Class: ER320LR

AWS: A5.9

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

Weld Process Used for Tig (GTAW)

AWS Chemical Composition Requirements
C = 0.025 max
Cr = 19.0 – 21.0
Ni = 32.0 – 36.0
Mo = 2.0 – 3.0
Mn = 1.5 – 2.0
Si = 0.15 max
P = 0.015 max
S = 0.02 max
Cu = 3.0 – 4.0
Nb = 8 x C (min) – 0.4 (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
ER320LR has a composition similar to ER320, except that carbon, silicon, phosphorus, and sulfur levels are kept at a lower level. The low melting residuals are limited in this alloy to reduce micro fissuring. This alloy is often used for welding type ER320 stainless steels.

Deposited Chemical Composition % (Typical)
C = 0.015	Mo = 2.50	P  = 0.007
Cr = 19.60	Mn = 1.60	S = 0.007
Ni = 34.10	Si = 0.05	Cu = 3.40
Nb = 0.25

 

Mechanical Properties (R.T.)
Yield Strength	86,000psi
Tensile Strength	57,500psi
Elongation	35%

Deposited All Weld Metal Properties
Data is typical for ER320LR 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.