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AMPCO-CORE® 250 is an aluminum bronze flux core wire for use with the Gas Metal Arc Welding process.

AMPCO-CORE® 250 is primarily an overlay filler metal. The characteristics of this filler metal make the deposit adaptable for use in those extreme bearing applications where very high pressures are encountered operating against hardened steel surfaces.

AMPCO-CORE® 250 often use for overlaying in applications where it unusual wear-resistant qualities increase service life of wearing parts.

This material data has been provided by AMPCO METAL.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts




Recycled Content

80 %

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Hardness, Brinell

23.0 °C

250 [-]

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(3000 kg), Three layer deposit on mild steel

Chemical properties



11.5 %

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Balance, including silver


4 %

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Technological properties

Application areas

Welding: Friction plates, Bearings, Sliders, High speed bearings, Forming dies


AMPCO-CORE® 250 is available from stock in two diameters: 0.045” (1.2mm) and 0,062” (1.6mm). Both sizes are available in 12″ (300mm) spools weighing 33lb (15 kg) each. Other diameters are available upon request.

Processing methods

Welding position and deposits: The flat welding position is recommended. Backhand (trailing) welding is preferred rather than forehand (pushing) to make either stringer or weaved beads.

Shielding gas: 100% Argon

Current typeGas flow rateIntensity [A]Voltage [V]Stick-out [inch (mm)]
DC+ (DCEP)25 – 46 cfh (12-22 L/min)0.045″ (1.2 mm) 200-300
0.062″ (1.6 mm) 360-400
All diameters 28-30All diameters 5/8-1″ (15-25)