Lincoln Electric D1.8 User Manual page 21

The requirements for Demand Critical welds are the most rigorous. Filler metals that meet D1.8 requirements
for Demand Critical welds will automatically meet all the requirements for welds that are on the SFRS but
not Demand Critical. For consistency and simplicity, Lincoln Electric suggests that filler metals that meet the
requirements for Demand Critical be used on all welds made on the SFRS. This simple practice will eliminate
the possibility of using an unacceptable product on a Demand Critical weld.
Lincoln Electric filler metals for D1.8 Demand Critical welds all meet the following requirements:

AWS A5 yield, tensile, elongation and CVN requirements for classification


AISC Seismic Provision requirements of 20 ft•lbf @ -20°F.


D1.8 Annex A high/low heat input testing requirements (40 ft•lbf @ 70°F), or A5.20 optional

"-D" designator requirements, or are exempted from high/low heat input testing.

D1.8 diffusible hydrogen limits (applicable to FCAW-G, FCAW-S, GMAW, GMAW-C and SAW)


For FCAW-G and FCAW-S, D1.8 extended exposure time of at least one week when tested in

accordance with Annex E. Some products have been tested to time periods exceeding one week.
See applicable exposure test results.

For FCAW-G and FCAW-S, ProTech


For suggested FCAW-S, common intermix combinations (D1.8 Annex B).

Lincoln Electric additionally produces a variety of filler metals meeting D1.8 requirements where an 80 ksi
tensile strength deposit is required. Contact your Lincoln Electric technical representative for additional
information on these products.
foil bag protective packaging (D1.8 clause 6.4.1).
®
D1.8 Seismic Supplement Welding Manual
www.lincolnelectric.com
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