Fire Pit Cover
ER90S-B3 is for welding 2 1/4 chrome, 1 moly steels, frequently piping in the petroleum industry and for elevated temperature service, Preheat is necessary and a post-weld heat treatment is usually required.
AWS Specification
A5.28 - 79
AWS Classification
ER90S-B3
Welding Current
GMAW-DCEP
according to this maybe wrong gas?
here is another thread on the topic
http://www.aws.org/cgi-bin/mwf/topic_show.pl?tid=8355Typical Wire Certification
C 0.08
Si 0.60
Mn 0.60
Cr 2.50
Mo 1.00
Typical Mechanical Properties (As Welded)
Yield Strength, psi . . . . . . . . . . . . 78,000
Tensile Strength, psi . . . . . . . . . . 90,000
% Elongation in 2" . . . . . . . . . . . . . . . 17
Welding Positions
All
Shielding Gas
CO2 or Ar/O2 mix
Available Diameters
Spooled: .035", & .045"
Operating Range in Diameters
.035" 100 - 150
.045" 150 - 200