OK 61.86

OK 61.86 is a niobium‑stabilized stainless steel stick electrode designed for welding 19Cr‑10Ni type steels where post‑weld heat treatment is required. It offers good corrosion resistance but requires careful procedure control to avoid hot cracking.

Key Features

• Niobium stabilised for improved performance on 19Cr‑10Ni steels
• Suitable for applications needing post‑weld heat treatment (max 400 °C)
• Low ferrite content (FN 4‑8) for enhanced corrosion resistance
• Vacuum‑sealed VacPac packaging to protect from moisture
• Available in 3.2 mm and 4.0 mm diameters with a range of amperage settings

Specifications

• classifications: EN ISO 3581‑A : E 19 9 Nb R 1 2; SFA/AWS A5.4 : E347‑17; Werkstoffnummer 1.4551
• welding_current: AC, DC+
• ferrite_content: FN 4‑8
• alloy_type: Austenitic CrNi
• min_ac_ocv: 50 V
• tensile_properties (as_welded): yield_strength 520 MPa, tensile_strength 660 MPa, elongation 35 %
• charpy_testing (as_welded): testing_temp 20 °C, impact_value 55 J
• typical_weld_metal_analysis_%: C 0.025, Mn 0.7, Si 0.8, Ni 10.4, Cr 19.0, N 0.09, Nb 0.35, FN_WRC‑92 5
• deposition_data:
  • 3.2 mm × 350 mm: amps 70‑120 A, volts 27 V, efficiency 55 %, fusion_time 62 s, deposition_rate 1.1 kg/h
  • 4.0 mm × 350 mm: amps 80‑170 A, volts 28 V, efficiency 54 %, fusion_time 64 s, deposition_rate 1.7 kg/h

Applications

• Welding of niobium or titanium‑stabilised stainless steels (19Cr‑10Ni)
• Projects requiring post‑weld heat treatment up to 400 °C
• Industries demanding high corrosion resistance such as chemical processing and petrochemical plants