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COATED ELECTRODES

Guide to EN 757-1997

Symbol Yield strength Tensile strength Elongation

min. MPa MPa min. % 55 62 69 79 89

550 620 690 790 890

610-780 690-890 760-960 880-1080 980-1180

18 18 17 16 15

Symbol

Welding positions

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.

Symbol Metal recovery, % Type of current 1 2 3 4 5 6 7 8

E 62

7

AC+DC DC AC+DC DC AC+DC DC AC+DC DC

≤105 ≤105 >105 ≤ 125 >105 ≤ 125 >125 ≤ 160 >125 ≤ 160 >160 >160

MnNI

B

3

Indicates mechanical

properties after stress relief treatment.

4

H5

T

3.01 Covered electrode/ manual metal arc welding.

Symbol Hydrogen content,

ml/100 g deposited

weld metal, max

Only basic electrode covering.

H5 H10

Symbol Impact Energy

Charpy-V

Temp °C for 47J min.

Z A 0 2 3 4 5 6 7 8

144

No requirements +20 0 -20 -30 -40 -50 -60 -70 -80

Symbol

Chemical composition of all-weld metal, %*

Mn

Mn Mo Mn 1Ni

1 Ni Mo

1.5 Ni Mo

2 Ni Mo

Mn 1 Ni Mo Mn 2 Ni Cr Mo Mn 2 Ni Mo Mn 2 Ni Cr Mo Z

1.4-2.0 0.3-0.6 1.4-2.0 0.6-1.2 1.4 0.6-1.2 0.3-0.6 1.4 1.2-1.8 0.3-0.6 1.4 1.8-2.6 0.3-0.6 1.4-2.0 0.6-1.2 0.3-0.6 1.4-2.0 1.8-2.6 0.3-0.6 1.4-2.0 1.8-2.6 0.3-0.6 0.3-0.6 1.4-2.0 1.8-2.6 0.6-1.0

0.3-0.6

Any other agreed composition

Ni

Cr

Mo

* 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. Single values shown in the table are maximum values.

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