Walsh Engineering Supplies, Ireland, Abrasives & Workshop Tools - leading suppliers > Welding > Welding Consumables > TIG Wire > Stainless Steel

Standard designations
EN ISO 14343
W 23 12 2 L
AWS A5.9
(ER309LMo) - Cr lower and Ni higher than standard.

Characteristics and welding directions
AVESTA P5 is a molybdenum-alloyed wire of the 309MoL type, which is primarily designed for surfacing low-alloy steels and in dissimilar welding between stainless steels and low-alloy steels ensuring a high resistance against cracking. It can also be used for welding high-strength steels such as HardoxÂ® and ArmoxÂ®. When used for surfacing, the composition is more or less equal to that of ASTM 316 from the first run.

Interpass temperature: Max. 150Â°C.

Heat input: Max. 2.0 kJ/mm.

Heat treatment:
Generally none. For constructions that include low-alloy steels in mixed joints, a stress-relieving annealing stage may be advisable. However, this type of alloy may be susceptible to embrittlement-inducing precipitation in the temperature range 550 â€“ 950Â°C. Always consult the supplier of the parent metal or seek other expert advice to ensure that the correct heat treatment process is carried out.

Structure: Austenite with 5 â€“ 10% ferrite.

Scaling temperature: Approx. 950Â°C (air).

Corrosion resistance: Superior to 316L. The corrosion resistance obtained on the first layer when surfacing corresponds to that of ASTM 316.

Approvals:
CE
DB
DNV
TÃœV

Shielding gas
Ar (99.95%) or Ar with an addition of 20 â€“ 30% helium (He) or 1 â€“ 5% hydrogen (H2). Gas flow rate 4 â€“ 8 l/min.

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