Type of Covering: Extra low hydrogen, potassium, iron powder
Welding Position: F, H, HF, OH, V
Type of Current: DCEP or AC
Chemical Composition of Deposited Metal (%)
-
Standard
Typical
C
≤0.18
0.068
MN*
≤1.60
1.36
Si
≤0.75
0.51
S
≤0.035
0.010
P
≤0.035
0.016
Cr*
≤0.20
0.027
Ni*
≤0.30
0.006
Mo*
≤0.30
0.003
V*
≤0.08
0.016
The total amount of elements with * one should be≤1.75%
Mechanical Properties of Deposited Metal (AW)
-
Standard
Typical
Yield Strength
ReH (MPa)
ReH (MPa)
≥375
440
Tensile Strength
Rm (MPa)
Rm (MPa)
490-660
540
Elongation
A4 (%)
A4 (%)
≥22
30
Impact Value (J)
-20℃
≥47
170
-30℃
≥27
150
-46℃
≥27
130
The standard of mechanical properties conforms to shipping institutions and the certificate of inspection would follow it unless the purchaser has special requirement.
Diffusible hydrogen in deposited metal: ≤5ml/100g (mercury process)
X-ray radiographic inspection: Grade I
Sizes, Pieces & Recommended Current (DC+ or AC open circuit voltage ≥70V)
Size (mm)
Pieces (5kg)
Current (A)
F, H
V, OH
2.5 x 300
≈290
70-100
60-70
2.5 x 350
≈248
70-100
60-70
3.2 x 350
≈145
100-140
80-110
3.2 x 450
≈114
100-140
80-110
4.0 x 400
≈84
140-170
130-150
4.0 x 450
≈75
140-170
130-150
5.0 x 400
≈51
190-240
-
5.0 x 450
≈45
190-240
-
Approvals
Institute
Grade
CCS
4YH5
LR
3Ym, H15
ABS
4YH5
GL
4YHHH
DNV
4YH10
NK
4YH5
BKI
4YH10
KR
3YH10
CWB
E491T-9-H8
Notice:
1) The rod should be baked at 400℃ for 1-2 hours before use.
2) The surfaces to be welded must be cleaned away impurities of oil contamination, rust, moisture and so on.
3) Short Arc and narrow-gap welding is recommended