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Description and Application

AMPCO-TRODE® 250 aluminum bronze bare filler rod is available for use with the gas tungsten arc welding process. The weld deposit has a nominal hardness of 250 Brinell and has higher yield strength and hardness than AMPCO-TRODE® 200 with lower tensile strength and ductility typical of the aluminum bronzes.

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

AMPCO-TRODE® 250 is primarily used for overlay welding in applications where unusual wear-resistant qualities increase the service life of wearing parts.


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Typical Applications

Wear shoes Chafing plates Clutch fingers
Screw conveyors Forming dies Sleeves
Cams Welding AMPCO® 22


Limiting Chemical Composition
% (filler metal)
Copper* Balance
Aluminum 13.0 – 14.0
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 78 (538 MPa)
Yield Strength ksi 56 (386 MPa)
Elongation % in 2″ (51 mm) 0
Hardness (HBW 10/3000) on 1/4″ (6.4mm) deposit 340


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

Document Download

AMPCO-TRODE® 250 Technical Data Sheet