HR Brass

CuZn31Si1

HR Brass

EN CW708R - UNS C69800

CuZn31Si1 is a silicon brass that offers a good balance between mechanical strength, machinability, and corrosion resistance. The addition of silicon improves its wear resistance and service stability, making it a suitable alloy for engineering components subjected to moderate to high loads.

Properties

Machinability
Wear resistance
Compressive Strength

Development

Hot-extruded
Cold-drawn

States

R460 / H115
R530 / H140

Applications

Hydraulic Components
Machined Mechanical Parts
Friction Components

Chemical Composition

ElementCu (%)Zn (%)Pb (%)Neither (%)Fe (%)Yes (%)Other (%)
Contents66–70Remaining≤ 0,8≤ 0,5≤0.40.7–1.3≤0.5

Mechanical Properties

Hardness (HB)≥160
Rm (MPa)≥460
0.2 Rp (MPa)≥240
A%≈18
Density (g/cm³)8.5

Available Sizes

Round

Tube

Custom-made

Standards

EN 12164
EN 12163

Certificate 3.1 available

Upon request when ordering

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