bright and direct tone that ‘cuts through’, making it perfect for those trumpet fanfares.


Gold Brass 

gold brass alloyAs the name implies, gold brass has a slightly darker colour due to the higher copper content (85%) within the alloy. This gives the instrument a broader, fuller tone whilst still retaining a good level of projection.


Red Brass

red brass alloyAlso known as Rose brass, this has the highest copper content at around 90%. It gives a warmer and mellower tone but doesn’t project as well as alloys with higher zinc content as it is a softer metal. It is often used for the leadpipe (the main tube nearest to the mouthpiece) of student instruments as it helps to prevent ‘red rot’, a corrosion caused by the build up of acidic dirt / saliva inside the tubing.

Where is a different brass alloy used?

Manufacturers vary in their choice with some using the same brass alloy for an entire instrument and others changing it for certain components. The main place for a different type of brass to be used is typically the ‘bell’ section as this has by far the most influence on the overall sound produced. The leadpipe of an instrument also occasionally has a different brass from the main body of the instrument. You will sometimes see other components manufactured in different materials, sometimes nickel silver is used on trombone slide legs or tuning slides and there are even instruments with sterling silver bells. That’s for discussion on another day though!

Other Factors

There are many other factors that influence the sound of the instrument, from bore size and bell flair to the thickness of brass used. I hope this brief look at brass alloys though will help you understand that particular component of instrument manufacture.

About the author

Andy is a Director of Normans Musical Instruments and has worked within the business for over 20 years. During this time he has been involved in all areas from Sales and Marketing to Operations and Web Development so has experienced both Normans and the wider Musical Instrument industry from many aspects. Originally a Brass player, Andy has developed a good working knowledge of a wide range of instruments and is always keen to augment his understanding when an opportunity arises.




  • Kerry 19/07/2015 at 3:34 am

    When did rose brass come into significant use in the manufacture of trombones and french horns?

    • Diana Stone 20/07/2015 at 4:10 pm

      Hi Kerry,

      Thanks for leaving a comment. Rose brass has been used to manufacture trombones and french horns for decades, however, unfortunately, we do not have an exact date when this was introduced. If you do need any further help or advice, you can also contact our sales team on 01283 535333 option 1 or sales@normans.co.uk.

      Kind regards,


  • Muskaan 16/09/2015 at 6:00 am

    I didn’t know there are many types of brass in the first place. Very informative article I must say. Different types of brass with its content and impact of them on musical instruments is pretty much clear now.

  • NBM Metals 07/07/2016 at 9:55 am

    I must say that it is very informative article. Different types of brass impact of them on musical instruments is pretty much clear to now.

  • Sam Perkins 28/11/2016 at 8:17 pm

    I like how you started by pointing out that the differences to be discussed are subtle. People often get lost when they enter “Spec World” and lose sight of the bigger picture.