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E 62 7 MnNi B 3 4 H5 T
Covered electrode/
manual metal arc
welding.
Symbol Welding position
1 All positions
2 All positions, except vertical down
3 Flat butt weld, flat fillet weld, horizontal-vertical fillet weld
4 Flat butt weld, flat fillet weld
5 Vertical down and positions according to symbol 3
Symbol Impact Energy
Charpy-V
Temp °C for 47J min.
Z No requirements
A +20
0 0
2 –20
3 –30
4 –40
5 –50
6 –60
7 –70
8 –80
Symbol Metal recovery, % Type of current
1 <
105 AC +DC
2 <
105 DC
3 >105 <
125 AC +DC
4 >105 <
125 DC
5 >125 <
160 AC +DC
6 >125 <
160 DC
7 >160 AC +DC
8 >160 DC
Guide to EN ISO 18275-A: MMA electrodes for high strength steels
Symbol Yield Strength
min. N/mm
2
Tensile Strength
N/mm
2
Elongation
min. %
55 550 610-780 18
62 620 690-890 18
69 690 760-960 17
79 790 880-1080 16
89 890 980-1180 15
Symbol Hydrogen content,
ml/100 g deposited
weld metal, max.
H5 5
H10 10
H15 15
Symbol Chemical composition of all-weld metal , % *
Mn Ni Cr Mo
MnMo 1.4 - 2.0 – – 0.3 - 0.6
Mn1Ni 1.4- 2.0 0.6 - 1.2 – –
1NiMo 1.4 0.6 - 1.2 – 0.3 - 0.6
1.5NiMo 1.4 1.2 - 1.8 – 0.3 - 0.6
2NiMo 1.4 1.8 - 2.6 – 0.3 - 0.6
Mn1NiMo 1.4 - 2.0 0.6 - 1.2 – 0.3 - 0.6
Mn2NiMo 1.4 - 2.0 1.8 - 2.6 – 0.3 - 0.6
Mn2NiCrMo 1.4 - 2.0 1.8 - 2.6 0.3 - 0.6 0.3 - 0.6
Mn2Ni1CrMo 1.4 - 2.0 1.8 - 2.6 0.6 - 1.0 0.3 - 0.6
AZ ny other agreed composition
* If not specified C 0.03-0.10, Ni <0.3, Cr <0.2, Mo <0.2, V <0.05,Nb <0.05, Cu <0.3,
P <0.025, S <0.020, Si <0.80.
Single values shown in the table are maximum values.
Only basic electrode
covering.
Indicates mechanical
properties after stress
relief treatment.