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Stainless Steel ER 309LSi


Technical Data Sheet

 

Chemical Composition Limits
Weight% C Mn Si Cr Ni S P Mo Cu
ER 309
ER 309LMo
0.03 max 1.0-2.5 0.65-1.00 23-25 12-14 0.03 max 0.03 max 0.75 max 0.75 max

Alloy ER 309LSi is of the same chemical composition as ER309L, with higher silicon content to improve the bead appearance and increase welding ease. This filler metal is used for welding of similar alloys in wrought or cast form. ER309LHiSil is mostly used for welding dissimilar materials such as mild steel to stainless steel, as well as for a barrier layer in stainless steel. The weld beads are exceptionally smooth due to good wetting.

Typical Mechanical Properties

Material Ultimate Tensile Strength Offset Yield Strength 0.2 % Elongation (%)
psi MPa psi MPa
ER 309/ ER 309LMo 82,650 570 59,450 410 38


Availability
Alloy ER 309/309LSi is a Stainless Steel TIG, MIG and SUB-ARC wire used for welding. For all stock availability contact Sales.

Specifications
AWS 5.9
ASME SFA 5.9
AWS ER 309LSi
UNS S30988

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.