En
FaF7A5-EM13K F7P6-EH12K F7A4-EM12K F7A4-EM12 F7P5-EM13K F8A5-EH12K F7P5-EM12K F8A4-EA2 F8P5-EA2
ap440 ama ap440
Flux for Submerged Arc welding of General Struct
AMA AP440
| EN 760: | SA AB 1 67 AC H5 |
| DIN 32 522: | B AB 1 67 AC 12MHP5 |
| AWS/ASME: | F7A5-EM13K F7P6-EH12K F7A4-EM12K F7A4-EM12 F7P5-EM13K F8A5-EH12K F7P5-EM12K F8A4-EA2 F8P5-EA2 |
Type / Characteristics:
Agglomerated aluminate-basic type flux for welding of medium tensile steels and pipe steel up X70 Grade. AMA-AP440 produces a slight silicon and manganese pick-up. It is suitable to be used in high speeds welding with single or multi wire and tandem welding systems. The flux has a high current carrying capacity and as such is suitable for fillet and butt welding applications especially for welds in heavy section steels work. The weld bead is of uniform profile with smooth weld bead profile and good blending at the weld toes even at high welding speeds. The slag detachment is good and in most cases is self-lifting. AMA-AP440 is used with a range of low alloy wires including AMA 50-14, AMA 50-57 for the seam welding of pipes were low temperature impact toughness properties are required.
This flux can be used for welding of suer gas pipe with S2MoTiB or S3MoTiB wires.
AMA-AP440 can be used on either DC (positive) or AC up to approximately 1200A.
Damp flux shall be redried by baking at 300°C – 350°C
Grain size according to DIN 32 522:3-18.
Main Constituents:
| SiO2+TiO2 | CaO+MgO | Al2O3+Mno | CaF2 |
|---|---|---|---|
| 20% | 25% | 35% | 15% |
Basicity as to boniszewski: ~1.5
Mechanical properties of all – weld metal (typical values):
| Welding Wire | Weight % | ||||
|---|---|---|---|---|---|
| AMA Trade Name | DIN/EN | C | Si | Mn | Mo |
| 50-12 | S2 | 0.06 | 0.2 | 1.3 | - |
| 50-14 | S2mo | 0.06 | 0.2 | 1.35 | 0.5 |
All – weld metal analysis (typical values):
| Welding Wire |
Tensile Strength ( N/mm 2 ) |
Yield Strength ( N/mm 2 ) |
Elongation Lo=5d % |
Impact Value
(Joule)
ISO -V 20°C -40°C- |
|---|---|---|---|---|
| 50-12 | 515 | 420 | 28 | 130 80 |
| 50-14 | 580 | 490 | 27 | 110 60 |
Mechanical properties of welded joint (typical values):
X70 plates–weld from both sides in one pass
| Welding Wire |
Tensile Strength ( N/mm 2 ) |
Yield Strength ( N/mm 2 ) |
Elongation Lo=5d % |
Impact Value
(Joule)
ISO -V 20°C -30°C- |
|---|---|---|---|---|
| 50-14 | 590 | 495 | - | 90 70 |