Hardfacing Welding Electrodes
E Fe Cr-A1 - Isoarc 438

This electrode is easy to use on AC or DC positive polarity. Bead appearance is good, and deposits are non-heat treatable. Hardness is maintained at elevated temperatures. ISOARC 438 restrikes well. The self releasing slag should be removed after each pass.

ISOARC 438 is used extensively in the mining, earthmoving, crusher and mineral industries. All parts subject to high wear due to abrasive environments are protected by ISOARC 438

Keep the arc short and hold it at approximately 70 degrees to the work piece. Keep deposits to a maximum of three layers. Use ISOARC 168 as a buffer if additional layers are required. Do not weave more than three times the diameter of the electrode.

Hypereutectic, with chromium hexagonal primary carbides in an Austenitic matrix.

Mechanical Properties
COMPOSITION Copper and Chromium
HARDNESS >RC 60 + after second layer. Hardness depends on amperage settings and base metal dilution
Chemical Analysis
Carbon 3.5-4.5
Manganese 4.0-6.0
Silicone 0.5-2.0
Chromium 20.0-25.0
Molybdenum <0.5

Welding Position

Diameter Length Current Pack Mass Item No
3.2 350mm 130 - 150A 4kg EL43832
4.0 350mm 160 - 180A 4kg EL43840
5.0 350mm 170 - 220A 4kg EL43850