OK Flux 10.71 is a neutral flux for single & multiple pass welding.
OK Flux 10.71 is a neutral, bonded flux intended primarily for multipass butt and fillet welding of carbon and low alloy steels. It combines outstanding welding performance with excellent weld properties. OK Flux 10.71 is suitable for use with AC and DC, single and multiwire systems at currents up to 1000 amps. It should not be used in applications where there is heavy rust or mill scale on the base plate. Among the many areas where OK 10.71 is used are general structural welding, bridge fabrication, heavy equipment fabrication, and line pipe welding.

| Typical Mechanical Properties | |
|---|---|
| As Welded | |
| Spoolarc 81 | |
| Tensile Strength | 81 ksi, 560 MPa |
| Yield Strength | 68 ksi, 470 MPa |
| Elongation in 2" | 30 % |
| CVN | 44 ft.-lbs., 60 J |
| Temperature | -40 °F, -40 °C |
| Spoolarc 29S | |
| Tensile Strength | 87 ksi, 600 MPa |
| Yield Strength | 73 ksi, 505 MPa |
| Elongation in 2" | 30 % |
| CVN | 30 ft.-lbs., 41 J |
| Temperature | -40 °F, -40 °C |
| Spoolarc 53 | |
| Tensile Strength | 91 ksi, 625 MPa |
| Yield Strength | 77 ksi, 530 MPa |
| Elongation in 2" | 28 % |
| CVN | 45 ft.-lbs., 61 J |
| Temperature | -50 °F, -46 °C |
| Spoolarc 75 | |
| Tensile Strength | 91 ksi, 625 MPa |
| Yield Strength | 78 ksi, 540 MPa |
| Elongation in 2" | 28 % |
| CVN | 43 ft.-lbs., 58 J |
| Temperature | -40 °F, -40 °C |
| Spoolarc 71 | |
| Tensile Strength | 87 ksi, 600 MPa |
| Yield Strength | 76 ksi, 525 MPa |
| Elongation in 2" | 27 % |
| CVN | 48 ft.-lbs., 65 J |
| Temperature | -20 °F, -29 °C |
| Stress Relieved 1 hr. @ 1150°F | |
| Spoolarc 71 | |
| Tensile Strength | 92 ksi, 635 MPa |
| Yield Strength | 74 ksi, 510 MPa |
| Elongation in 2" | 30 % |
| CVN | 38 ft.-lbs., 51 J |
| Temperature | -40 °F, -40 °C |
| Spoolarc 53 | |
| Tensile Strength | 79 ksi, 545 MPa |
| Yield Strength | 65 ksi, 448 MPa |
| Elongation in 2" | 32 % |
| CVN | 80 ft.-lbs., 108 J |
| Temperature | -50 °F, -46 °C |
| Stress Relieved 8 hrs. @ 1150°F | |
| Spoolarc 71 | |
| Tensile Strength | 91 ksi, 625 MPa |
| Yield Strength | 74 ksi, 510 MPa |
| Elongation in 2" | 30 % |
| CVN | 35 ft.-lbs., 47 J |
| Temperature | -40 °F, -40 °C |
| Typical Undiluted Weld Metal Analysis | |
| As Welded | |
| Spoolarc 81 | |
| C | 0.07 % |
| Mn | 1.50 % |
| Si | 0.50 % |
| P | 0.020 % |
| S | 0.011 % |
| Spoolarc 29S | |
| C | 0.06 % |
| Mn | 1.80 % |
| Si | 0.80 % |
| P | 0.014 % |
| S | 0.007 % |
| Spoolarc 53 | |
| C | 0.07 % |
| Mn | 1.80 % |
| Si | 0.50 % |
| P | 0.022 % |
| S | 0.010 % |
| Spoolarc 75 | |
| C | 0.07 % |
| Mn | 1.70 % |
| Si | 0.70 % |
| P | 0.016 % |
| S | 0.012 % |
| Ni | 0.90 % |
| Spoolarc 71 | |
| C | 0.06 % |
| Mn | 1.70 % |
| Si | 0.60 % |
| P | 0.018 % |
| S | 0.009 % |
| Part No. | Model / Product Description | UPC |
|---|---|---|
| 107100050A | OK FLUX 10.71 55#BG | 662303072438 |
| Basicity Index: | 1.6 |
| Chemical Composition: | |
| SiO2 + TiO2 | 20 |
| Al2 + MnO | 35 |
| CaO + MgO | 25 |
| Fluorides | 15 |
| Flux Consumption | |
| (lb. Flux / lb. Wire) | |
| Voltage | DC+ |
| 26 | 0.73 |
| 30 | 0.94 |
| 34 | 1.25 |
| 38 | 1.51 |
All listed prices are in U.S. dollars and represent the Manufacturer's Suggested Retail Price (MSRP) for sale in the United States. Actual selling price will be determined by the Distributor. Prices are subject to change without notice.