OK 94.25

OK 94.25 is a copper‑based stick electrode designed for welding copper and bronzes, especially tin‑bronzes, and can also be used for cladding steels and light repair of weldable cast irons.

Key Features

• Copper alloy (CuSn7) electrode with basic coating
• Suitable for DC+ welding
• Good tensile and impact properties
• Available in 2.5 mm, 3.2 mm and 4.0 mm diameters

Specifications

• Classification: EN ISO 17777 : E Cu Z (CuSn7)
• Welding Current: DC+
• Alloy Type: Copper alloy
• Coating Type: Basic
• Tensile (As Welded, ISO): Yield 235 MPa, Tensile 360 MPa, Elongation 25 %
• Charpy Impact (As Welded, ISO): 20 °C – 25 J, 0 °C – 20 J
• Typical Weld Metal Analysis (%): Mn 0.4, Cu 93, Sn 6.5
• Deposition Data (diameter × length, amps, volts, efficiency, fusion time, rate):
  • 2.5 × 350 mm: 60‑90 A, 22 V, 71 %, 39 s, 1.2 kg/h
  • 3.2 × 350 mm: 90‑125 A, 24 V, 72 %, 40 s, 1.9 kg/h
  • 4.0 × 350 mm: 125‑170 A, 25 V, 74 %, 41 s, 2.9 kg/h

Applications

• Welding of copper, tin‑bronze and other copper alloys
• Cladding of steel surfaces
• Repair of weldable cast irons
• General maintenance and repair tasks