AK-S80A/ AK-AF80SD
Standard:
EN ISO ——
AWS A5.23M F76A4-EG-G
GB/T 36037 SA FB 1
Characteristics and applications: AK-S80A is a submerged arc welding wire for low alloy high strength steel, AK-AF80SD is a fluorine-base type sintered flux, light gray spherical particle, particle size 12 ~ 50 mesh, copper-plated wire AK-S80A and flux AK-AF80SD combination, it can obtain excellent welding process performance, DC welding, welding wire positive electrode, arc stability, beautiful shape, easy slotting slag, weld metal S, P content is low, with excellent low temperature impact toughness and crack resistance. Mainly used for pumping energy storage, large hydropower equipment 800MPa grade high-strength steel pressure pipeline welding. It is also suitable for welding important structures of Q690E and E690 alloy steel such as ocean engineering, ships, bridges, pressure vessels, etc. .
Note:
1. before the use of flux must be 350 ° C ~ 400 ° C baking 1 ~ 2 hours, welding wire before use should be dry, oil-free, rust-free state.
2. before welding should be strictly removed welding oil, rust, moisture and other impurities.
3. Recommended welding specifications (taking φ4.0 wire as an example) i = (525 ± 50) a, U = (30 ± 2) V, welding speed V = (38 ± 2) cm/min, and inter-pass temperature (150 ± 15) °
4. To ensure the plasticity of deposited metal, it is necessary to dehydrogen at 200 ~ 240 °C for 2 ~ 4 hours after welding.
5. welding materials in the storage room to keep dry, and the ground and wall to keep a certain distance. Storage should pay attention to distinguish models, specifications, can not be mixed up.
Flux Quality Requirements:
1. Flux water content0.10%
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:0.035 Si:0.39 Mn:1.53 S:0.004 P:0.010 Ni: 2.13 Cu：0.06 Mo: 0.50 Cr：0.27
Mechanical properties of deposited metal:
Tensile strength (MPa) :780-900
Yield Stress (MPa) : ≥680
Elongation (%) : ≥15
Impact values (J) : 130J/-40℃
Recommended :
——
