Product Overview
MasterWeld MW-718 is a high-strength, age-hardenable nickel-chromium alloy filler metal designed for welding high-performance nickel alloys, including Alloy 718, 706 and X-750.
MW-718 combines excellent mechanical strength with high corrosion resistance and is suitable for demanding applications exposed to both cryogenic and elevated temperatures. The deposited weld metal offers excellent creep-rupture strength across a wide operating temperature range, from approximately -250°C up to 700°C.
- Product Name: MasterWeld MW-718
- Classification:
- ASME SFA A5.14: ERNiFeCr-2 (UNS N07718)
- EN ISO 18274: Ni 7718 - NiCr19Fe19Nb5Mo3
- Werkstoff-Nr.: 2.4667
- AMS: 5662, 5663, 5832, 5962
- Wire Type: Nickel Alloy Filler Metal
- Welding Processes: MIG (GMAW), TIG (GTAW)
Typical Chemical Composition (wt%)
| Element |
Content (%) |
| Carbon (C) |
0.08 max |
| Manganese (Mn) |
0.30 max |
| Silicon (Si) |
0.30 max |
| Sulphur (S) |
0.015 max |
| Phosphorus (P) |
0.015 max |
| Nickel (Ni) |
50.00 - 55.00 |
| Chromium (Cr) |
17.00 - 21.00 |
| Molybdenum (Mo) |
2.80 - 3.30 |
| Copper (Cu) |
0.30 max |
| Iron (Fe) |
24.00 max |
| Titanium (Ti) |
0.70 - 1.10 |
| Aluminium (Al) |
0.20 - 0.80 |
| Niobium + Tantalum (Nb+Ta) |
4.80 - 5.50 |
| Boron (B) |
0.006 max |
Values shown are for reference only.
Mechanical Properties
| Condition |
Tensile Strength (Rm) |
| Age-Hardened |
≥ 1140 N/mm² |
Reference heat treatment: Heat treated at 718°C for 8 hours, then furnace cooled at 56°C per hour to 620°C and held for 8 hours, followed by air cooling.
Mechanical property values are for reference only.
Key Applications
- Welding Alloy 718, 706 and X-750
- Aircraft and aerospace components
- Rocket and gas turbine engine components
- Cryogenic tanks
- Petrochemical applications
- Automotive applications
Key Features
- High-strength, age-hardenable nickel alloy filler metal
- Excellent mechanical strength and corrosion resistance
- Suitable for service from approximately -250°C to 700°C
- Excellent creep-rupture strength at elevated temperatures
- Excellent resistance to post-weld cracking
- Suitable for critical fabrication and repair applications
Packaging Options
| Welding Process |
Product Type |
Diameter |
Packaging Type |
Weight |
Length |
| MIG (GMAW) |
Filler Wire |
0.80 - 1.20mm |
BS300 / D300 Spools |
15kg |
N/A |
| TIG (GTAW) |
Filler Rod |
1.60 - 4.00mm |
Cardboard Boxes / Tubes |
5kg |
1000mm |
Other sizes and packaging types may be available upon request.
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MW-718 (ERNiFeCr-2) Nickel Alloy Welding Wire
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