OK 86.28 SMAW
Type Zirconium-basic EFeMn-A
Description
OK 86.28 is a high-recovery, austenitic-manganese
steel electrode containing nickel. It produces
a crack-resistant weld metal, which workhardens
under compressive stresses.
It is intended for surfacing and building up Mnsteel
components exposed to severe impact and
moderate abrasion. Typical applications include
crusher plates and rolls, bulldozer teeth, cones
and mantels of rotary crushers, dredger buckets,
rail crossings and so on.
The interpass temperature should be kept as low
as possible.
Welding current
AC, DC+ OCV 70 V
12
Classifications
SFA/AWS A5.13 EFeMn-A
Typical all weld metal composition,

C Si Mn Ni
0.8 <0.3 14.0 3.5
Typical mech. properties all weld metal
Weld metal hardness, a w 160-180 HB
(no preheat, interpass
temperature 100- 150°C)
Weld metal hardness, w h 42-46 HRC
(approx. 25 reduction)
Machinability Grinding
(overheating must be avoided)
Impact resistance Excellent
Approvals
DB 20.039.05
Sepros UNA 409820
Deposition data at max current
Diameter,
mm
Length,
mm
Welding
current, A
Arc voltage,
V
N.
Kg weld
metal/kg
electrodes
B.
No. of electrodes/
kg
weld metal
H.
Kg weld
metal/hour
arc time
T.
Burn-off
time, s/
electrode
3.2 450 100-160 30 0.54 26.5 1.5 90
4.0 450 130-210 30 0.54 17.5 2.0 105
5.0 450 170-300 31 0.56 11.0 2.9 114