AMA OP123

Application and properties:

Agglomerated aluminate-basic type flux for welding general structural steels, pressure vessel and pipe steels, as well as fine grain structural steels. AMA-OP123 produces slight silicon and mean manganese pick-up. Owing to its metallurgical behavior, It can be used with 50-11, 50-12, 50-14 wire electrodes. It is suited to be used in twin-wire and multi-wire welding, as well as in welding from both sides in one pass, e.g. In the production of large diameter pipes. With this process variant, the use of molybdenum alloyed wire electrodes for increased toughness values is advisable. An outstanding feature of AMA-OP123 flux is its high current carrying capacity. Unless there are limitation imposed by base metal quality, this feature of the flux can be of benefit when slag can be easily removed in all cases, the slag being short, i.e. girth seams of small diameter work pieces can be welded without the danger of the slag running off. On account of its low bulk density, flux consumption is low.
AMA-OP123 can be used on either DC (positive) or AC up to 1000A.

Damp flux shall be redried by baking at 300°C – 350°C
Grain size in accordance with DIN 32 522:2-20*.

Main Constituents:

Basicity to boniszewskii: ~1.0

Metallurgical behavior:

Pick-up and burn-off the alloying elements Si and Mn as a function of the alloy content of the wire electrode, DVS Merkblatt 0907, part 1

All -Weld metal analysis (typical values):

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

Application:

For welding from both sides in one pass, especially in multi-wire welding 50-14 wire electrode should be used because of the fine-grain formation caused by molybdenum.