ER502
Class: ER502
AWS: A5.9
Conforms to Certification: AWS A5.9 | ASME SFA A5.9
AWS Chemical Composition Requirements
C = 0.10 max
Cr = 4.6 – 6.0
Ni = 0.60 max
Mo = 0.45 – 0.65
Mn = 0.60 max
Si = 0.50 max
P = 0.03 max
S = 0.03 max
Cu = 0.75 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
ER502 is used for welding 502 base materials, frequently tube or pipe. Preheating and post-weld heat treatment is required.
| Deposited Chemical Composition % (Typical) | ||
| C = 0.07 | Mo = 5.0 | P = 0.015 |
| Cr = 5.45 | Mn = 0.44 | S = 0.006 |
| Ni = 0.45 | Si = 0.04 | Cu = 0.20 |
| Mechanical Properties (R.T.) | |
| Yield Strength | 60,500psi |
| Tensile Strength | 78,500psi |
| Elongation | 32% |
Deposited All Weld Metal Properties
Data is typical for ER502 weld metal deposited by Mig using Argon + 2% oxygen as the shielding gas. Data on sub-arc is dependent on the type of flux used.
Recommended Welding Parameters |
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| 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 |
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| 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.