DAIKOWM CuSi3

GMAW
  • COPPER ALLOYS
CuSi

Description

Silicon Bronze alloy soli wire rod
Copper Si alloy, with a controlled Si content (2.80%-3.20) in order to avoid welding defects. It is a wire rod for welding on low-alloyed CuMn, CuSiMn and CuZn materials. High temperature and corrosion resistance. Thanks to its melting range and weldability this alloy reduce the finishing operation after welding. Suitable to weld oxygen-free copper and Cu materials. Used also for galvanized steel GMAW brazing and laser brazing. In case of high thickness, it is recommended to preheat to 300 °C.
Specifications
AWS A5.7
ERCuSi-A
DIN 1733
SG-CuSi3
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)
32
A-No (QW442)
-

Hardness

90HB
Chem. Comp. %
0
Mn
0.9
Al
0.001
Sn
0.01
P
0.01
Si
2.9
Zn
0.03
Mechanical Properties
min
variant
Tensile strength Rm MPa
345
350
Yield strength Rp0.2 MPa
-
140
Elongation A (L0=5d0) %
0
40
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1 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.
CuSi
Description

Application

Silicon bronze 97CuSi stands out for its versatility, offering a wide array of applications beyond those covered by DAIKO CuSn. Its utility spans overlaying steels and cast irons, making it a preferred choice for various needs. Applications range from plates used in chemical plants and molds to stills, calorifiers, rods, and wires for electrical components. The alloy also finds its place in tubes for heat exchangers. Notably, when working with silicon bronze, the convenience of not requiring preheating adds to its appeal. It's recommended to maintain an interpass temperature below 100°C. However, if welding copper, a preheat of around 100°C for 6mm material is essential, rising to approximately 400/500°C for thicker materials of about 15mm.

Alloy Type

Pure copper deoxidized with 3% silicon.

Microstructure

Single phase (fcc).

Materials

General purpose including phosphorus deoxidized copper, silicon bronze, nickel silver and some brasses.

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