- OA BK- 309L Mo
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OA 309L Mo is Used for joining stainless steel and difficult to weld steels and joining Cr/Ni/Mo steels with low carbon content (C<0.03%). Very good corrosion resistance. High strength and creep resistance at high temperatures. High fluidity. Regular and beautifully formed beads. Excellent X-ray quality.
A5.22 : E 309L Mo T0-4
12073 : T 23 12 2 L R C/M 3
C | Mn | Si | Cr | P | Ni | Fe |
0.04% | 0.5-1.5% | 0.6-1.5% | 24% | 0.02% | 12-15% | Bal. |
Mechanical Properties (As Welded)
Yield Strength N/mm² |
Tensile Strength N/mm² |
Elongation 5d (%) |
||
> 400 MPa |
> 580 MPa |
> 31% |
Mig/Mag welding (FCAW)
At Require
All (Except Vertical Down)
Remove all cracks and fatigued metal by grinding.
Diameter (mm) |
Voltage (V) | Current (A) |
1.6 | 20-30 |
180-320 |
2.4 | 26-32 |
200-400 |
2.8 | 29-32 |
350~450 |
Weld with low heat input.
Use a stick-out (distance from the contact tip to the extremity of the wire) of 20 to 50 mm (1-2") for open arc welding.
For a correct wire feed, use appropriate drive rolls for cored wire in the wire feeder and a water-cooled torch that is smoothly inclined.
Open arc welding Stick-out: 30 - 40 mm (1,18 - 1,57") Wire feed: 5m/min (197"per min) Remove all worn-out material. Preheat high carbon and low alloyed steel. When welding manganese steels, the temperature should remain below 300 °C (570 °F).
Remove all cracks and fatigued metal by grinding. The surface must be thoroughly cleaned from oil and grease