WTh20- tungsten thorium

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Description

Notwithstanding the dangers that slightly radioactive electrodes may pose, many welders in Europe and Asia continue to swear by “their red” WTh20. Up to 4 percent by weight of thorium dioxide is added to alloys of the WTh type during production. Ignitability increases with a higher oxide content compared to pure tungsten. Thoriated tungsten is used wherever a stable electron exit is essential: in plasma spraying, electron beam sources and also welding. The electrode responds “good naturedly” to high amperages. But it must be handled with special caution: Vapours or fine dust produced during welding or while resharpening the electrode tip can cause health problems in the body. Implementing suitable safety measures (extraction) is very important in this case. Our company is Europe’s sole manufacturer authorised for tungsten-thorium production, which is also why we offer the only WTh electrodes that are 100% compliant with German quality standards.

Los datos sobre este material han sido proporcionados por Gesellschaft für Wolfram Industrie GmbH .

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

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Propiedades

General

Property	Temperature	Value	Comment
Densidad	23.0 °C	18 - 18.9 g/cm³ Show Supplier Material materials with Densidad of 18 - 18.9 g/cm³	(depends on the forming degree)

Mecánica

Property	Temperature	Value	Comment
Elongación	23.0 °C	6 % Show Supplier Material materials with Elongación of 6 %	Max.
Resistencia a la tracción	23.0 °C	1300 - 2200 MPa Show Supplier Material materials with Resistencia a la tracción of 1300 - 2200 MPa	at diameter 1.0–3.2 mm

Aplicaciones térmicas

Property	Temperature	Value	Comment
Coeficiente de dilatación térmica	23.0 °C	4.5E-6 1/K Show Supplier Material materials with Coeficiente de dilatación térmica of 4.5E-6 1/K	at 0–100°C
Conductividad térmica	23.0 °C	174 W/(m·K) Show Supplier Material materials with Conductividad térmica of 174 W/(m·K)

Eléctrico

Property	Temperature	Value
Resistividad eléctrica	27.0 °C	5.65E-6 Ω·m Show Supplier Material materials with Resistividad eléctrica of 5.65E-6 Ω·m
	227.0 °C	1.06E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 1.06E-5 Ω·m
	727.0 °C	2.49E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 2.49E-5 Ω·m
	1227.0 °C	4.04E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 4.04E-5 Ω·m
	1727.0 °C	5.67E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 5.67E-5 Ω·m
	2227.0 °C	7.39E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 7.39E-5 Ω·m
	2727.0 °C	9.2E-5 Ω·m Show Supplier Material materials with Resistividad eléctrica of 9.2E-5 Ω·m
	3227.0 °C	1.11E-4 Ω·m Show Supplier Material materials with Resistividad eléctrica of 1.11E-4 Ω·m

Chemical properties

Property	Value	Comment
Aluminio	2E-3 % Show Supplier Material materials with Aluminio of 2E-3 %	Max.
Arsénico	2E-3 % Show Supplier Material materials with Arsénico of 2E-3 %	Max.
Azufre	2E-3 % Show Supplier Material materials with Azufre of 2E-3 %	Max.
Calcio	2E-3 % Show Supplier Material materials with Calcio of 2E-3 %	Max.
Carbono	5E-3 % Show Supplier Material materials with Carbono of 5E-3 %	Max.
Cobalto	3E-3 % Show Supplier Material materials with Cobalto of 3E-3 %	Max.
Cobre	1E-3 % Show Supplier Material materials with Cobre of 1E-3 %	Max.
Cromo	2E-3 % Show Supplier Material materials with Cromo of 2E-3 %	Max.
Hierro	3E-3 % Show Supplier Material materials with Hierro of 3E-3 %	Max.
Magnesio	2E-3 % Show Supplier Material materials with Magnesio of 2E-3 %	Max.
Molibdeno	5E-3 % Show Supplier Material materials with Molibdeno of 5E-3 %	Max.
Níquel	2E-3 % Show Supplier Material materials with Níquel of 2E-3 %	Max.
Potasio	1E-3 % Show Supplier Material materials with Potasio of 1E-3 %	Max.
Silicona	3E-3 % Show Supplier Material materials with Silicona of 3E-3 %	Max.
Sodio	2E-3 % Show Supplier Material materials with Sodio of 2E-3 %	Max.
Thorium	1.8 - 2.2 % Show Supplier Material materials with Thorium of 1.8 - 2.2 %	as ThO2
Wolframio	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

WTh20- tungsten thorium

Description

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Usos

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Propiedades