Back to Material Reference Guide

Brass is a copper-zinc alloy widely used in valve manufacturing due to its good corrosion resistance, machinability, and affordability. It is commonly found in low- to medium-pressure applications, especially in plumbing, water, and gas systems, but should be avoided in highly corrosive or high-temperature environments.

Properties

Properties

  • Good Corrosion Resistance – Resistant to freshwater, non-acidic chemicals, and mild atmospheric conditions.
  • Excellent Machinability – Easily cast, forged, and machined, making it cost-effective for valve production.
  • Moderate Strength & Ductility – Offers good mechanical properties for general-purpose applications.
  • Natural Antimicrobial Properties – Inhibits bacterial growth, making it suitable for potable water applications.
  • Cost-Effective – Cheaper than bronze and stainless steel for many low-pressure applications.

Brass vs. Other Valve Materials
• More affordable than bronze and stainless steel for water and gas applications
• Better corrosion resistance than carbon steel but less durable than stainless steel in harsh conditions
• Softer than bronze and steel, making it easier to machine but less wear resistant

Limitations

Limitations

  • Not Suitable for Strong Acids & Chlorides – Susceptible to dezincification (DZR) in aggressive water or acidic environments.
  • Limited High-Temperature Resistance – Softens and loses strength above 200°C (392°F).
  • Lower Strength Compared to Steel or Bronze – Not ideal for high-pressure or high-stress applications.

Common Applications

Common Applications

Plumbing & Potable Water Valves – Used in residential and commercial water systems.
Gas Valves – Found in propane, natural gas, and low-pressure gas control systems.
HVAC & Refrigeration Valves – Used in cooling systems, air conditioning, and heating systems.
Automotive & Fuel Valves – Used in fuel lines, oil, and coolant systems.
General Industrial Valves – Suitable for non-corrosive, low-pressure fluid control applications.