IDENTIFICATION
Griduct 5, E 7018-G
CLASSIFICATION
AWS/SFA 5.5: E7018G
DESCRIPTION
A heavy coated basic type, hydrogen-controlled, iron powder electrode with high deposition efficiency. The electrode deposits weld metal having about 0.60% nickel and are of radiographic quality and meets impact requirements at -50° C.
The weld deposit is tough, ductile and is highly resistant to hot or cold cracking even when subjected to high stresses, dynamic loading etc.
WELD METAL ANALYSIS (RANGE) %
| C | Mn | Si | S | P | Ni |
| 0.10 max | 1.0 - 1.60 | 0.55 max | 0.025 max | 0.03 max | 0.40 - 0.80 |
MECHANICAL PROPERTIES (RANGE)
| UTS (MPa) | YS (MPa) | EL (%) (L=4D) | CVN Impact Value | |
| Temp | Joules | |||
| 500 - 600 | 440 - 540 | 24 - 30 | -50°C | 30 - 80 |
TYPICAL APPLICATIONS
• For the welding of structural steel where resistance to brittle fracture is required under adverse operating conditions such as those found in off-shore production platforms.
• Used for production of pressure vessels, bridges, pipelines
• Recommended for higher carbon & higher Sulphur steels, which are susceptible to hydrogen induced cracking.
• For welding SAILMA 350HI steel, storage tanks, pipe line etc.
REDRYING TEMPERATURE : 250°C / 2 hrs
DIFFUSIBLE HYDROGEN : max 5.0ml/100g of weld metal in the weld metal
ASME IX QUALIFICATION : QW 432 F - NO 4, QW 442 A - NO 1
WELDING POSITION :
PACKING PARAMETERS
| Size (mm) | Length (mm) | Amps | Packing / Box (kg) | Packing / Box (Pcs) |
| AC (90V) / DC (+) | ||||
| 2.5 | 350 | 65 - 85 | 5 x 4 = 20 | 160 x 4 = 640 |
| 3.15 / 3.20 | 450 | 110 - 140 | 5 x 4 = 20 | 110 x 4 = 440 |
| 4 | 450 | 140 - 180 | 5 x 4 = 20 | 70 x 4 = 280 |
| 5 | 450 | 180 - 240 | 5 x 4 = 20 | 45 x 4 = 180 |