AK-J80SD
Standard:
EN ISO ——
AWS A5.5 E1101S-G H4
GB/T 32533 E7815-G
Characteristics and Applications: AK-J80SD is an ultra-low hydrogen low alloy electrode with high strength and toughness. It has excellent welding performance, low temperature impact toughness and crack resistance of deposited metal. It is suitable for the welding of spiral case and 800MPA base metal of pressure pipeline in water power equipment, and the welding of marine engineering ship and oil pipeline with the same strength.
Note:
1. The electrode is baked at 380 ° C for 1 ~ 2 hours before use, and then put into 100 ~ 150 ° C incubator.
2. must be removed before the welding surface of water, oil, rust and other impurities.
3. Arc-starting and return transportation technology or arc-starting plate should be used to strengthen arc.
4. according to the plate thickness and steel grade, using different temperature for appropriate preheating.
5. Apply short arc and narrow weld bead during welding.
Typical Chemical Composition(%):
C:0.10 Si:0.60 Mn:≥1.30 S:0.015 P:0.020 Ni: ≥2.00 Mo: 0.60 Cr：0.60
Note: In order to meet the requirements of group G alloy, the undiluted weld metal shall be at least conducive to a minimum value in this table
Tensile strength (MPa) : ≥760
Yield Stress (MPa) : ≥670
Elongation (%) : ≥15
Impact values (J) : ≥27J/-40℃
Diffused hydrogen content of molten metal: ≤4.0mL/100g(mercury method or thermal conductivity method)
Molten metal X-ray detection requirements: Grade I
Recommended parameters: (Polarity: DC)
3.2mm: F(H)-90-130A/ V(OH)-80-115A
4.0mm: F(H)-140-170A/ V(OH)-130-150A
5.0mm: F(H)-180-220A
