Alloy 718 is a precipitation hardenable nickel-chromium alloy. As the major alloy elements are molybdenum, niobium + tantalum, aluminium and titanium, Alloy 718 gives exceptionally high yield, good corrosion resistance, tensile and creep rupture properties at temperatures up to 700°C (1300°F).
AI Materials supplies a range of material to meet most application uses – from material specifically treated for the oil industry to maximise resistance to stress corrosion cracking (hardness is limited to 40 HRC maximum) or treated to give maximum strength and high creep resistance and weldability. Ideal applications are in oil tools, such as gate valves, choke stems, etc. , and high strength applications such as fasteners and turbines.
We stock the following Specifications:
API6A 718
ASTM B637 – Chemistry only and NACE MR 01 75 – Solution Annealed and Aged to meet maximum Hardness of 40 HRC
AMS 5662 – Solution Annealed (capability to AMS 5663 – test piece)
AMS 5663 – Solution Annealed and Aged fully to achieve minimum hardness of 35.5 HRC
In the following Sizes:
| 12.7 mm | 15.87 mm | 16.25 mm | 19.05 mm | 22.22 mm |
| 25.4 mm | 28.575 mm | 31.75 mm | 35 mm | 38.1 mm |
| 44.45 mm | 47.625 mm | 50.8 mm | 57.15 mm | 70 mm |
| 75 mm | 76.2 mm | 88.9 mm | 90 mm | 95.25 mm |
| 101.6 mm | 127 mm | 130 mm | 132 mm | 139.7 mm |
| 140 mm | 152.4 mm | 164 mm | 177.8 mm | 203 mm |
| 228.6 mm | 232 mm | 241.3 mm | 242 mm | 265 mm |
| 304.8 mm |
We also have extensive experience of conversion and production of application-specific rings, discs and forgings in 718 material.
