Abrafil 309L

Abrafil 309L

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Product description

Austenitic stainless steel wire with high chromium (~23%) and nickel (~13%) content, low carbon content (“L” = Low Carbon) and no added silicon. This wire has specific properties that are highly sought-after in certain applications.

Product application instructions

ALLOY UNS DIN W – Nr.
309 S30900 X15 CrNiSi 20 12 14.828
– – G – X25 CrNiSi 20 14 1 4832
304 S30400 X5 CrNi 18 10 14.301
304L S30403 X2 CrNi 18 11 14.306
305 J92701 G – X10 CrNi 18 8 14.312
304LN S30453 X2 CrNiN 18 10 14.311
– J92602 G – X25 CrNiSi 18 9 14.825
– J92603 G – X40 CrNiSi 22 9 14.826
– – X10 CrAl 13 14.724
– – X10 CrAl 18 14.742
– – X10 CrSi 6 14.712

  • Stainless steel connection ↔ mild steel (e.g. 304 ↔ S235)

  • Chemical, petrochemical and food industries

  • Manufacture of boilers, furnaces, heat exchangers and industrial chimneys

  • Repairs or hardfacing of carbon steels subject to oxidation

Classification

AWS A5.9 DIN 8556 Werkstoff Nr.
ER 309L SG-X2 CrNi 24 12 1.4332

Chemical analysis (%)

C If Mn Cr Ni P S
0.02 0.4 1.8 23.5 13.5 < 0,020 < 0,015

Mechanical characteristics

Rm (MPa) Rp0.2 MPa A5 (%) Av - ISO - V
540 440 30 65 J : + 20°C

Why choose ABRAFIL 309L?

1. Ideal for heterogeneous welds (stainless steel ↔ carbon or low-alloy steel)

  • Thanks to its high Cr and Ni content, ABRAFIL 309L acts as a buffer layer between very different materials.

  • Avoids metallurgical problems (brittle zones, cracking) when welding mild steel to stainless steel.

2. High resistance to oxidation and corrosion

  • Good resistance to hot corrosion, oxidation up to ~1000°C, and wet corrosion in moderate environments.

  • For use in areas exposed to alternating heat/cold or oxidizing environments.

3. Low carbon = resistance to intergranular corrosion

  • The “L” (< 0.03% C) prevents the precipitation of chromium carbides in the heat-affected zone (ZAT).

  • Recommended for applications where intergranular corrosion resistance is essential.

4. Si-free version = for critical welds or post-weld treatment

  • Silicon is often added to improve bath fluidity, but it also increases sensitivity to hot cracking.

  • The Si-free version is used when :

    • The aim is to improve ductility or temperature resistance.

    • The aim is to avoid over-enriched Si zones during post-weld heat treatments.

    • We work on food, chemical or nuclear parts where impurities must be kept to a minimum.