Weld Star – ER 347Si Stainless TIG Wire (2.4mm) 5kg


£68.75 ex VAT £82.50 inc VAT

Product Model:
In Stock

  • Material: Austenitic stainless steel with niobium
  • Pack Size: 5 KG
  • Rod Diameter: 2.40 mm
  • AWS Code: ER 347Si
Share this product


Weld Star – ER 347Si Stainless TIG Wire (2.4mm) 5kg

Weld Star – ER 347Si Stainless TIG Wire is an austenitic stainless steel wire enriched with niobium. This composition provides resistance to intergranular chromium carbide precipitation, enhancing its resistance to intergranular corrosion. The increased silicon content ensures fluidity in the weld pool, resulting in a smooth deposit appearance. This wire is ideal for welding and overlaying chromium-nickel stainless steel base metals of similar composition, especially those stabilized by Nb or Ti, such as types 321 and 347. It finds its applications predominantly in the chemical industry, especially in high-temperature environments. This includes equipment intermittently heated within a temperature range of 400°C to 800°C. Other applications span across industries like food processing, dairy, oil, textile, and more.

Features and Benefits:

  • Niobium Presence: Offers resistance to intergranular chromium carbide precipitation.
  • Silicon Content: Promotes weld pool fluidity for a smoother deposit.
  • Versatile Applications: Suitable for welding chromium-nickel stainless steel base metals, especially types 321 and 347.
  • High-Temperature Resistance: Ideal for equipment heated within 400°C to 800°C.

Common Applications:

  • Chemical Industry: Used in equipment intermittently heated within 400°C to 800°C.
  • Food Processing: Suitable for the food processing industry.
  • Dairy, Oil, and Textile Industries: Finds applications in these industries.
  • Firewalls and Pressure Vessels: Ideal for constructing and repairing these structures.

Typical Base Materials

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

* Illustrative, not exhaustive list

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


Chemical Composition % (Typical)
C% Mn% Si% S% P%
0.020 1.74 0.82 0.005 0.024
Ni% Cr% Mo% Cu% Nb%
9.55 19.50 0.050 0.04 0.205


Mechanical Properties
Tensile Strength ≥550 MPa
Yield Strength ≥350 MPa
Elongation ≥25 %
Impact Strength ≥50 J

Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.

Shielding Gases

EN ISO 14175 – TIG: I1 (Argon)

Welding Positions

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

Liability: Whilst all reasonable efforts have been made to ensure the accuracy of the information contained, this information is subject to change without notice and can be only considered as suitable for general guidance.

A carriage charge is applied to orders, for standard 1-2 day shipments to mainland destinations within the United Kingdom. Other destinations and premium services are available but subject to additional freight charges.


There are no reviews yet.

Be the first to review “Weld Star – ER 347Si Stainless TIG Wire (2.4mm) 5kg”

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

You may also like…

  • Weld Star – ER 347Si Stainless TIG Wire – 1.6 mm x 2.5 Kg


    £45.44 ex VAT £54.53 inc VAT
  • Weld Star – ER 347Si Stainless TIG Wire – 1.6 mm x 5 Kg


    £88.07 ex VAT £105.68 inc VAT
  • Weld Star – ER 347Si Stainless TIG Wires – 1 mm x 5 Kg


    £100.23 ex VAT £120.28 inc VAT