Class: ER502

AWS: A5.9

Conforms to Certification: AWS A5.9            ASME SFA A5.9

Weld Process Used for Tig (GTAW)

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
.030 x 36
.035 x 36
.045 x 36
1/16 x 36
3/32 x 36
1/8 x 36
3/16 x 36
5/32 x 36

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 Tig using 100% Argon as the shielding gas.

Recommended Welding Parameters
GTAW “Tig Process”
Wire Diameter	Amps DCSP	Volts	Shielding Gas
.035	60-90	12-15	Argon 100%
.045	80-110	13-16	Argon 100%
1/16	90-130	14-16	Argon 100%
3/32	120-175	15-20	Argon 100%

Note: Parameters for tig welding are dependent upon plate thickness and welding position.
Other shielding Gases may be used for Tig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration.