Page 213 - CITS - Welder - Trade Theory

WELDER - CITS

b) AWS A 5-23-1980 "Specification of low-alloy steel electrodes and fluxes for submerged arc welding". This
standard covers a fairly wide range of low alloy wires divided into five groups as carbon steel, carbon-
molybdenum steel, chromium-molybdenum steel, Nickel Steel and other low alloy steel. The ANNEXURE-2
describes the classification system. I For composition requirement for the electrode wire, the reader may go
through the latest specification. It must be pointed out that this standard deals with solid electrodes as well
as flux cored electrodes, the latter being referred to as composite electrodes. In the classification system
letter C is to be used after E to indicate a composite electrode.
c) IS 7280-1974 is the Indian standard specification for base wire electrode for submerged arc welding of
structural steels.
d) IS 3613-1974 is the Indian standard for acceptance tests for wire-flux combination for submerged arc
welding of structural steels.

Extension of table 3 to thicker plates
Plate Root Current
Speed
Thickness Opening Electrode Dia Amps Voltages Mm/Sec
Mm
V
T,Mm G,Mm Electrode +Ve
4.8 1.6 5 850 32 15
6.4 3.2 5 900 33 11
9.5 3.2 5.6 950 33 10
12.7 4.8 5.6 1000 34 8

Data For To-Pass Square Butt Weld One From Each Side

Plate Backing Pass Second Pass
Thickness Electrode Speed Current Speed
T,Mm Dia Current Voltage Mm Electrode Amps Voltage Mm

Mm Amps V Sec Dia Mm V Sec.
6.4 4.0 475 29 20 4.0 575 32 20

9.5 4.0 500 33 14 4.0 850 35 14
12.7 5.0 700 35 11 5.0 950 36 11

15.9 5.0 900 36 9 5.0 950 36 9
Data For 19 Mm And 25.4 Mm T Butt Welds
19 Mm T 25.4 Mm T

First Pass 5 5
Electrode Dia,. Mm 700 850
Current(DC+),Amp 35 35
Voltage,V 12 5.5
Speed,mm/Sec.
Second pass 5 5
Electrode dia,mm 950 1000
Current(DC+),amp 36 36
Voltage,V 6 7
Speed,mm/sec

200

CITS : C G & M - Welder - Lesson 61-76