2.4mm 347Si TIG Filler Weld Star Pack 5Kg

2.4mm 347Si TIG Filler Weld Star Pack 5Kg

Stock Code: FAW00039870
Manufacturer Part No: 6011100362
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£70.00 (exc VAT) per Pack
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TIG Wire for Stabilised Austenitic Stainless Steels

Weld Star ER 347Si TIG wire is an austenitic stainless steel filler metal featuring a significant niobium content that prevents intergranular chromium carbide precipitation, enhancing resistance to intergranular corrosion. The increased silicon content improves weld pool fluidity, resulting in a smooth, attractive weld deposit.

It is ideal for welding and overlay applications on chromium-nickel stainless steels of similar composition, especially those stabilised by niobium or titanium, such as types 321 and 347.

Commonly used in chemical industry applications operating at elevated temperatures, especially equipment exposed intermittently between 400°C and 800°C. Typical uses include firewalls, pressure vessels, food processing, dairy, oil, and textile industries.

Key Features

  • Niobium addition stabilises against intergranular chromium carbide precipitation
  • Increased silicon content for improved weld fluidity and smooth appearance
  • Suitable for welding/stabilised overlay of 300 series stainless steels (e.g., 321, 347)
  • Excellent performance at elevated temperatures (400°C - 800°C)
  • Resists intergranular corrosion

Typical Applications

  • Chemical industry equipment
  • Firewalls and pressure vessels
  • Food processing and dairy industries
  • Oil and textile industries

Typical Base Materials

  • 300 series austenitic stainless steel, particularly 321 and 347 (stabilised)

Standards

  • EN ISO 14343-A – W 19 9 Nb Si
  • AWS A5.9 – ER 347Si

Chemical Composition % (Typical)

Element

Typical %

C

0.020

Mn

1.74

Si

0.82

S

0.005

P

0.024

Ni

9.55

Cr

19.50

Mo

0.050

Cu

0.04

Nb

0.205

Mechanical Properties (Typical)

  • Tensile Strength: ≥550 MPa
  • Yield Strength: ≥350 MPa
  • Elongation: ≥25%
  • Impact Strength: ≥50 J

Properties may vary depending on shielding gas, welding parameters, and base materials.

Shielding Gas

  • EN ISO 14175 – I1 (Argon)

Welding Positions

  • EN ISO 6947 – PA, PB, PC, PD, PE, PF, PG

 

Diameter2.4
Wire Classification347Si: Stabilized St/St to St/St
BrandWeld Star
Weight5Kg

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