IDENTIFICATION
Griduct 3, E 8018-B2
CLASSIFICATION
AWS/SFA 5.5: E 8018B2, IS 1395:E 55B - 226Fe,
BS: 2493E1CrMoBH, DIN 8575-84 ECrMo1B20+
DESCRIPTION
A heavy coated, low hydrogen, all position, except vertical down, Synthetic electrode which deposits 1.25% Cr / 0.5% Mo weld metal. It is intended for welding creep resisting steels of similar composition, used in power generating plant operating at temperatures upto 570°C. The welds are of X-ray quality.
WELD METAL ANALYSIS (RANGE) %
| C | Mn | Si | S | P | Cr | Mo |
| 0.05 - 0.12 | 0.5 - 0.9 | 0.2 - 0.6 | 0.025 max | 0.03 max | 1.0 - 1.50 | 0.4 - 0.65 |
MECHANICAL PROPERTIES (RANGE)
| UTS (MPa) | PS (MPa) | EL (%) (L=4D) | CVN Impact Value | Fillet Weld test | |
| 550 - 690 | 460 - 590 | 19 - 26 | Temp | Joules | Satisfactory |
| 27°C | 55 - 100 | ||||
TYPICAL APPLICATIONS
• ASTM A 335 grades P11 and P12
• ASTM A 155 grades ½ C, 1 Cr, 1 ¼ Cr, A 182F11,
• DIN 13 CrMo44, GS-17CrMo55, BS 3604 grades
• 620 and 621.
• Ideal for welding Chromium-Molybdenum alloy steels (0.5Cr-0.5Mo, Icr-0.5 Mo, 1.25Cr-0.5Mo)
• Boilers, pressure vessels, headers, high pressure piping, heat exchangers and condensers.
• Power generation, oil refineries, petrochemical
industries.
ASMEQUALIFICATION : QW–432 F.NO4, QW-442 A NO.4
RECOMMENDED REDRYING : 300°C/2 hrs, (Max. 5 times, total 10 hrs max.)
MOISTURE IN THE FLUX COATING : 0.3% by weight, max
DIFFUSIBLE HYDROGEN CONTENT IN THE WELD METAL : Max 5 ml/100g. of weld metal
RECOMMENDED PREHEATING & INTERPASS TEMPRATURE : 163°C-191°C
MICROSTRUCTURE : After PWHT, the microstructure consists of tempered bainite.
WELDING POSITION :
PACKING PARAMETERS
| Size (mm) | Length (mm) | Amps | Packing / Box (kg) | Packing / Box (Pcs) |
| AC (70V) / DC (+) | ||||
| 2.5 | 350 | 60 - 80 | 5 x 4 = 20 | 160 x 4 = 640 |
| 3.15 / 3.20 | 450 | 90 -130 | 5 x 4 = 20 | 110 x 4 = 440 |
| 4 | 450 | 140 - 190 | 5 x 4 = 20 | 70 x 4 = 280 |
| 5 | 450 | 190 - 250 | 5 x 4 = 20 | 45 x 4 = 180 |