Hardfacing Welding Electrodes
E Fe Cr-A1 - Isoarc 438

Characteristics
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.

Applications
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

Procedures
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.

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

Classifications
AWS EFeCr-A1
PRODUCT ISOARC 438
 
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