®COPYRIGHT
2000 THE ESAB GROUP, INC. LESSON
VI steels
may be welded successfully with this wire. The weld quality depends on the
degree of surface
impurities. This wire may be used for high current, high deposition welding
using argon mixed
with 5-10% oxygen or carbon dioxide. 6.5.6
ER70S-7
- This wire is similar to the ER70S-3 classification,
but it has a higher manganese
content which provides better wetting action and bead appearance. The tensile
and yield strengths are slightly higher,
and welding speed may be increased compared to the ER70S-3
type. This filler metal is usually recommended for use with argon-O2
shielding gas mixtures,
although argon-CO2 and
straight CO2 may
be used. The weld metal will be slightly harder
than that of the ER70S-3 types, but not as hard as an ER70S-6 deposit.
6.5.7
ER70S-G
- This classification may be applied to solid filler
metals that do not fall into
any of the preceding classes. It has no specific chemical composition or
shielding gas requirements,
but must meet all other requirements of the AWS A5.18-93 specification.
6.6 ESAB
BARE SOLID CARBON STEEL WIRES 6.6.1
Spoolarc
65 (AWS
Class ER70S-2)
- Spoolarc 65 is a cut length electrode avail-
able for a variety of tig and oxy-fuel
gas welding applications. In addition to the standard
deoxidizers, ER70S-2 also contains
additional cleaners such as aluminum, titanium, and zirconium.
This electrode is often used on out-of-position welding of pipe joints.
The ends of the
36" electrode can be flag tagged for identification purposes.
A. Typical
Chemical Analysis
of the
Wire Carbon
0.08% Phosphorus
0.011% Manganese
1.00% Sulfur
0.009% Silicon
0.40% B.
Typical
Mechanical Properties
of the
Weld Metal
As
Welded Stress
Relieved*
Yield Point, psi
67,500 62,500
Tensile Strength, psi
77,500 72,500
% Elongation (2")
31 33
% Reduction of Area
73 78
Charpy V-Notch Impacts
ft.-lbs. @-20°F
170 160
* 8
hrs. at 1150°F
