Type

Brand

Color

Chemical Composition（％）

Sizes

(mm)

Surface

Features

Rare Earth

Impurities

W

Pure

tungsten

WP

Green

－

≤0.05

the rest

0.8~15

D,E

G,S

Non-radioactive;suitable for AC welding of aluminum, magnesium, and their alloy

Thoriated

tungsten

WTh10

Yellow

0.9~1.1ThO2

≤0.05

the rest

0.8~15

D,E

G,S

Excellent electron emission and overall performances; high current-carrying capacity; radioactivity; suitable for DC welding of carbon steel, stainless steel,nickel alloy and titanium alloy.

WTh20

Red

1.8~2.2ThO2

≤0.05

the rest

0.8~15

Lanthanum

tungsten

WLa10

Black

0.8~1.2La2O3

≤0.05

the rest

0.8~15

D,E

G,S

Non-radioactive;excellent electric conductivity and welding capacity; high current-carrying capacity; minimum ratio of burnt area; substitute for thoriated tungsten electrode; mainly used in DC welding.

WLa15

Golden

Yellow

1.3~1.7 La2O3

≤0.05

the rest

0.8~15

WLa20

Blue

1.8~2.2 La2O3

≤0.05

the rest

0.8~15

Cerium

tungsten

WCe10

Pink

0.8~1.2CeO2

≤0.05

the rest

0.8~15

D,E

G,S

Non-radioactive;easier arc initiation under low current circumstances, and low arc-maintaining current;suitable for the welding of pipelines,small components and discontinuous welding.

WCe15

Orange

1.3~1.7CeO2

≤0.05

the rest

0.8~15

WCe20

Grey

1.8~2.2CeO2

≤0.05

the rest

0.8~15

Yttrium

tungsten

WY20

Sky

Blue

1.8~2.2Y2O3

≤0.05

the rest

0.8~15

D,E

G,S

Non-radioactive;long and slim arc beam with high compression; deeper burning groove under medium and high current circumstances.

Compound

Rare Earth

tungsten

WMX

Cyan

1.0~5.0MOx

≤0.05

the rest

0.8~15

D,E

G,S

Compound rare-earth tungsten electrode; different additives contributing to better performance of tungsten electrode