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Description and Application

AMPCO-TRODE® 300 aluminum bronze bare filler rod is available for use with the gas tungsten arc welding process. The weld deposit has the highest yield strength and hardness (nominal 300 Brinell) of the AMPCO-TRODE® series. In addition to high hardness, the deposit also has excellent bearing and wear-resistance qualities.

These characteristics make this deposit adaptable for use in extreme bearing applications where very high pressures are encountered.

These characteristics – hardness, bearing properties and wear resistance all combine to make AMPCO-TRODE® 300 ideal for surfacing iron and copper-base materials. Dies overlaid with AMPCO-TRODE® 300 have surprising freedom from scratching and galling; die marks are almost completely eliminated.


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Typical Applications

Draw dies Wear shoes Wear strips
Slides Forming dies Wear plates
Cams Welding AMPCO® 25


Limiting Chemical Composition
% (filler metal)
Copper* Balance
Aluminum 14.0 – 15.0
Iron 3.0 – 5.0
Silicon 0.04 max.
Others 0.50 max.
* including silver
Mechanical Properties
(Nominal all-weld metal values)
Tensile Strength ksi 81 (558 MPa)
Yield Strength ksi 69 (476 MPa)
Elongation % in 2″ (51 mm) 0
Hardness (HBW 10/3000) on 1/4″ (6.4mm) deposit 370


AWS Class RCuAl-E
*Hardness will vary depending on quality of the weld and experience and knowhow of the welder.

Document Download

AMPCO-TRODE® 300 Technical Data Sheet