Welding Electrodes AWS E7018
1) All positon welding.
2) Low hydrogen potassium type coating.
3) High crack-resistance.
E7018 is an outstand quality all position welding electrode covered with extra low hydrogen potassium type coating for welding high tensile steels and low alloy steels. It's nominal welding efficiency is about 110% due to iron powder is contained. The weld metal shows an excellent low temperature toughness and high crack-resistance.It is widely used in important projects of ships, boilers, high press vessel, bridges, skyscrapers, offshore drilling platforms, nuclear power stations etc. The groove of base metal should be cleared away impurities and the electrode must be baked at a temperature to 400 degree then be held 1-2 houds before welding, 2.5mm one should be done by 350 degree then be held 1 hour.
Chemical Composition of Deposited Metal (%)
|
C | Mn | Si | S | P | Cr | Ni | Mo | v |
| Standard | ≤0.15 | ≤1.60 | ≤.075 | ≤0.035 | ≤0.040 | ≤0.20 | ≤0.30 | ≤0.30 |
≤0.08 |
Typical | 0.068 | 1.36 | 0.51 | 0.010 | 0.016 | 0.047 | 0.022 | 0.010 | 0.014 |
Mechanical Properties of Deposited Metal
|
Yield Point ReH(Mpa) | Tensile Strength Rm(Mpa) | Elongation A 5(%) | -20°c | -29°c | -46°c |
| Standard | ≥ 375 | 490-660 | ≥22 | ≥ 47 | ≥27 | ≥27 |
| Typical | 440 | 540 | 30 | 170(J) | 150(J) | 130(J) |
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