Guide to EN ISO 2560-A : MMA electrodes for non-alloyed and
fine grain steels
Symbol
35
38
42
46
50
Tensile Strength
MPa
Yield Strength
min. MPa
Elongation
min. %
440-570
470-600
500-640
530-680
560-720
355
380
420
460
500
22
20
20
20
18
Symbol
3
Welding position
1
2
3
4
5
All positions
All positions, except vertical down
Flat butt weld, flat fillet weld, horizontal-vertical fillet weld
Flat butt weld, flat fillet weld
Vertical down and positions according to symbol 3
Type of current
Metal recovery, %
1
2
3
4
5
6
7
8
E 46
Symbol
<105
<105
105 <125
105 <125
125 <160
125 <160
>160
>160
1Ni
Covered electrode
for manual metal arc
welding.
AC +DC
DC
AC +DC
DC
AC +DC
DC
AC +DC
DC
B
5
Symbol
A
B
C
R
RR
RC
RA
RB
Symbol
Coating type
Acid
Basic
Cellulosic
Rutile
Rutile (thick coated)
Rutile-Cellulosic
Rutile-Acid
Rutile-Basic
Impact Energy
Charpy-V
Temp °C for 47J min.
Z
A
0
2
3
4
5
6
No requirements
+20
0
–20
–30
–40
–50
–60
H5
Symbol
Hydrogen content,
ml/100 g deposited
weld metal, max.
H5
H10
H15
5
10
15
Chemical composition of all-weld metal , % *
Mn
Symbol
4
No symbol
Mo
MnMo
1Ni
2Ni
3Ni
Mn1Ni
1NiMo
Z
2.0
1.4
1.4 - 2.0
1.4
1.4
1.4
1.4 - 2.0
1.4
Mo
–
0.3 - 0.6
0.3 - 0.6
–
–
–
–
0.3 - 0.6
Any other agreed composition
Ni
–
–
–
0.6 - 1.2
1.8 - 2.6
2.6 - 3.8
0.6 - 1.2
0.6 - 1.2
* 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.
265