HARD 700R
JIS Z3251 DF3B-600-R
DIN 8555 E6-UM-60-GPS
AWS A5.13 E Fe6
CHARACTERISTICS
•Wear Resistant, High Carbon Martensitic Steel Deposit
•Rutile Type, AC / DC Hard Surfacing Electrode
•For a Wide range Of General Hard Surfacing Applications, Such As Points, Tynes, Lips, Blades and Augers, Etc.
DESCRIPTION AND APPLICATIONS
HARD 700R is a smooth running, AC/DC electrode which deposits an air hardening martensitic steel alloy. HARD 700R deposits one of the hardest steel alloys available and is free from relief checks. It is suitable for a wide range of applications including the surfacing of post hole augers, agricultural points, shares and tynes, grader and cultivator blades and other components subject to fatigue or flexing during service.
DEPOSIT PROPERTIES
HARD 700R deposits an air hardening steel alloy which can be readily hot forged and offers good resistance to all types of abrasion under low to moderate impact conditions. In the “as welded” condition. HARD 700R weld metal cannot be machined without prior heat treatment.
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 100~150℃ for 30~60 minutes before use.
Welding Position:
Typical Chemical Compositon(Wt%):
C | Mn | Si | Cr | Mo | V | Fe |
0.45 | 0.42 | 0.9 | 8 | 0.4 | 0.45 | Bal |
Typical hardness of weld metal
SINGLE-LAYER ONTO MILD STEEL | 53- 56 HRC |
MULTI-LAYER | 55 - 60 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) | 400 | 400 | 400 |
Amp. | F | 100~ 150 | 140~ 200 | 170~250 |
• Recommended for DC + or AC (minimum 45 OCV) operation
