HARD ARC 33
JIS Z3251 DFCrA-700B
DIN8555 E10-UM-60-GRZ
EN 14700 E Fe 14
Characteristics
•Hard, Wear Resistant Chromium Carbide Iron Deposit
•For Hard Surfacing Components Subject To Severe Abrasion And Heavy Impact
DESCRIPTION AND APPLICATIONS
HARD ARC 33 is a hard surfacing electrode that deposits very hard chromium carbides in an austenitic matrix. It is suitable for a wide range of surfacing applications where resistance to heavy abrasion and impact are required. The high chromium content (33%) make these electrodes deposits resistant to sea water corrosion and oxidation / spalling at elevated temperature up to 900˚C. Typical applications are in the earth moving and mining industries and include surfacing quarry screen plates, screen butt straps, chutes and shovel teeth / lips.
DEPOSIT PROPERTIES
HARD ARC 33 deposit are non-machinable, grindable, non-heat treatable and prone to relief cracking. The high chromium carbide, iron deposit is ideal for all types of abrasion under high impact loading. For maximum wear resistance two layers may be required.
Notes on usage
(1) Preheat at 150℃ and over in general.
(2) It is desirable to postheat at about 600℃ .
(3) In case of multi-layer build-up welding or welding mother plates with hardening property, under-lay with low hydrogen type electrodes for mild steel.
(4) Dry the electrodes at 300~350℃ for 120 minutes before use.
Welding Position:
Typical Chemical Compositon(Wt%):
Typical hardness of weld metal
SINGLE-LAYER ONTO MILD STEEL | 53-58 HRC |
MULTI-LAYER | 60- 65 HRC |
• Single layer deposit hardness may vary depending on base metal type and degree of dilution.
Size & recommended current range
Dia.(mm) | 3.2 | 4.0 | 5.0 |
L(mm) | 350 | 400 | 400 |
Amp. | F | 100~ 150 | 140~ 200 | 170~250 |
• Recommended for DC + or AC (minimum 55 OCV) operation
