©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
V Carbon
0.025% Chromium
21.0%
Nickel 10.1%
Manganese
1.6% Silicon
0.75%
5.17.4
Core-Bright
309L (AWS
E309LTo-3)
- This was designed primarily for depositing
stainless steel overlay on carbon steel.
Can also be used for welding dissimilar steels. Typi-
cal chemical composition of the weld
metal is: Carbon
0.023% Chromium
24.0% Nickel
12.8% Manganese
1.6% Silicon
0.6% 5.17.5
Core-Bright
316L (AWS
E316LTo-3)
- is used to weld steel types 316, 316L and
318. The 2¼% molybdenum
increases the resistance to pitting corrosion from sulfur and
chloride acids. Used in the rayon,
dye and paper industries. Typical chemical composition of
the weld metal is:
Carbon 0.025%
Chromium 19.7%
Nickel 12.5%
Manganese 1.3%
Silicon 0.6%
Molybdenum 2.2%
5.17.6
Core-Bright
347 (AWS
E347LTo-3)
- This electrode is used to weld types 347,
304L, and 321 stainless steels where
the maximum corrosion resistance is required. It is also
used for high temperature high strength
welds. The typical chemical composition of the weld
metal is:
Carbon 0.028%
Chromium 20.2%
Nickel 10.1%
Manganese 1.5%
Silicon 0.7%
Molybdenum 0.57%
5.18 FERRITE
CONTENT
OF
CORE-BRIGHT
WELD
METALS
The ferrite content of Core-Bright
weld metal is variable depending upon the nitrogen content
of the weld deposit. Nitrogen
is a very strong austenite former, said to be 30 times as strong
as nickel. Only a small increase
in nitrogen causes a considerable decrease in ferrite content.
When welding with Core-Bright electrodes,
the arc length may be varied by the arc voltage. A
