AK-S60SD/ AK-AF217SD
Standard:
EN ISO ——
AWS A5.23M F62A2/A4-EG-G
GB/T 36037 SA FB 1
Characteristics and applications: AK-S60SD is a submerged arc welding wire for low alloy high strength steel, AK-AF217SD is a fluorine base type high basicity sintered flux. The combination of AK-S60SD and AK-AF217SD, the size of flux is 10 ~ 60 mesh, the welding technology is good, the arc is stable, the slag is easy to be removed, the deposited metal has good low temperature impact toughness and crack resistance. It is suitable for the welding of 600MPa high strength steel structure in hydropower industry. It is often used in the low alloy welding of ship, machinery, chemical industry, bridge, steel structure and so on.
Note:
1, before the use of flux must be 300 ~ 350 ° C baking 1-2 hours, welding wire should be dry before use, no oil, Rust State
2, welding should be strictly removed before the welding area of oil, rust, moisture and other impurities,
3. When welding, preheat 150 ~ 300 ° C (depending on plate thickness and material) .
4. Recommended welding specification (taking Φ4.0 wire as an example) I = 500 ~ 550A, U= 28 ~ 32V, welding speed V = 50 ~55cm/min, inter-pass temperature 150 ~ 180 ° C.
5. To ensure the plasticity of deposited metal, it is necessary to dehydrogen at 200 ~ 240 °C for 2 ~ 4 hours after welding.
Flux Quality Requirements:
1. Flux water content ≤0.10%
2. Mechanical inclusions ≤0.30.
3. in flux, flux s 0.050%
4. Flux p content ≤0.060%
Deposited metal x-ray detection requirements: Grade I
Typical Chemical Composition(%):
C:0.070 Si:0.050 Mn:1.87 S:0.005 P:0.012 Ni: 1.00 Mo: 0.26
Mechanical properties of deposited metal:
Tensile strength (MPa) : 620-760
Yield Stress (MPa) : ≥540
Elongation (%) : ≥17
Impact values (J) : ≥27J/-20℃, 95J/-40℃
Recommended :
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