DAIKOWM CuMn13Al

GMAW
  • COPPER ALLOYS
CuMnAl

Description

Aluminum-Nickel alloyed copper solid wire
This wire rod is particularly suitable for highly stressed corrosion resistant overlay welding on cast iron and on unalloyed and low alloyed steels. It deposits zinc free copper aluminum manganese alloy with high tensile strength and hardness. It can be used for assembly of copper-aluminum, for surfacing on steels and cast iron as well as for cavitation resistant overlayers. Manganese-Nickel-Aluminum bronze is suitable for sea water resistant joint welds, particularly with erosion, corrosion and cavitation and for surfacing of Cu-alloys, Carbon-Manganese steels and cast-iron.
Specifications
EN ISO 24373
S Cu 6338
AWS A5.7
ERCuMnNiAl
DIN 1733
SG-CuMn13Al7
Shielding
I1, I3
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Packaging Type
Drums, B300, D200 and D100 spools.
Asme qualifications
F-No (QW432)
37
A-No (QW442)
-

Hardness

220HB
Chem. Comp. %
DEFAULT
Mn
12.1
Ni
2.4
Cr
0.004
Nb
0.003
Al
7.7
V
0.001
P
0.001
Si
0.003
Fe
2.5
Mechanical Properties
min
variant
Tensile strength Rm MPa
515
890
Yield strength Rp0.2 MPa
-
340
Elongation A (L0=5d0) %
0
220
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.0 mm
1.2 mm
Ampere
130A - 200A
185A - 245A
Voltage
24V - 28V
26V - 30V
Packaging
Ø 0,8÷1,6mm
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Drums, B300, D200 and D100 spools.
Description

Application

The CuMnAl alloy is mainly used for joining and surfacing on complex aluminum bronzes, particularly on materials with a high manganese content, as well as on steel and cast steel. Thanks to its excellent resistance to seawater and corrosion, it is particularly suitable for the shipbuilding industry, finding applications in objects such as propellers, pumps, and fittings. In industrial chemistry, it is ideal for components such as valves, guides, and pumps, especially when exposed to chemical attacks combined with erosion. Its good friction coefficient makes it perfect for overlays on wavy surfaces, sliding surfaces, bearings, and matrices of all kinds. The weld deposit offers excellent mechanical properties, being robust and crack-resistant. It is characterized by excellent workability in chip removal, corrosion resistance, and non-magnetic properties. Before welding, it is essential to clean the area to achieve a bright metallic finish. For large welds, preheating to about 150°C is recommended, keeping the absorbed heat to a minimum and ensuring that the interpass temperature does not exceed 150°C.

Alloy Type

Highest grade of the Al-Bronze-types.

Microstructure

Consists of primary α-phase grains in a matrix composed mainly of γ-phase grains and an intergranular phase layer containing both α and γ-phase particles.

Materials

This alloy is also used to join or repair high-strength bronzes of similar chemical composition and for high-strength repairs of cast iron.

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