HR Brass

CuZn21Si3P

HR Brass

EN CW724R - UNS C69300

CuZn21Si3P is a low-alloy silicon brass containing zinc, silicon, and phosphorus. It is characterized by very good mechanical strength, excellent wear resistance, and good friction properties, while maintaining good corrosion resistance. This alloy is particularly well-suited for technical applications requiring reliability and durability.

Properties

Corrosion Resistance
Machinability
Wear resistance

Development

Hot-extruded
Cold-drawn

States

R500 / H130
R670 / H130

Applications

Gears and Precision Mechanical Parts
Self-lubricating bearings and bushings
Hydraulic system

Chemical Composition

ElementCu (%)Neither (%)Pb (%)Sn (%)Zn (%)P (%)Al (%)Fe (%)Mn (%)Other (%)Yes (%)
Contents75–77≤0.2≤0.1≤0.3Remaining0.02–0.10.05≤ 0,3≤ 0,05≤0.22.7–3.5

Mechanical Properties

Hardness (HB)170–220
Rm (MPa)≥670
0.2 Rp (MPa)400
A%10
Density (g/cm³)7.8

Available Sizes

Round

Hexagonal

Custom-made

Standards

EN 12164

Certificate 3.1 available

Upon request when ordering

* These values are for reference only; they may vary depending on the standard and condition.