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Stainless Steel ER 309 / ER 309L

Technical Data Sheet

Chemical Composition Limits
Weight%	C	Mn	Si	Cr	Ni	S	P	Mo	Cu
ER 309 ER 309L	0.03 max	1.0-2.5	0.30-0.65	23-25	12-14	0.03 max	0.03 max	0.75 max	0.75 max

Alloy ER 309L is of similar composition as ER 309 except for the carbon content being lower than 0.03%. This lower carbon content reduces the possibility of intergranular carbide precipitation. This increases the resistance of intergranular corrosion without the use of stabilizers such as columbium (niobium) or titanium. Strength of this low-carbon alloy; however, may not be as great at elevated temperatures as that of the columbium (niobium)-stabilized alloys or ER309. ER 309L is preferred over ER 309 for cladding over carbon or low alloy steels, as well as for dissimilar joints that undergo heat treatment.

Typical Mechanical Properties

Material	Ultimate Tensile Strength		Offset Yield Strength 0.2 %		Elongation (%)
Material	psi	MPa	psi	MPa	Elongation (%)
ER 309/ ER 309L	85,550	590	58,000	400	40

Availability
Alloy ER 309/309L 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 309/309L
UNS S30983

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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.