AK-J707
Standard:
EN ISO ——
AWS A5.5 E10015-G
GB/T 32533 E6915-GP
Characteristics and applications: Ak-J707 is a high strength steel electrode with low hydrogen sodium coating. DC reverse connection can be used for all-position welding. Excellent welding process performance, low hydrogen diffusion in weld, with excellent low-temperature toughness and crack resistance. It is mainly used for welding of 700MPa high strength steel structure steel, also used for welding of bridge, boiler and other related parts with the same strength.
Note:
1. The electrode must be baked at 380 ° C for one hour before use.
2. Impurities such as water, oil and embroidery must be removed from the surface of the welding parts.
3. Short arc narrow pass welding, the maximum swing should not exceed three times the line diameter.
Note:
In order to meet the requirements of group G alloy, undiluted weld metal shall be at least conducive to a minimum of this table, with additional chemical composition negotiated between the supplier and the buyer)
Typical Chemical Composition(%):
C:0.15 Si:≤0.80 Mn:≥1.00 S:≤0.030 P:≤0.030 Ni: ≥0.50 Mo: ≥0.20
Mechanical properties of deposited metal:
Tensile strength (MPa) : ≥690
Yield Stress (MPa) : ≥600
Elongation (%) : ≥16
Impact values (J) : ——
Diffused hydrogen content of deposited metal: ≤5.0mL/100g(mercury method or thermal conductivity method)
X-ray detection requirements for deposited metal: Grade I
Recommended parameters: (Polarity: DC)
2.5mm: F(H)-70-100A/ V(OH)-60-90A
3.2mm: F(H)-90-130A/ V(OH)-80-120A
4.0mm: F(H)-140-180A/ V(OH)-130-170A
5.0mm: F(H)-170-220A
