WELDING ELECTRODE HARDFACING AWS DF2A-400-B "HYUNDAI"

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Korea (South)

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S-350B.B JIS Z3251 DF2A-400-B
For intermetallic abrasion, hardfacing of fans, upper rollers and sprockets.
Applications
Characteristics on Usage
Notes on Usage
Typical Chemical Composition of All-Weld Metal (%)
AC or DC+
Welding Position Current
Packet 5kg (11 lbs)
Carton 5kg (11 lbs) 4 : 20kg (44 lbs)
Approval
C Si Mn P S Cr
0.26 0.82 1.44 0.015 0.009 1.88
Sizes Available and Recommended Currents (Amp.)
Size mm (in)
Length mm (in)
F
V-up
2.6 (3/32) 3.2 (1/8) 4.0 (5/32) 5.0 (3/16) 6.0 (15/64)
350 (14) 350 (14) 400 (16) 400 (16) 450 (18)
55~90 90~140 140~190 190~240 220~300
50~80 80~130 110~170 - -
Machining is possible, in general. Hardness increases by quenching after machining.
It is suitable for intermetallic abrasion and moderate impact abrasion.
Preheating is unnecessary, in general, large weldments of hardening property should be
preheated.
In case of high cooling speed, preheat or postheat to prevent difficulty of machining causes
by hardening
Pay attention to blow hole at the arc starting.
Dry the electrodes at 350~400 (662~752 ) for 60 minutes before use.
Packing
Typical Mechanical Properties of All-Weld Metal
Preheat & Interpass
Postheat Heat Treatment. Hardness (HB)
Temp.
150 (302 ) - - 370
- - 650 (1202 )Tempering 280
- - 850 (1562 ), O.Q 470

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