WLa10 - tungsten lanthanum

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Description

Next to the WTh alloy, the WLa alloy is the most versatile. With a lanthanum (III) oxide content of up to 2 percent by weight, this mixture can be used for a very broad range of applications: electrodes for TIG, orbital, plasma and resistance welding, and many more. Once again: the higher the oxide content, the better the ignition of the electrode. Thanks to its low alloy content, the WLa10 electrode is also suitable for AC welding of aluminium and magnesium. This alloy type is therefore the favourite WTh20 replacement in Europe.

This material data has been provided by Gesellschaft für Wolfram Industrie GmbH .

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

18 - 18.9 g/cm³

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(depends on the forming degree)

Mechanical

PropertyTemperatureValueComment

Elongation

23.0 °C

6 %

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Max.

Tensile strength

23.0 °C

1300 - 2200 MPa

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at diameter 1.0–3.2 mm

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

4.5E-6 1/K

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at 0–100°C

Thermal conductivity

23.0 °C

174 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

27.0 °C

5.65E-6 Ω·m

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227.0 °C

1.06E-5 Ω·m

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727.0 °C

2.49E-5 Ω·m

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1227.0 °C

4.04E-5 Ω·m

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1727.0 °C

5.67E-5 Ω·m

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2227.0 °C

7.39E-5 Ω·m

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2727.0 °C

9.2E-5 Ω·m

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3227.0 °C

1.11E-4 Ω·m

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Chemical properties

PropertyValueComment

Aluminium

2E-3 %

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Max.

Arsenic

2E-3 %

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Max.

Calcium

2E-3 %

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Max.

Carbon

5E-3 %

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Max.

Chromium

2E-3 %

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Max.

Cobalt

3E-3 %

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Max.

Copper

1E-3 %

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Max.

Iron

3E-3 %

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Max.

Lanthanum

0.9 - 1.2 %

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as La2O3

Magnesium

2E-3 %

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Max.

Molybdenum

5E-3 %

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Min.

Nickel

2E-3 %

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Max.

Potassium

1E-3 %

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Max.

Silicon

3E-3 %

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Max.

Sodium

2E-3 %

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Max.

Sulfur

2E-3 %

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Max.

Tungsten

balance

Technological properties

Property
Application areas

Non melting electrode for TIG welding; Electrodes for lightning; Electrodes for plasma cutting and welding and thermal spraying; Cathodes for electronic tubes, wires in different electric applications

Processing history

Heat treatment: annealed, unannealed

Surface Finish

ground, drawn (black/cleaned), hammered