RW 309L - Nr.1.4332

RW 309L - Nr.1.4332Steel

RW 309L / RW 309SI / RW 309LSI / RW 309LMO / RW309H Stainless Welding Wire: 309 Series for Dissimilar Joints and Heat-Resistant Applications

RW 309L / RW 309SI / RW 309LSI / RW 309LMO / RW309H is a 309-series stainless welding wire class for joining stainless steels to carbon steels and other dissimilar materials.

Low Carbon Level and Silicon Addition RW 309L supports corrosion resistance; RW 309LSI adds improved fluidity, penetration and bead appearance.
Silicon Addition and Heat Resistance RW 309SI is suitable for heat-resistant steels and oxidizing gas environments with about 8% ferrite in the weld metal.
Molybdenum Addition and High Carbon Level RW 309LMO targets improved pitting resistance in chloride environments; RW309H is used where high-temperature performance is required.

RW 309L / RW 309SI / RW 309LSI / RW 309LMO / RW309H Stainless Welding Wire: References and Comparable Standards

Stainless welding wires references and comparable standards
Product Nominal Composition EN ISO 14343-B: 2017 AWS A5.9-2017
Alloy Designation
DIN Werkstoff Nr.
RW 309L 23 12 L SS309L ER309L 1.4332
RW 309SI - SS309Si ER309Si (1.4829)
RW 309LSI 23 12 L Si SS309LSi ER309LSi 1.4332
RW 309LMO 23 12 2 L - - (1.4459)
RW309H 22 12 H SS309 ER309 -

RW 309L / RW 309SI / RW 309LSI / RW 309LMO / RW309H Stainless Welding Wire: Chemical Composition (Cast Analysis) (%)

Stainless welding wires chemical composition values
Element RW 309L RW 309SI RW 309LSI RW 309LMO RW309H
C ≤ 0,03 % ≤ 0,12 % ≤ 0,03 % ≤ 0,03 % 0,04-0,15 %
Mn 1,00-2,50 % 1,00-2,50 % 1,00-2,50 % 1,00-2,50 % 1,00-2,50 %
Si 0,30-0,65 % 0,65-1,00 % 0,65-1,00 % 0,30-0,65 % 0,30-0,65 %
S ≤ 0,020 % ≤ 0,030 % ≤ 0,020 % ≤ 0,020 % ≤ 0,300 %
P ≤ 0,030 % ≤ 0,030 % ≤ 0,030 % ≤ 0,030 % ≤ 0,030 %
Cr 23,0-25,0 % 23,0-25,0 % 23,0-25,0 % 21,0-25,0 % 23,0-24,0 %
Ni 12,0-14,0 % 12,0-14,0 % 12,0-14,0 % 11,0-15,5 % 12,0-14,0 %
Mo ≤ 0,30 % ≤ 0,75 % ≤ 0,30 % 2,00-3,50 % 2,00-3,50 %
Cu ≤ 0,30 % ≤ 0,75 % ≤ 0,30 % ≤ 0,30 % ≤ 0,30 %
N - - - - -
Nb - - - - -
Ti - - - - -
Published: 01 January 2025 | Last Updated: 08 June 2026
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Published: 01 January 2025 | Last Updated: 08 June 2026
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