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OK 68.15
SMAW
Type Basic
OK 68.15 is a stainless steel electrode which deposits a ferritic 13Cr weld metal. OK 68.15 is designed for welding steels of similar composition, when CrNi-alloyed austenitic stainless steel electrodes cannot be used, e.g. when the construction will be exposed to aggressive sulphuric gases.
Welding current, A
DC+
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| Classifications | Approvals | Typical all weld metal composition | Typical properties all weld metal | | EN 1600 | | E 13 B 4 2 | | SFA/AWS A5.4 | | E410-15 | | Werkstoff Nr. | | 1.4009 |
| | Sepros | UNA 409820 | |
| UDT | EN 1600 | |
| | C | <0,06 | | Si | <0,7 | | Mn | <1,0 | | Cr | 12,5 | | Ni | <0,6 | | Mo | <0,5 | | Cu | <0,2 |
| Redrying temperature, °C
200
Redrying time, hours
2
Recovery
108-118
Yield stress, MPa
370
Tensile strength, MPa
520
Elongation, %
25
Elongation, %
25
Tempering, °C/hours
750/1
| Charpy V | | Test temps, °C | Impact values, J | | +20 | 55 | | 0 | 35 | | -20 | 20 |
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| Diameter, mm | 2,5 | 3,2 | 4,0 | 5,0 | | Length, mm | 350 | 450 | 450 | 450 | | Arc voltage, V | 25 | 25 | 30 | - | | Welding current, A | 65-115 | 90-160 | 120-220 | 170-270 | | N. Kg weld metal/kg electrodes | 0,62 | 0,63 | 0,57 | - | | B. No. of electrodes/kg weld metal | 73 | 33 | 24 | - | | H. Kg weld metal/hour arc time | 1,0 | 1,5 | 2,0 | - | | T. Burn-off time, secs/electrode | 48 | 71 | 73 | - |
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