Instruction and Application: Low-sodium type coating of high strength low alloy steel electrodes. DC reverse polarity, all-position welding can be carried out. For the appropriate strength and hot cracking tendency of steel structure welding, such as: nuclear shells, boiler, chemical containers, storage tanks and other welding and welding.
Typical Chemical Composition of the all-welded metal(％)
|
C |
Si |
Mn |
S |
P |
Ni |
|
0.80 |
0.20 |
1.40 |
0.004 |
0.009 |
1.39 |
Mechanical properties of all-weld metal
|
Temperature |
Tensile strength Rm(MPa) |
Yield strength Rp(MPa) |
Elongation A(%) |
Impact Strength KV2(J,-40℃) |
Heat treatment |
|
Room temperature |
640 |
570 |
22 |
118,123,110 |
620℃×2h |
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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