®COPYRIGHT
2000 THE ESAB GROUP, INC. LESSON
VI MAJOR ALLOYING
ELEMENTS - % BY WEIGHT AWS
CLASS CARBON
MANGANESE SILICON
TITANIUM ZIRCONIUM
ALUMINUM ER70S-2
0.07 0.90
- 1.40 0.40 -
0.70 0.05 - 0.15
0.02 - 0.12 0.05
- 0.15 ER70S-3
0.06 - 0.15 0.90
- 1.40 0.45 -
0.70 —
— —
ER70S-4 0.07
- 0.15 1.00 -
1.50 0.65 - 0.85
— —
— ER70S-5
0.07 - 0.19 0.90
- 1.40 0.30 -
0.60 —
— 0.50
- 0.90 ER70S-6
0.07 - 0.15 1.40
- 1.85 0.80 -
1.15 —
— —
ER70S-7 0.07
- 0.15 1.50 -
2.00 0.50 - 0.80
— —
— ER70S-G
NO CHEMICAL REQUIREMENTS
CHEMICAL COMPOSITION - CARBON STEEL
BARE WIRES FIGURE
5 6.4.0.5
Tensile strength requirements of the
weld metal produced by the filler metals in this classification
are shown in Figure 6. Tensile
Yield Shielding
Strength Strength
Elongation AWS
Class Gas
PSI PSI
in 2" - % Min.
ER70S-2 ER70S-3
ER70S-4 ER70S-5
CO2
72,000 60,000
22 ER70S-6
ER70S-7 ER70S-G
* 72,000
60,000 22
* As agreed upon between supplier
and purchaser WELD
METAL TENSILE REQUIREMENTS FIGURE
6 }
Minimum AWS
Class Impact
Properties ER70S-2
20 ft-lb @ -20° F
ER70S-3 20
ft-lb @ 0° F ER70S-4
Not Required
ER70S-5 Not
Required ER70S-6
20 ft-lb @ -20° F
ER70S-7 20
ft-lb @ -20° F ER70S-G
As agreed between
supplier & purchaser
WELD METAL IMPACT PROPERTIES
FIGURE 7 6.4.0.6
Although Figure 6 shows CO2
as the shielding gas, the specification does not restrict
the use of argon-CO2 or
argon-mixtures. It states that
a filler metal classified
with CO2 will also
meet specification
requirements when used with the
above gas mixtures. 6.4.0.7
Impact properties, according to
the Charpy V-notch test as listed
in the specification,
are shown in Figure 7.
