©
COPYRIGHT 1998 THE ESAB GROUP, INC. Section
Nr.
Section
Title Page
TABLE OF CONTENTS
LESSON IV COVERED
ELECTRODES FOR WELDING LOW
ALLOY STEELS 4.1
LOW
ALLOY STEELS ......................................................................
1 4.2
Consequence
of Hydrogen in Low Alloy Steel ..................................
1 4.2.1
Preheat .............................................................................................
3 4.3
MANUFACTURING
LOW HYDROGEN ELECTRODES ..................
3 4.3.1
Storage
and Reconditioning..............................................................
4 4.3.2
Moisture
Resistant Coating ...............................................................
4 4.4
AWS
SPECIFICATION FOR LOW ALLOY ELECTRODES..............
5 4.4.1
Effect
of Alloying Elements ...............................................................
6 4.4.2
Mechanical
Properties (AWS A5.5-96) .............................................
7 4.4.3
Impact
Properties..............................................................................
8 4.5
SELECTING
THE PROPER LOW ALLOY ELECTRODE ................
8 4.5.1
Service
Conditions ............................................................................
8 4.5.2
Joint
Design ......................................................................................
9 4.5.3
Equipment.........................................................................................
10 4.6
LOW
HYDROGEN IRON POWDER ELECTRODES .......................
11 4.6.1
Atom
Arc 7018 (AWS E7018) ...........................................................
11 4.6.2
Atom
Arc 7018 Mo (AWS E7018-A1)................................................
11 4.6.3
Atom
Arc 8018N (AWS E8018-C2) ...................................................
12 4.6.4
Atom
Arc 8018CM (AWS E8018-B2) ................................................
13 4.6.5
Atom
Arc 8018W (AWS E8018-G)....................................................
13 4.6.6
Atom
Arc 9018CM (AWS E9018-B3) ................................................
14 4.6.7
Atom
Arc 9018-B3L (AWS E9018-B3L) ............................................
14 4.6.8
Atom
Arc 10018 (AWS E10018-M) ...................................................
15 4.6.9
Atom
Arc 10018MM (AWS E10018-D2) ...........................................
15 4.6.10
Atom
Arc 12018 (AWS E12018-M)....................................................
16
