OK 67.55

OK 67.55 is a basic coated stick electrode designed for welding duplex stainless steels (UNS S31803) where high mechanical properties are required.

Key Features

• Basic coated electrode for duplex stainless steel
• VacPac hermetically sealed packaging for moisture protection
• Available in multiple diameters and lengths
• High tensile and impact properties

Specifications

• Classifications: EN ISO 3581-A : E 22 9 3 N L B 2 2, SFA/AWS A5.4 : E2209-15, Werkstoffnummer : 1.4462
• Approvals: DNV‑GL Duplex, VdTÜV 06774
• Welding Current: DC+
• Ferrite Content: FN 35‑50
• Alloy Type: Austenitic CrNiMo
• Coating Type: Basic
• Yield Strength: 650 MPa (As Welded)
• Tensile Strength: 800 MPa (As Welded)
• Elongation: 28 % (As Welded)
• Impact Value: 100 J at 20 °C, 85 J at –20 °C, 75 J at –40 °C, 65 J at –60 °C (As Welded)
• Typical Weld Metal Composition: C 0.04 %, Mn 1.0 %, Si 0.7 %, Ni 9.1 %, Cr 23.2 %, Mo 3.2 %, N 0.15 %
• Deposition Data:
  • 2.5 × 300 mm: 50‑80 A, 23 V, 59 % efficiency, 0.8 kg/h
  • 3.2 × 350 mm: 65‑115 A, 24 V, 59 % efficiency, 1.2 kg/h
  • 4.0 × 350 mm: 80‑140 A, 24 V, 60 % efficiency, 1.5 kg/h

Applications

• Welding of duplex stainless steel structures
• Projects demanding high strength and corrosion resistance
• Fabrication where flexibility of SMAW is essential