Range of

alloys

Moston 
designation

Chemical
Composition%

Mechanical
Properties

Properties
and Uses

Cu 55 Zn Mn

M-17

Cu 55,0-64,0
Mn 1,5-3,5
Fe 0,5-1,5
Ni 1,0-3,0
Zn bal.

GC/GZ:
Rm* 325
Rp 0,2* 150
A5* 15
HB* 85

Pump bodies, valves and fittings
resistant to high water pressure

Cu Zn 35 Al 1

M-18

Cu 56,0-65,0
Mn 0,3-3,0
Al 0,5-2,0
Fe 0,5-2,0
Zn bal.

GZ:
Rm* 500
Rp 0,2* 200
A5* 18
HB* 120

Good resistance to corrosion and an excellent combination of strength & ductility Used in marine fittings,valve stems, lever arms and light duty gears

Cu Zn 34 Al 2

M-19

Cu 55,0-66,0
Mn 0,3-4,0
Al 1,0-3,0
Fe 0,5-2,5
Zn bal.

GZ:
Rm* 620
Rp 0,2* 260
A5* 14
HB* 150

Brackets, shafts, gears & structural parts

Cu Zn 25 Al 5

M-20

Cu 60,0-67,0
Mn 2,5-5,0
Al 3,0-7,0
Fe 1,5-4,0
Zn bal.

GZ:
Rm* 750
Rp 0,2* 480
A5* 5
HB* 190

Slow speed heavy duty load gears, bearings, cams & hydrolic cylinder parts

Cu Zn 37 Al 1

M-21

Cu 60,0-64,0;
Al 0,3-1,8
Zn bal.

GZ:
Rm* 450
Rp 0,2* 170
A5* 25
HB* 105

Levers, gear wheels & bevel gears,high pressure valves & fittings, contacts, connections. Good corrosion resistance

GC
GZ 
G  

Continuous Casting
Centrifugal Casting
Sand Casting

Rm
Rp 0,2
A5
HB

Tensile strength in N/mm2
Yield stress in N/mm2
Elongation in %
Hardness Brinell

Range of alloys

Moston 
designation

Chemical
Composition%

Mechanical
Properties

Properties
and Uses