GRIDUR 250

IDENTIFICATION : GRIDUR 250

CLASSIFICATION :AWS/SFA 5.5 E 8018W2 IS: E55BG129Fe EB 5326 H2JX

DESCRIPTION :

An extruded heavy coated, Chromium Nickel Copper alloyed, low hydrogen Iron Powder electrode for welding fine grained and Low Alloy Steels.

WELDING PROPERTIES:

Weldable in all Positions except vertical down. Arc is stable . Striking and restriking properties are good. Medium spatter. Slag is easy to remove. The Appearance of weld is smooth and evenly rippled, flat to convex.


WELD METAL ANALYSIS (RANGE) % :

C Mn Si S
0.10 Max 0.5-1.3 0.35-0.80 0.03 Max

 

TYPICAL USES :

For welding of high strength low alloy structural steel with enhanced corrosion resistance to IRS M41-74 and similar.


MECHANICAL PROPERTIES (RANGE) :

Tensile Strength Yield Stress Elongation (%) (L=4D) Impact Value
560-620 N/mm2 470 N/mm2 26 min -20C | 28J

RECOMMENDED CURRENT AND PACKING DATA :

SIZE (mm) LENGTH (mm) AMPS AC(70V) DC(+) PACKING PER BOX WEIGHT 1000 Pcs
2.50 350 60-80 160X4=640 21.88
3.15 450 90-130 110X4=440 46.22
4.00 450 140-190 70X4=280 71.10
5.00 450 190-250 45X4=180 108.00

APPLICABLE FOR :

For welding of fine grained steels and steels containing approximately 1 % Chromium, 0.5 % Nickel, 0.5% Copper, steels of dissimilar compositions having greater resistance to atmospheric corrosion. Excellent for weathering steels like Corten - A & B Steels, SAILCOR, ETC and of radiographic quality weld.


WELDING PROCEDURE :

Use short arc length. Weaving of electrodes. if necessary, should be done at slow - speed keeping a short arc. The electrodes should be used in perfectly dry condition. Redry the electrodes at 3500 C for one hour.