OK Flux 10.72
OK Flux 10.72 is an agglomerated, basic flux, designed for the production of wind towers. It combines the high demands for multi-layer thick section welding, using high deposition rates with respectable toughness values down to -50°C when combined with a standard non-alloyed SAW wire. It is used for single and multi-wire procedures such as tandem, twin arc, tandem-twin welding and many more, for butt and fillet welds. It works equally well on DC and AC current. The excellent slag removal in narrow V-joints allows the included angle of the joint to be reduced. OK Flux 10.72 can be applied for unlimited plate thicknesses. In wind tower production, plate thicknesses of 50 mm and above are common, generally welded with Y-joints. It is essential that the slag is easily removable on the first run. For the remaining filling passes the flux needs to offer a high current carrying capacity, to allow for high deposition rates, for example, 38 kg/h with the tandem twin process. Often toughness values down to -50°C are required throughout the thickness. This excellent flux can also be utilised in other market segments with similar welding requirements e.g. pressure vessels and general construction welding.
Typical Weld Metal Analysis %
Typical Weld Metal Analysis % | ||||||||||||||
C | Cu | Mn | Mo | Ni | P | S | Si | |||||||
Spoolarc 75 | ||||||||||||||
0.06 % | - | 1.80 % | - | 0.90 % | 0.013 % | 0.009 % | 0.50 % | |||||||
Spoolarc 81 | ||||||||||||||
0.06 % | - | 1.60 % | - | - | 0.013 % | 0.0069 % | 0.30 % | |||||||
Spoolarc ENi4 | ||||||||||||||
0.07 % | 0.15 % | 1.60 % | 0.15 % | 1.80 % | 0.012 % | 0.006 % | 0.20 % |
Approvals
Wire | CE | CWB | DB | DNV | GL | VdTÜV |
OK Autrod 12.20 | * | - | * | - | - | * |
OK Autrod 12.22 | * | * | * | * | * | * |
OK Autrod 12.24 | * | - | * | - | - | * |
OK Autrod 13.27 | * | - | - | - | - | - |
*Selected production units only. Please contact ESAB for more information. Visit esab.com to download specific flux/wire combination fact sheets for more details. |
Approvals
Approvals |
CE EN 13479 CWB CSA W48 F49A6-EM12K-H8 DB 51.039.12 |
Approvals are based on factory location. Please contact ESAB for more information. |
Classifications
Wire | AWS/EN | AWS - As Welded | AWS - PWHT |
Spoolarc ENi4 | AWS A5.23: ENi4 | F9A4-ENi4-ENi4 | |
Spoolarc 81 | AWS A5.17: EM12K | F7A8-EM12K | F6P8-EM12K |
Spoolarc 75 | AWS A5.23: ENi1K | F8A4-ENi1K-ENi1 | |
Spoolarc 71 | AWS A5.17: EM14K | - | F7P5-EM14K |
Classifications
AWS A5.17 : F6P8-EM12K AWS A5.17 : F7A8-EM12K AWS A5.23 : F8A4-ENi1K-Ni1 AWS A5.17 : F7P5-EM14K AWS A5.23 : F9A4-ENi4-Ni4 ASME SFA 5.23 : ASME SFA 5.17 : |
Consumable Characteristics
Slag Type | Aluminate-basic |
Grain Size | 0.315-2.0 mm (9x48 mesh) |
Diffusible Hydrogen | max 5 ml H/100g weld metal (Redried flux) |
Density | nom: 1.2 kg/dm3 |
Basicity Index | nom: 1.9 |
Alloy Transfer | No Silicon and moderately Manganese alloying |
Flux Consumption
Volts | kg Flux / kg Wire DC+ | kg Flux / kg Wire AC |
26 V | 0.7 kg | |
30 V | 1.0 kg | |
34 V | 1.3 kg | |
38 V | 1.6 kg | |
26 V | 0.6 kg | |
30 V | 0.9 kg | |
34 V | 1.2 kg | |
38 V | 1.4 kg |
Amps | Dimensions | Travel speed |
580 A | Ø 4.0 mm | 55 cm/min |
Typical Mechanical Properties
Wire | Condition | Yield Strength | Tensile Strength | Charpy V-Notch | Elongation |
Spoolarc 75 | As Welded null | 550 MPa(76 ksi) | 655 MPa(89 ksi) | 149 J @ -40°C, (110 ft-lb @ -40 °F) | 28 % |
Spoolarc 81 | As Welded null | 425 MPa(62 ksi) | 515 MPa(75 ksi) | 50 J @ -62°C, (35 ft-lb @ -80 °F) | 30 % |
Spoolarc 81 | Stress Relieved 1 hr @ 621C (1150F) | 405 MPa(59 ksi) | 510 MPa(74 ksi) | 50 J @ -62°C, (35 ft-lb @ -80 °F) | 32 % |
Spoolarc 81 | Stress Relieved 8 hrs @ 621C (1150F) | 400 MPa(58 ksi) | 510 MPa(74 ksi) | 163 J @ -46°C, (120 ft-lb @ -50 °F) | 34 % |
Spoolarc ENi4 | As Welded null | 585 MPa(85 ksi) | 680 MPa(96 ksi) | 156 J @ -40°C, (115 ft-lb @ -40 °F) | 26 % |