Class: ER347
AWS: A5.9
Conforms to Certification: AWS A5.9 ASME SFA A5.9
Weld Process Used for Mig (GMAW) and Submerged Arc (SAW)
AWS Chemical Composition Requirements
C = 0.08 max
Cr = 19.0 – 21.5
Ni = 9.0 – 11.0
Mo = 0.75 max
Mn = 1.0 – 2.5
Si = 0.30 – 0.65
P = 0.03 max
S = 0.03 max
Cu = 0.75 max
Nb = 10 x C (min) – 1.0 (max)
| Available Sizes | |
| Diameter X Spool Sizes | Diameter X Coil Sizes |
| .025 x 2#, 10#, 25# | 1/16 x 60# & mill coil |
| .030 x 2#, 10#, 25#, 30#, 33# | 5/64 x 60# & mill coil |
| .035 x 2#, 10#, 25#, 30#, 33# | 3/32 x 60# & mill coil |
| .045 x 2#, 10#, 25#, 30#, 33# | 1/8 x 60# & mill coil |
| 1/16 x 10#, 25#, 30#, 33# | 3/16 x 60# & mill coil |
| 5/32 x 60# & mill coil | |
Application
ER347 is recommended for welding AISI 347 and 321. The weld metal has good resistance to general corrosion. ER347 is suitable for applications where welds are subjected to high temperatures (+ 750ºF).
| Deposited Chemical Composition % (Typical) | ||
| C = 0.04 | Mo = 0.30 | P = 0.025 |
| Cr = 19.50 | Mn = 1.30 | S = 0.015 |
| Ni = 9.50 | Si = 0.40 | Cu = 0.10 |
| Nb = 0.40 | ||
| Mechanical Properties (R.T.) | |
| Yield Strength | 88,000psi |
| Tensile Strength | 58,000psi |
| Elongation | 42% |
Deposited All Weld Metal Properties
Data is typical for ER347 weld metal deposited by Mig using Argon + 2% oxygen as the shielding gas. Data on sub-arc is not presented, as sub-arc is dependent on the type of flux used.
| Recommended Welding Parameters | ||||||
| GMAW “Mig Process” | Reversed Polarity | |||||
| Wire Diameter | Wire Feed | Amps | Volts | Shielding Gas | Gas CFH | |
| Short Arc Welding | .030 | 13-26 | 40-120 | 16-20 | Argon+2% O2 | 25 |
| .035 | 13-26 | 60-140 | 16-22 | Argon+2% O2 | 25 | |
| Spray Arc Welding | .035 | 20-39 | 140-220 | 24-29 | Argon+2% O2 | 38 |
| .045 | 16-30 | 160-260 | 25-30 | Argon+2% O2 | 38 | |
| 1/16 | 10-16 | 230-350 | 27-31 | Argon+2% O2 | 38 | |
Other shielding Gases may be used for Mig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration
| Recommended Welding Parameters | ||
| SAW “Submerged Arc Welding Process” | Reversed Polarity Suggested | |
| Wire Diameter | Amps | Volts |
| 3/32 | 250-450 | 28-32 |
| 1/8 | 300-500 | 29-34 |
| 5/32 | 400-600 | 30-35 |
| 3/16 | 500-700 | 30-35 |
Both Agglomerated and fused fluxes can be used for submerged arc welding.
Note: The chemical composition of the flux mainly affects the chemistry of the weld metal and consequently its corrosion resistance and Mechanical properties.
