Brass (known locally as Kuningan) is a versatile non-ferrous alloy made primarily of copper and zinc. Unlike the stainless steel grades previously discussed, brass contains no iron, making it completely immune to rust while offering exceptional machinability and electrical conductivity.
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Key Technical Specifications
| Property | Details |
| Common Forms | Solid round bars (As Kuningan), hex bars, sheets and plates |
| Chemical Composition | Typically 60%–70% Copper and 30%–40% Zinc (often with trace elements like lead to improve machinability). |
| Common Grades | C3604 (Free-cutting brass, ideal for CNC machining) and C2680 (highly ductile, ideal for sheets and stamping). |
Main Properties & Characteristics
| Property | Details |
| Zero Rusting | It cannot rust because it contains no iron, though it will form a green/brown protective patina layer over time when exposed to air. |
| Extreme Machinability | It is significantly softer than stainless steel (201/304/316), making it the easiest metal to cut, drill, thread, and mill. |
| Low Friction & Anti-Sparking | It has very low friction against other metals and does not create sparks when struck, making it safe for explosive environments. |
| Highly Conductive | Excellent conductor of both heat and electricity, far outperforming all stainless steel grades. |
| Aesthetic Appeal | Features a bright, gold-like appearance that polishes to a high shine for decorative use. |
Common Industrial Applications
Because of its unique mechanical and spark-free properties, brass is heavily used for:
| Application | Details |
| Plumbing & Fluid Control | Valves, water meters, pipe fittings, and high-pressure gas regulators. |
| Precision Machined Parts | Gears, lock cylinders, keys, bearings, nuts, and bolts. |
| Electrical Engineering | Terminals, connectors, switch components, and plug pins. |
| Decor & Architecture | Luxury handrails, interior trim, musical instruments, and nameplates |
COPPER
Stainless Steel 316 (SS316)
MILD STEEL/ST41
AB2
Brass
