Choosing a brass grade: 63/37, 70/30, 60/40 and naval brass
Brass is a copper-zinc alloy, and small changes in the zinc content change how the metal forms, machines and looks. Here is how the common grades we supply are normally used.
Common brass grades and where they are used
- Brass 90/10 (Cu-Zn-10): electrical and electronic components, connectors and contact parts, switches.
- Brass 85/15 (Cu-Zn-15): jewellery and metal goods, cladding panels, condenser tubes, heat exchangers, eyelets and fasteners.
- Brass 70/30 (Cu-Zn-30): terminals, wiring harnesses, connectors, cartridge caps and radiator tubes.
- Brass 63/37 (Cu-Zn-37): lamp caps, switches, MCBs, radiator tubes, electrical contacts, torch bodies and zippers.
- Brass 60/40 (Cu-Zn-40): automotive locking devices, door locks, keys and sanitary fittings. Leaded Cu-Zn-40 is used for keys, sanitary fittings, door locks and hinges.
- Naval brass (Cu-Zn-38Sn1): precision shipboard equipment, pressure vessels, condenser plates, heat exchangers, marine hardware and baffle plates.
- Cu-Zn 37 with under 50 ppm lead: handicrafts, the button industry, food-grade utensils, jewellery and metal goods.
Grades, temper and hardness
We supply Industrial, Free Cutting and Naval grades. Temper runs from soft to spring hard (Spring Hard, Extra Hard, Full Hard, Half Hard, Quarter Hard, LHA, Soft) and hardness from 60 VPN to 220 VPN. Brass coils are available in grades 63, 70 and 85.
How to choose
- Start from the part: forming-heavy parts and machined parts ask different things of the alloy.
- Say whether lead content matters, for example for food-contact or drinking-water use.
- Give the thickness, width or diameter, and the temper or hardness your process needs.
- Tell us the quantity and where it must be delivered.
Use the quote form or WhatsApp to send your grade and size, and we will confirm availability.
Need a quote or technical advice?
Tell us the grade, size or model and quantity. Our Indore or Faridabad office will respond.