IDENTIFICATION
Griduct 138G, E 12018G
CLASSIFICATION
AWS/SFA 5.5 : E12018G,
DIN EN 757 E894 Mn2 Ni1 Cr Mo B42 H5
DESCRIPTION
Heavy coated, hydrogen controlled, all-position electrode depositing, tough and crack free welded joints. Weld deposits is of extremely high purity and very low hydrogen content. Deposited welds are of X-ray quality.
WELD METAL ANALYSIS (RANGE) %
| C | Cr | S | Mn | Ni | Si | Mo | P | V |
| 0.06 max | 0.70 max | 0.015 max | 1.65 max | 2.40 max | 0.48 max | 0.50 max | 0.015 max | 0.02 max |
MECHANICAL PROPERTIES (RANGE)
| UTS (MPa) | PS (MPa) | EL (%) (L=4D) | CVN Impact Value | |
| Temp | Joules | |||
| 950 min | 890 min | 14 - 20 | 27°C | 70 - 150 |
| -40°C | 70 min | |||
TYPICAL APPLICATIONS
• For welding Q & T high tensile steels type HY 130 and equivalent Normalised+tempered five grain structural steels with yield stress up to 900 MPa.
• For welding BRINAR 400 / DILLIDUR 400 steel.
SPECIAL INSTRUCTIONS FOR WELDING
• Maintain preheat & interpass temperature in the range 100-120°C.
• Use lower dia electrode with minimum heat in-put to get desired structure & mechanical properties.
• When welding is completed, maintain temperature of 200-250°C for 4-6 hours for removing Diffusible Hydrogen from HAZ and weld metal.
REDRYING OF ELECTRODES : 300-350°C / 2 hrs.
DIFFUSIBLE HYDROGEN CONTENT IN THE WELD METAL : max. 4.0 ml / 100 g of weld metal.
WELDING POSITION :
PACKING PARAMETERS
| Size (mm) | Length (mm) | Amps | Packing / Box (kg) | Packing / Box (Pcs) |
| AC (70 OCV) / DC (+) | ||||
| 2.5 | 350 | 65 -95 | 5 x 4 = 20 | 160 x 4 = 640 |
| 3.15 / 3.20 | 450 | 90 - 135 | 5 x 4 = 20 | 110 x 4 = 440 |
| 4 | 450 | 140 - 185 | 5 x 4 = 20 | 70 x 4 = 280 |
| 5 | 450 | 180 - 240 | 5 x 4 = 20 | 45 x 4 = 180 |