Instruction and Application: Low hydrogen - type Cu70-Ni30 alloy welding cored electrode.Arc stable, forming good, DC reverse.It is suitable for welding of Cu70-Ni30 alloy, Cu70-Ni30 alloy / 645-III steel composite metal and Cu70-Ni30 alloy coating, and 645-III steel for the lining structure of the base.
Typical Chemical Composition of the wire(％)
|
Cu |
Si |
Mn |
P |
Ni |
Fe |
|
Remainder |
0.18 |
1.5 |
0.007 |
31.0 |
2.2 |
Mechanical properties of all-weld metal
|
Temperature |
Tensile strength Rm(MPa) |
Elongation A(%) |
Bending D=4t,180o |
|
Room temperature |
440 |
30 |
Qualified |
Reference Current(DC+)
|
Size φ（mm) |
Φ2.5 |
Φ3.2 |
Φ4.0 |
|
Welding current(A) |
50~70 |
90~110 |
120~160 |
Notice:
1. Redry the flux before welding at 300℃ for 1hours.
2. The welding surface rust, oil fouling and other impurities must be cleaned up.
3. Interpass temperature should be controlled below 150 ℃.
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