F7P6-EH12K F7P5-EM13K F7P5-EM12K F7A4-EM12 F8A4-EA2 F8A5-EH12K F7A5-EM13K F7A4-EM12K F8A4-EA2 F8A5-EH12K F7A5-EM13K F7A4-EM12K
ap380 ama ap380

Flux for Submerged Arc welding of General Struct

AMA AP380

EN 760: SA AB 1 67 AC H5
DIN 32 522: B AB 1 67 AC 12MHP5
AWS/ASME: F7P6-EH12K    F7P5-EM13K     F7P5-EM12K    F7A4-EM12      F8A4-EA2 F8A5-EH12K       F7A5-EM13K        F7A4-EM12K    F8P5-EA2 -
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Application / Properties:
Agglomerated aluminate-basic type flux for welding of medium tensile and pipe steels up to X70 grade. AP380 produces a slight silicon and manganese pick-up.
Owing to its metallurgical behavior, it can be used with S2Mo and S3Mo wire electrodes. The flux is suitable for longitudinal and spiral welding of pipes.
It has a high current carrying capacity and as such is suitable for fillet and butt-welding applications especially for weld 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.
AP380 can be used on either. DC+ or AC up to 1200 A on a single wire.

Damp flux shall be redried by baking at 300°C – 350°C
Grain size in accordance with DIN 32 522:2-18.

Main Constituents:

SiO2+TiO2 CaO+MgO Al2O3+Mno CaF2
20% 25% 35% 15%

Basicity to boniszewski: ~1.5

All weld metal analysis (typical values):

Welding Wire Weight %
AMA Trade Name DIN/EN C Si Mn Mo
50-11 S1 0.06 0.15 0.8 -
50-12 S2 0.06 0.2 1.3 -
50-14 S2mo 0.05 0.2 1.2 0.5
50-18 S4 0.09 0.3 1.8 -

Mechanical properties of all-weld metal (typical values):

Welding Wire Tensile Strength
( N/mm 2 ) 		Yield Strength
( N/mm 2 ) 		Elongation
Lo=5d % 		Impact Value
ISO -V
20°C     -40°C      -60°C
50-11 470 360 26 120        60          -
50-12 510 420 28 140        90          50
50-14 580 490 25 90        45          -
50-18 580 480 26 105        65          50

Mechanical properties of all-weld metal (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
ISO -V
20°C     -40°C      -60°C
50-12 >460 >350 - 80        70          50
50-14 >610 >520 - 70        50          -