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Symbol Coating type
A Acid
B Basic
C Cellulosic
R Rutile
RR Rutile (thick coated)
RC Rutile-Cellulosic
RA Rutile-Acid
RB Rutile-Basic
E 46 3 1Ni B 5 4 H5
Covered electrode
for 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
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 2560-A : MMA electrodes for non-alloyed and
fine grain steels
Symbol Tensile Strength
MPa
Yield Strength
min. MPa
Elongation
min. %
35 440-570 355 22
38 470-600 380 20
42 500-640 420 20
46 530-680 460 20
50 560-720 500 18
Symbol Hydrogen content,
ml/100 g deposited
weld metal, max.
H5 5
H10 10
H15 15
Symbol Chemical composition of all-weld metal , % *
Mn Mo Ni
No symbol 2.0 – –
Mo 1.4 0.3 - 0.6 –
MnMo 1.4 - 2.0 0.3 - 0.6 –
1Ni 1.4 – 0.6 - 1.2
2Ni 1.4 – 1.8 - 2.6
3Ni 1.4 – 2.6 3.8
Mn1Ni 1.4- 2.0 – 0.6 - 1.2
1NiMo 1.4 0.3 - 0.6 0.6 - 1.2
AZ ny other agreed composition
* If not specified Mo <0.2, Ni <0.3, Cr <0.2, V <0.05, Nb <0.05, Cu <0.3
Single values shown in the table mean maximum values.
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