resistance welding electrode caps

Spot Welding Electrodes

Expertise for the optimal weld, that helps end-users maximize their production efficiencies

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Our spot welding caps are used on robotic welding machines, primarily in automotive applications. 
A-Trode expander header icon

A-Trode® is the universal cap electrode for resistance welding of light-to-medium gauge coated and uncoated steels. 

A-Trode's freedom from oxygen allows us to alloy the copper with the optimum levels of chrome and zirconium.


Alloy: 

  • Copper Chrome Zirconium (CuCrZr)

Quality Specifications

Alloy
C18150 CuCrZr, EN ISO 5182 A2/2, 
DIN 17666 Wn 2.1293, RWMA Class II
Chemical composition
Cr 0.7% to 1.2%, Zr 0.06% to 0.15%. 
Others max. 0.2%, Cu balance
Physical material properties at 200C
Mass:  8.9g/cm3
Specific heat:  376 J/kg.K
Thermal conductivity:  320 W/m.K
Expansion coefficient (20-300oC):  17.0 x 10-6 m/mK
Electric conductivity:  min. 43 S/m
(solution annealed and hardened)  min 74% IACS
Softening temperature:  min. 500°C
Dimensions and tolerances
To ISO 5821 or other standards as required.
Special electrodes to customer drawing
PackagingMost items in cartons of 500 pieces. 
Documentation
Acceptance test certificate EN 10204 3.1 B 
possible if desired against a charge.
Area of application
Male and female resistance welding electrodes. 
Backing dies - series and indirect
Seam welding wheels
Projection welding electrodes 

 

Mechanical Specifications - Quality

Form of supply
Tensile strength [N/mm2] 
0.2% Offset yield strength [N/mm2] 
Elongation AS [%] 
Hardness 
Electrodes
≥ 490≥ 430≥ 15≥ 172

 

Physical Properties

Hardness at ambient temperature:Minimum 80 HRB
Conductivity:Minimum 80% IACS

 

 

H-Trode expander header icon

H-Trode® - the ideal cap electrode for resistance welding of 5000, 6000 and 7000 grade aluminum components.

The combination of advanced copper metallurgy and our cold-forming technology gives you an electrode that outperforms conventional electrodes when welding aluminum.

H-Trode's superior conductivity means that the maximum electrical resistance in an assembly is clearly between the aluminum sheets.  This reduces the heat generated between the sheets and electrode, which in turn reduces sticking.

Benefits:

  • Compatible with conventional spot welding equipment
  • Increased productivity
  • Cost-effective electrode for aluminum welding
  • High conductivity
  • Non-stick properties

Compatible with conventional spot welding equipment
Alternative welding solutions have been developed for aluminum, but equipment is expensive, large and more difficult to implement than conventional spot welding.  H-Trode electrodes enable stable spot welding of aluminum alloys using conventional spot welding equipment.

Increased productivity
Compared with alternative joining methods, spot welding using H-Trode electrodes and standard dressing equipment significantly increases productivity.

Most cost-effective electrode for aluminum welding
H-Trode's increased life expectancy, maintenance savgins and consistent quality welds assure you the highest return on your investment for welding aluminum.

Physical properties
All H-Trode electrodes are cold worked and most items are fully cold formed to ensure the maximum hardness.  H-Trode has a high-conductivity of minimum 92% IACS.

Luvata htrode

Nitrode expander header icon
The Nitrode® cap is a cold-formed alloy of dispersion strengthened copper with aluminum oxide. 

Nitrode demonstrates superior weld performance on a variety of steels. It resists mushrooming on the contact surface, allowing more welds before tip dressing, heat stepping or tip change.

No other cap electrode can match Nitrode for its cost-effective, high quality performance in resistance-welding applications.

Nitrode consistently outperforms copper chrome and copper chrome zirconium electrodes by resisting annealing.

 

Advantages

  • Longer weld life
  • Non-stick
  • Reduces energy requirements
  • Works on all steels
  • Lowers manufacturing costs

Specifications - Quality

AlloyC15760 CuAl2O3 1.1, EN ISO 5182 C20/1, RWMA Class 20
Chemical compositionAluminum 0.60% as Al2O3 1.1%  Cu balance
Physical material properties at 200CMass:  8.81g/cm3
Specific heat:  376 J/kg.K
Thermal conductivity:  322 W/m.K
Expansion coefficient (20-300°C):  16.6 x 10-6 m/mK
Electric conductivity:  min. 45 S/m
Solution-annealed and hardened:  min. 78% IACS
Softening temperature:  1083°C
Dimensions and tolerancesTo ISO 5821 or other standards as required. Special electrodes to customer drawing.
Packaging Most items in cartons of 500 pieces
DocumentationAcceptance test certificate EN 10204 3.1 B possible if desired against a charge.
Area of applicationMale and female resistance welding electrode
Backing dies - series and indirect
Projection welding electrodes

Mechanical Specifications - Quality

Form of supply
Tensile strength [N/mm2] 
0.2% Offset yield strength [N/mm2] 
Elongation AS [%] 
Hardness 
Electrodes
≥ 572≥ 544≥ 5 ≥ 164

 

Physical Properties

Hardness at ambient temperature:Minimum 75 HRB
Conductivity:Minimum 75% IACS

 

Traceability
All materials are fully traceable.  Nitrode® electrodes can be recognized by their single knurls markings.

Z-Trode expander header icon

Z-Trode® is the ideal cap electrode for resistance welding of light-to-medium gauge coated and uncoated steels and aluminum alloys.

Z-Trode is the electrode of choice for customers looking to reduce spatter in welding.  It is the zirconium copper welding electrode cap that outperforms conventional electrodes.

 

Advantages:

  • Prevents sticking
  • Resists mushrooming
  • Requires less energy
  • Reduces downtime

 

Quality Properties

AlloyC15000 CuZr, EN ISO 5182 A2/4, DIN 17666 Wn 2.1580, RWMA Class I
Chemical compositionZirconium 0.15% Cu balance
Physical material properties at 20°C Mass:  8.89g/cm3
Specific heat:  385 J/kg.K
Thermal conductivity:  367 W/m.K
Expansion coefficient (20-300°C):  16.9 x 10-6 m/mK
Electric conductivity:  min. 53 S/m
Solution-annealed and hardened:  min. 92% IACS
Softening temperature:  1083°C
Dimensions and tolerancesTo ISO 5821 or other standards as required. Special electrodes to customer drawing.
Packaging Most items in cartons of 500 pieces
DocumentationAcceptance test certificate EN 10204 3.1 B possible if desired against a charge.
Area of applicationMale and female resistance welding electrode
Backing dies - series and indirect
Projection welding electrodes

Mechanical Properties

Form of supply
Tensile strength [N/mm2

0.2% Offset yield strength

[N/mm2

Elongation AS [%] 
Hardness 
Electrodes
≥ 420≥ 379≥ 12 ≥ 132

 

Physical Properties

Hardness at ambient temperature:Minimum 65 HRB
Conductivity:Minimum 85% IACS

Traceability

All materials are fully traceable.  Z-Trode electrodes can be recognized by their flats around the periphery of the electrode cap.

Spatter Matters expander header icon

What's the matter with welding spatter?  Watch a video to learn more about why spatter matters.

 

Weld spatter occurs during spot welding when small liquid particles are expelled from the surface of the materials being welded together, due to all the pressure and heat. The flying molten metal (spatter) can cause a wide variety of problems that add unnecessary costs and risks.

Luvata's welding expertise is used to determine the exact welding cap electrode, that delivers the optimal weld.



 

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