Tungsten Electrodes

Type

Brand

Color

Chemical Composition£¨£¥£©

Sizes (mm)

Surface

Features

Rare Earth

Impurities

W

Pure Tungsten

HW11

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

HWTh10

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.

HWTh20

Red

1.8~2.2ThO2

≤0.05

the rest

0.8~15

Lanthanum Tungsten

HWLa10

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.

HWLa15

Golden Yellow

1.3~1.7 La2O3

≤0.05

the rest

0.8~15

HWLa20

Blue

1.8~2.2 La2O3

≤0.05

the rest

0.8~15

Cerium Tungsten

HWCe10

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.

HWCe15

Orange

1.3~1.7CeO2

≤0.05

the rest

0.8~15

HWCe20

Grey

1.8~2.2CeO2

≤0.05

the rest

0.8~15

Yttrium Tungsten

HWY20

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

HWMX

Cyan

1.0~5.0MOx

≤0.05

the rest

0.8~15

D,E G,S

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