Sandvik 20.25.5.LCuR (385-16) is a covered electrode with type with rutile-basic coating and normal recovery, used for welding of high-alloy austenitic stainless of UNS N08904 type, also known as 904L (e.g. Sandvik 2RK65).
Sandvik 20.25.5.LCuR (385-16) gives a fully austenitic chromium-nickel-molybdenum weld metal with especially low carbon content and copper addition. Spray transfer gives a bead with a finely rippled surface, little spatter and good slag removal.
- [ISO 3581] 20 25 5 Cu N L R
- [AWS A5.4/ASME SFA-5.4] E385-16
Contact your nearest sales office for full details.
Please note that the Werkstoff Nr. corresponds to the base material of the grade.
* nearest equivalent
Chemical composition (nominal) %
Sandvik 20.25.5.LCuR (385-16) is suitable for joining steels of the 20Cr/25Ni/4.5Mo/1.5Cu type such as 2RK65 and 904L used in many areas of the process industry, such as in the production of acetic acid, sulfuric acid, terephthalic or tartaric acid and vinyl chloride as well as other chloride containing media. It is also suitable for use in cooling operations involving sea water or heavily polluted river water.
Sandvik 20.25.5.LCuR (385-16) may also be used to join 317L where improved corrosion resistance in specific media is required.
These electrodes may be used to join 2RK65, 904L, and 317L to other grades of stainless steel.
Forms of supply
|Diameter, mm||Length, mm||Diameter, in.||Length, in.|
The electrodes are delivered in hermetically sealed metal cans.
|Temperature,||°C (°F)||20 (68)|
|Proof strength, RP0.2||MPa (ksi)||350 (51)|
|Tensile strength, Rm||MPa (ksi)||550 (80)|
|Impact strength (KV)||J (ft/lb)||65 (50)|
Resistant to intergranular corrosion according to DIN50914 and ASTM A262 practice E.
|Welding positions||Diameter <3.2 mm (~1/8 in.)||All except vertical down|
|Diameter >3.2 mm (~1/8 in.)||Preferably flat position|
|Current/polarity||Direct current/electrode positive or alternating current at an open circuit voltage of at least 70V|
|Diameter, mm (in.)||Current, A|
Redrying electrodes when necessary: 300°C (570oF)/2h
- Interpass Temperature: 150°C (300°F)
- Heat input: 1.0 kJ/mm (25 kJ/in.) max
|Electrode diameter mm (in.)||2.50 (~3/32)||3.2 (~1/8)||4.00 (~5/32)|
|Length, mm (in.)||300 (~12)||350 (~14)||350 (~14)|
|kg weld metal/h (approx.)||0.6||1.2||1.8|
|lb weld metal/h (approx.)||1.30||2.6||4.0|
|kg weld metal/kg electrodes||0.63||0.60||0.65|
|lb weld metal/lb electrodes||0.63||0.60||0.65|
|Electrodes/kg weld metal||80||51||32|
|Electrodes/lb weld metal||36||23||15|
|Burn-off time per electrode at max current, s||79||53||60|
|Weight/1000 pcs, kg (lb)||21 (46)||31 (68)||47 (103 )|