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E309LMo

AWS A5.4 E309L-16
ASME SFA 5.4 E309L-16

309LMo Low Carbon was developed for welding 22-27% Cr- 11-15% Mi – 2-3% Mo stainless steel, austenitic stainless steel containing molybdenum to mild or carbon steel and for welding ferritic steel plates clad with AISI 316 stainless steel. 309LMo yields an austenitic ferritic, crack resistant weld deposit that will provide corrosion resistance against sulfuric acid, phosphoric acid, etc. 309LMo weld deposits have a tensile strength greater than that of 309 or 309L. It is typically used for overlaying carbon steel giving weld deposits analogous to 316 stainless steel. The lower carbon reduces the possible inter-granular corrosion while increasing the ferrite content. 309Mo with higher Carbon may have slightly higher strengths and creep strengths at elevated temperatures.and inter-granular corrosion resistance superior to that of USA 309 electrodes. Typical applications are similar to those of E309, but where
stronger corrosion resistance is required.

TYPICAL WIRE CHEMISTRY (%) 

AWS Spec

ISO Spec

C

0.03

0.03

Cr

23.0-25.0

21.00-25.0

Ni

12.0-14.0

11.0 - 14.0

Mo

2.0-3.0

2.0 - 3.5

Mn

1.0-2.5

1.0 - 2.5

Si

0.30-0.65

1.0

P

0.03

0.03

S

0.03

0.02

Cu

0.75

0.75

TYPICAL MECHANICAL PROPERTIES OF WELD DEPOSIT (as welded)

Tensile strength (psi)

90 - 95

Yield strength (psi)

69 - 72

Elongation in 2"(%)

34-37%

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