SMAW Electrodes
AMA 1388N
-
E 8018-NM1–H4
AWS/ASME SFA-5.5:
Application/properties :
Basic electrode used for welding fine-grained structural steels with high strength. Its weld metal has excellent toughness due to the presence of nickel and is very resistant at low temperatures. Weld metal is extremely metallurgical pure having very low hydrogen content. The electrode has a stable and concentrated arc, thus being well-suited or positional welding. Welds are of X-ray quality.
Weld metal analysis in % (typical values):
| C | Mn | Si | Mo | Ni | S | P |
|---|---|---|---|---|---|---|
| 0.06 | 1.1 | 0.3 | 0.45 | 0.1 | <0.02 | <0.02 |
Mechanical Properties of all-weld metal:
(single values are typical values)
| Tensile Strength ( N/mm 2 ) | Yield Strength ( N/mm 2 ) | Elongation A4 (%) | Impact energy (J) ISO - V -40°C | Heat treatment |
|---|---|---|---|---|
| 580-660 | >500 | >22 | 100 | AW |
AW: As weld
| Welding Parameters | ||
|---|---|---|
| Diameter (mm) | Length (mm) | Amperage (A) |
| 2.5 | 350 | 65– 90 |
| 3.25 | 450 | 90 – 130 |
| 4.0 | 450 | 140 – 180 |
| 5.0 | 450 | 190 – 230 |
Rebaking:
- Required at 300°C to 350°C for 2 hours
- Preheating, inter pass temperature and post weld heat treatment in accordance with base metal to be welded.
