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Weld Star A31 TIG Welding Wire (ER 80S-D2) 1.0mm 5kg

£43.50 ex VAT

Further Reductions Available On Request 01276 505012

  • A31 TIG Filler Rods
  • UKCA Approved
  • 1.0mm 5kg
SKU: 3010300279 Categories: ,




A 5KG pack of Weld Star 1.0mm A31 TIG Rods for low alloy steel . Copper coated and heat resisting product which contains 0.5% Molybdenum (Mo) for increased tensile strength.

Weld deposits exhibit excellent quality and attractive bead appearance on carbon and low alloy steels. Suitable for operating at high currents giving a stable arc with a low amount of spatter. A31 (ER80S-D2) TIG filler wire can be used for single and multi pass welding requirements

The recommended working temperature is up to 500°C.  Typical uses include creep steels for construction steam boilers, pressure tanks, gas pipes, shipbuilding sector, petrochemical industry, heat exchangers, building of cranes and bridges.

A31 TIG wire has excellent mechanical properties including tensile strength of 670MPa and yield strength of 550MPa.  As a result of the difference between these two figures, the ductile nature of the wire is increased.  This is exhibited by its ability to endure twisting, misshaping and deforming without affecting the integrity of the finished weld. The wire has excellent elongation capabilities, with a breaking point of 24% increase to its original length.

Features & Benefits
  • Suitable for welding in all positions
  • Excellent quality weld deposits and attractive bead appearance.
  • Able to operate at high currents with minimal spatter.
  • Increased toughness due to the addition of Molybdenum(Mo).


What is creep resistance?

The term creep resistance refers to materials used in machines and facilities that are required to withstand high temperatures and high operating loads. Creep resistant materials must also be able to withstand the effects of high temperature corrosion. Furthermore, the term Creep can sometimes be referred to as cold flow.  Creep management is used in fields and applications such as nuclear power plants, jet engines, refineries and high capacity kilns.

What is the ER 80S-D2 Classification?

This is broken down into the following components: ‘ER’ is the abbreviation electrode or in this case filler wire. This is followed by the number 80 which represents the minimum tensile strength, in this case 80,000 PSI (Pounds per Square Inch). The ‘S’ indicates the wire is solid.  This may sometimes be represented as ‘C’ which advises the welding wire form is a composite.  Finally, the ending letter/number combination (in this case D2) refers to the combination of Manganese(Mn) and Molybdenum(Mo).  With Manganese(Mn) acting as the deoxidising agent.


Suitable for the following applications and industries:

  • Heat Exchangers
  • Building Cranes and Bridges
  • Petrochemical Industry
  • Marine Engineering and Shipbuilding
  • Gas Pipes
  • Pressure Tanks
  • Construction Steam Boilers
  • Nuclear Power Plant
  • Refineries

The above applications are not an exhaustive list.


Chemical Composition % (Typical)
C% Si% Mn% P% S% Cu%
0.09 0.70 1.90 <0.150 <0.150 <0.25
Cr% Ni% Mo% Al% V% Zr+Ti%
<0.15 <0.10 0.50 <0.200 <0.030 <0.50
Mechanical Properties (Typical)
Tensile Strength 670 MPa
Yield Strength 550 MPa
Elongation 24%
Impact Strength 70 J
Test Temperature -30ºC

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


EN ISO 636-A – W Z2Mo
AWS A5.28 – ER 80S-D2

Typical Base Materials

P235G1TH, P255G1TH, P310GH, 16Mo3, A255, A350, A612, A210, A333, A316, A369, A106*
* Illustrative, not exhaustive list

Shielding Gases

EN ISO 14175 – TIG: I1 (Argon)


Welding Positions

EN ISO 6947 – PA, PB, PC, PD, PE, PF

In Conclusion

A31 (ER80S-D2) low alloy steel TIG welding wire has an excellent combination of mechanical properties including good levels of toughness and high levels of ductility.  This wire will operate at high current, with minimal spatter. Due to the excellent elongation capabilities A31 wire has a breaking point of 24% increase to its original size.

Green wire is produced using virgin raw materials sourced from specialised steel mills, which ensures consistent reliability and quality.

Wire images are for illustration only.


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