Instruction and Application: Low-sodium type coating of high strength low alloy steel electrodes. DC reverse polarity, can be carried out for all-position welding, welding performance. Application in nuclear reactor pressure vessels, steam generators and regulators, in component manufacturing.
Typical Chemical Composition of the all-welded metal(％)
|
C |
Si |
Mn |
S |
P |
Ni |
Mo |
Cr |
|
0.07 |
0.40 |
1.64 |
0.004 |
0.008 |
0.86 |
0.049 |
0.02 |
Mechanical properties of all-weld metal
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-20℃) |
Heat treatment |
|
Room temperature |
690 |
670 |
21.0 |
150,145,160 |
AW |
|
640 |
570 |
24.5 |
133,140,150 |
HD (Mercury method): ≤5.0ml/100g
Deposited metal radio-graphic testing:
According to NB / T 47013.2, the radio-graphic detecting technique should not be less than class AB and the quality grade of deposited metal should not be less than Class I.
Reference Current (DC+):
|
Sizeφ（mm) |
φ2.5 |
φ3.2 |
φ4.0 |
φ5.0 |
|
Amperage (A) |
70-100 |
90-130 |
130-180 |
180-220 |
Notice:
1.Redry the electrode at 400℃ for 1hours.
2.Multi-pass welding must clean the welding slag. Each layer is controlled below 250 ℃.
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