Class: ER316LSI

AWS: A5.9

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

Weld Process Used for Tig (GTAW)

AWS Chemical Composition Requirements
C = 0.03 max
Cr = 18.0 – 20.0
Ni = 11.0 – 14.0
Mo = 2.0 – 3.0
Mn = 1.0 – 2.5
Si = 0.65 – 1.00
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
ER316LSI affords the same characteristics as 316L. The high silicon allows better arc stability along with minimal post-weld grinding. The low carbon in the weld metal gives excellent assurance against intergranular corrosion.

Deposited Chemical Composition % (Typical)
C = 0.02	Mo = 2.50	P = 0.010
Cr = 18.50	Mn = 1.70	S = 0.013
Ni = 11.50	Si = 0.90

 

Mechanical Properties (R.T.)
Yield Strength	58,000psi
Tensile Strength	88,000psi
Elongation	37%
Reduction of Area	68%

Deposited All Weld Metal Properties
Data is typical for ER316LSI 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.