AMA OP123

سپتامبر 23, 2019ehsanhs95Variety Saw Fluxes

AMA OP123

Product Name:

F7A0-EM12K	F7A0-EL12
F7P0-EM12K	F7A0-EM12

AWS/ASME:

SA AB 1 67 AC	EN 760
B AB 1 67 AC 10 M	DIN 32 522

Standards:

Application/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:

CaF2	Al2O3 + MnO	CaO + MgO	SiO₂ + TiO₂
10%	45 %	20%	20%

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, part1

all-weld metal analysis( typical values ):

Weight %				With Wire Electrode
Mo	Mn	Si	C	DIN/EN	AMA Trade Name
–	0.7-1.1	0.2-0.4	0.05-0.08	S1	50-11
–	1.2-1.6	0.2-0.4	0.05-0.08	S2	50-12
0.5	1.2-1.6	0.2-0.4	0.05-0.08	S2Mo	50-14

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

Impact energy (Joule) ISO – V				Elongation Lo = 5d %	Yield Strength (N/mm²)	Tensile Strength (N/mm²)	Heat Treatment	With Wire Electrode
-20°C		±0°C	+20°C	Elongation Lo = 5d %	Yield Strength (N/mm²)	Tensile Strength (N/mm²)	Heat Treatment	AMA Trade Name
35<	> 50		> 90	> 24	> 360	420-520	As Welded	50-11
35<	> 50		> 90	> 22	> 400	500-600	As Welded	50-12
35<	> 50		> 65	> 18	> 450	600-700	As Welded	50-14

Mechanical properties of welded joints( typical values ):

Welding from both sides in one pass	Multi pass joint welding	Materials
With wire electrode	With wire electrode	General structural steels
50-12,50-14	50-11	St 37-2, USt 37-2, RSt 37-2
50-12,50-14	50-12	St 37-2, St 44-2, St 44-3, St 52-3
With wire electrode	With wire electrode	Pipe Steels
50-12,50-14	50-11	StE 210.7, StE 240.7
50-12,50-14	50-12	StE 290.7, StE 320.7, StE 360.7
50-12,50-14	50-11	St 37, St 37.4, St 35.8
50-12,50-14	50-12	St 44, St 44.4, St 45.8
50-12,50-14	50-12	St 52, St 52.4
50-12,50-14	50-11	X 42
50-12,50-14	50-12	X46, X 52, X56
50-12,50-14	50-14	X 60, X65, X 70
With wire electrode	With wire electrode	Boiler Plates
50-12,50-14	50-11	H I, H II
50-12,50-14	50-12	17 Mn 4, 19 Mn 5
With wire electrode	With wire electrode	Fine grain structural steels
50-12,50-14	50-11	StE 255, WStE 255
50-12,50-14	50-12	StE 285, WStE 285
50-12,50-14	50-12	StE 315, WStE 315
50-12,50-14	50-12	StE 355, WStE 355
50-12,50-14	50-12	StE 380, WStE 380
50-12,50-14	50-11,50-14	StE 420, WStE 420

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.