Specialelektroder

A tin bronze electrode for welding copper and copper alloys, preferably tin bronze. The electrode is also suitable for welding on corrosion-resistant surface layer on steel. The electrode is also very useful for minor welding repairs of cast iron. When welding copper alloys, the workpiece must be preheated to approx. 300°C to facilitate melting of the joint surfaces, larger workpieces also require a continuous supply of heat. The electrode should be held perpendicular to the workpiece and welded without oscillation with a short arc.
Current type:
DC+
Electrode class:
DIN 1733: EL- CuSn7
Typical values ??of all-weld material:
Chemical composition %:
Mn: <0.5, P: <0.1, Cu : 92.5, Sn: 6.68, Fe: <0.2
Mechanical values/properties:
Tensile strength: 235 MPa
Break strength: 330-390 MPa< BR>Elongation (A4): 25%
Elongation (A5): 25%
Hardness untreated: 95 HB
Machinability: Good
Impact strength, KV:
Test temperature: +20°C, 0°C
Impact strength value: 25 J, 20 J
Approvals:
Sepros UNA 272581

Electrode for arc gouging and hole punching in all types of steel, cast iron and other metals with the exception of pure copper. The electrode sheath in the OK 21.03 develops a strong gas pressure, which blows away the molten material in front of the arc.
Applications:
The OK 21.03 is suitable for on-site arc gouging and when carbon arc gouging equipment is impractical. OK 21.03 is excellent for joint preparation when repairing cast iron, as it dries out and burns away impurities/graphite on the surface and thus reduces the risk of cracks and pores during welding. Arc gouging and manganese steel is another suitable application.
Welding current:
DC-, AV OCV 70 V
Procedure:
When arc gouging, connect the electrode usually to direct current minus pole or alternating current. Direct current plus pole is recommended for cutting and hole punching. The arc is ignited by holding the electrode perpendicular to the workpiece, after which the electrode must be tilted 15-20°C in relation to the workpiece and pushed forward.
Arc gouging speed 100-150 cm/minute depending on the thickness of the workpiece. If a deep groove is desired, repeat the procedure until the desired depth is achieved. Punching is very easy. Hold the electrode vertically, light the arc and lower the electrode until it cuts through the material. The hole can be enlarged by moving the electrode up and down like a saw. When using OK 21.03 indoors, good ventilation or smoke extraction is necessary.

An aluminum bronze electrode for gas metal arc welding. The alloy type is characterized by high strength, good wear resistance and very good corrosion resistance, especially in salt water. It is therefore widely used in the repair of propeller materials and for welding on steel surfaces where local improvement of corrosion resistance is desired, as well as for butt welding of steel against weldable copper alloys. Also intended for butt welding and welding of rolled and cast aluminum bronze alloys. When welding bronze in butt joints, the material should be chamfered for material thicknesses greater than 5-6 mm. Vertical welding is possible to a limited extent. When welding copper alloys, the workpiece must be preheated. Larger material thicknesses require a higher continuous heat supply to facilitate melting of the joint surfaces.
Shield gas:
Ar, Ar/He mixtures or He (I1-I3)
Type of current :
DC +
Electrode class:
SFA/AWS A5.7: ERCuAl-A1
EN 14640: S Cu 6100 (CuAl8)
Typical values ??of all-weld material:
Chemical composition %:
Si: <0.1, Mn: <0.5, Al: 7.8 , Fe: <0.5 Cu: bal.
Mechanical values:
Strength: 175 MPa
Breaking strength: 420 MPa
Elongation (A4): 40%< BR>Elongation (A5): 40%
Hardness untreated: 126 HV
Impact strength, KV:
Test temperature: +20°C
Impact strength value: 70 J
Approvals:

Silicon bronze electrode with good welding properties for gas metal arc welding of copper-silicon and copper-zinc based alloys and for MIG welding of galvanized sheet metal. OK Autrod 19.30 is alloyed with silicon and manganese and provides a durable and corrosion-resistant weld metal when welding on shafts and bearing surfaces of unalloyed and low-alloyed steel, as well as cast iron. The alloy was widely used for welding zinc-coated sheet metal in the automotive industry. High tensile strength and toughness are other good properties. Preheating and continuous heat supply of the workpiece (200-600°C) are generally required even for moderately coarse material thicknesses. The thicker the material, the higher the preheating and working temperature.
Shield gas:
Ar, Ar/He mixtures or He (I1-I3)
Current type:
DC+
Electrode class:
SFA/AWS A5.7: EN 14640
ERCuSi-A: S Cu 6560 (CuSi3Mn1)
Typical values on solid welds:
Composition of the wire %
Si: 3.4, Mn: 1.1, Cu: >94.0, Sn: <0.2, Zn: <0, 2, Fe: <0.3
Mechanical values:
Yield limit (ReL): 130 MPa
Break limit (Rm): 350 MPa
Elongation (A5): 40%
Impact strength, KV:
Test temperature/Impact strength value: +20°C/25 J
Approvals:
VdTÜV

Arc air gouging with carbon rod and compressed air is an effective process for cutting/chiseling away material in repairs and the like. The pre-coppered carbon rod is used to melt the material, while a powerful jet of compressed air blows away the melted material and at the same time has a cooling effect on the carbon rod. The method can be advantageously used when chiselling in unalloyed/alloyed steel, stainless steel, cast iron, etc. A complete arc air equipment consists of a joint torch with a flexible power cable/air hose that can be turned 360 degrees. There are three varieties of joint burner to choose from. Flair 600 for max 600A, Flair 1600 for max 1600A and K4000 for max 1000A.