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E 70 18 M
E 70 16 -1 HZ R
Guide to AWS A5.1: Carbon steel electrodes for SMAW
AWS
Classifi-
cation
Tensile Strength min. Yield Strength min. Elongation
min. %
Impact Energy
Charpy-V
J/°C
Welding
Position
Type of coating Type of Current
ksi MPa ksi MPa AC DC
E 6010 60 430 48 330 22 27 / –30 1 Cellulosic – +pol
E 6011 60 430 48 330 22 27 / –30 1 Cellulosic x +pol
E 6012 60 430 48 330 17 Not spec. 1 Rutile x – pol
E 6013 60 430 48 330 17 Not spec.. 1 Rutile x +/– pol
E 6019 60 430 48 330 22 27 / –20 1 Rutile/Acid x +/– pol
E 6020 60 430 48 330 22 Not spec. 2 Acid x c) +/– pol
E 6022 60 430 Not spec. Not spec. Not spec. Not spec. 2 Acid x – pol
E 6027 60 430 48 330 22 27 / –30 2 Acid, high recovery x c) +/– pol
E 7014 70 490 58 400 17
Not spec.
1 Rutile x +/– pol
E 7015 70 490 58 400 22 27 / –30 1 Basic – +pol
E 7016 70 490 58 400 22 27 / –30 1 Basic x +pol
E 7018 70 490 58 400 22 27 / –30 1 Basic x +pol
E 7018 M a) 490 b) b) 24 67 / –30 1 Basic – +pol
E 7024 70 490 58 400 17 Not spec. 2 Rutile, high recovery x +/– pol
E 7027 70 490 58 400 22 27 / –30 2 Acid, high recovery x c) +/– pol
E 7028 70 490 58 400 22 27 / –20 2 Basic, high recovery x +pol
E 7048 70 490 58 400 22 27 / –30 4 Basic x +pol
Covered electrode
for manual metal-arc
welding.
Designates an electrode (E 7018M)
for military requirements.Greater
toughness, low moisture level and
pick-up, and mandatory hydrogen
limits for weld metal.
Designates that the electrode meets the requirements of the
hydrogen test (optional for basic electrodes, as-received or
redried, with an average value not exceeding “z” ml of
H
2
/100 g deposited metal, where “z” is 4,8 or 16).
Designates that the electrode meets the
requirements of the moisture pick-up
test (optional for all basic electrodes
except E 7018M, for which the test is
mandatory)
Designates that the electrode
(E 7016, E 7018, E 7024) meets
the requirements for improved
toughness – and ductility (E 7024).
Designates min. tensile strength
in ksi.(1 ksi =1000 psi ~6.9 MPa.)
a) Nominal value 70 ksi (490 MPa)
b) Limits are 53-72 ksi (365-496 MPa)
For Ø 2,4 mm the limit is max. 77ksi (530 MPa)
c) H-V fillets: – pol
In addition there are requirements on:
•Chemical composition of the weld metal
•Radiographic tests
Designates welding position,
coating type and current type.
Code Welding position
1 All positions except vertical-down
2 Flat and H-V fillets
4 All positions but in the vertical, V-down only