WELD STAR (NiCrMo-3) ALLOY 625 MIG FILLER WIRE 1.2MM 15KG SPOOL
AWS A5.14 – ER NiCrMo-3
A 15KG spool of Weld Star 1.2mm 625 MIG Welding Wire (NiCrMo-3). Specifically developed for welding and cladding alloys of a Nickel (Ni) based nature such as 625 or materials of a similar composition. Typically used for applications in harsh environments such as chemical process plants, marine engineering, and nuclear reactor plant components.
Available in diameters of 1.0 and 1.2mm.
Precision wound and layered for superior wire feeding characteristics.
Weld Star (NiCrMo-3) Alloy 625 MIG filler wire exhibits excellent mechanical properties within a wide working temperature range from cryogenic levels (-150°C to -273°C) up to 540°C. These properties include excellent resistance to the effects of stress corrosion and pitting. Combined with good levels of ductility allowing the weld metal to bend and misshape while still maintaining structural integrity in its finished state.
The key chemical composition of this wire is mainly made from a combination of Nickel (Ni), Chromium (Cr) and Molybdenum (Mo). Nickel (Ni) ensures increased levels of mechanical strength and impact toughness. Chromium (Cr) provides good levels of stability at high temperatures and corrosion resistance. In the case of Molybdenum (Mo), it also has increased strength levels, particularly at high temperatures. Additionally, it gives good corrosion resistance and high thermal conductivity.
Features & Benefits
- Excellent resistance to the effects of stress corrosion.
- Increased strength levels at high temperatures.
- Precision wound and layered for superior wire feeding characteristics.
- Good levels of Impact Toughness.
- High thermal conductivity.
- Wide working temperature range.
- Increased levels of ductility.
- Ideal for applications in harsh environments.
Applications / Industries
- Chemical Process Plants
- Marine Engineering
- Nuclear Reactor Plant Components
- Pump Shafts
- Aerospace Industry
- Weld overlay and spacers for heat recovery systems
- Furnace Muffles
- After-burners and combustion systems.
Stress Corrosion Cracking and Pitting?
Stress Corrosion Cracking (SCC) occurs when there is an increased level of tensile strength within the presence of a corrosive environment. As a result, the issue can have quite serious failure consequences, including a breakdown in component structures, which can lead to the appearance of brittle cracks. This type of corrosion will either form as Intergranular Stress Corrosion Cracking or Transgranular Corrosion Cracking:
- Intergranular Stress Corrosion Cracking (IGSCC) – is where the fracture occurs along the grain boundaries of the material.
- Transgranular Stress Corrosion Cracking (TGSCC) – is where the facture is formed through the grains of the material instead of along the grain boundaries.
The three factors that cause stress corrosion cracking are material, environment, and tensile stress. It is recommended to use a welding filler material such as 625 Alloy MIG wire as it has excellent resistance to this form of corrosion. Furthermore, it is advisable to reduce potential environmental dangers and limit the amount of tensile stress applied to materials.
Conversely, pitting is a more localised form of attack where tiny holes or craters appear on the metal surface. In particular, this issue is often likely to occur in the heat affected zone of welded joints. Because of the subtle nature of how this type of corrosion forms it is not always obvious it has taken hold until the level of damage is particularly severe. However, the best way to avoid the issue of pitting is by using a filler wire such as 625 Alloy.
EN ISO 6947 – PA, PB, PC, PD, PE, PF
|Tensile Strength||≥760 MPa|
|Yield Strength||≥415 MPa|
|Impact Strength||≥100 J|
Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.
EN ISO 14175 – I1, I3
Typical Base Materials
Inconel 601, Incoloy 800, Alloy 625, Alloy 825, Alloy 926*
* Illustrative, not exhaustive list
As noted above Weld Star Alloy 625 MIG Wire has an excellent range of mechanical properties particularly in the presence of harsh and corrosive environments. Combined with good levels of impact toughness and tensile strength. This MIG wire also exhibits great resistance to stress corrosion cracking and pitting even at high temperatures. Moreover, it also has outstanding ductile capabilities, allowing bending and misshaping without compromising the integrity of the finished weld. Designed to be used with similar base metals in a wide range of applications and industries.
Please note that these 15kg spools will not fit all of our MIG welders. If in doubt, please call and one of our team will happily advise.
Wire images are for illustration only.