High Tensile Brass

WEAR RESISTANCE

Excellent

HARDNESS

200�260 HB

CORROSION RESISTANCE

Very good in seawater

DENSITY

7.95 g/cm�

MACHINABILITY

30�40%

Technical Data

Composition, Mechanical & Equivalent Grades

Chemical Composition � CW721R / CuZn25Al5Mn4Fe3

CUZNALMNFENI
63.0�68.0Bal.3.0�6.02.5�5.02.0�4.0≤3.0

Mechanical Properties

PROPERTYUNITVALUE
Tensile StrengthMPa700�800
Yield Strength (0.2%)MPa450�550
Elongation A50%10�18
HardnessHB200�260
Densityg/cm�7.95
Melting Range�C880�920

International Equivalent Grades

STANDARDGRADE
ENCW721R � CuZn25Al5Mn4Fe3
ASTMC67500 / C86300
DIN2.0598
BSCZ135 / HTB1

Why This Alloy

Engineering highlights

  • Tensile strength up to 800 MPa
  • Outstanding wear & galling resistance
  • Good corrosion resistance in seawater
  • Used as bronze substitute in high-load assemblies

Applications

Industrial applications

Synchroniser rings (automotive)
Heavy-duty bearing cages
Valve seats and stems
Pump impellers & wear plates
Marine propeller bossings
Manufacturing Capability
  • Hot forging
  • Sand casting
  • CNC machining
  • Heat treatment
Surface Finishes
  • As-machined
  • Polished
  • Passivated
Industries Served
  • Automotive
  • Marine
  • Heavy Engineering
  • Defence

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