PRODUCTS : ALLOY 718
The following sizes are now available from stock for immediate delivery:
Solution Annealed (to AMS 5662 with AMS 5663 capability results)
28.575 MM
35 MM
38.1 MM
50.88 MM
Solution Annealed and Aged (to NACE with a maximum hardness of 40 HRC
12.7 MM
15.875 MM
19.05 MM
22.225 MM
25.4 MM
31.75 MM
44.45 MM
47.625 MM
50.8 MM
63.5 MM
76.2 MM
101.6 MM
12.7 MM
139.7 MM
152.4 MM
203.2 MM
We can convert to AMS or NACE to any size up to 177.8 mm dia.
** OTHER SIZES IN PRODUCTION - PLEASE ASK FOR CURRENT AVAILABILITY **
A precipitation hardenable nickel alloy. Because the major alloy elements are molybdenum, niobium + tantalum, aluminium and titanium, the alloy has a combination of high strength and good corrosion resistance when the alloy is precipitation hardened. Alloy 718 gives exceptionally high yield, good corrosion resistance, tensile and creep rupture properties at temperatures up to 700°C (1300°F).
Alloy 718 can either be vacuum induction melted (VIM) followed by vacuum arc remelting (VAR) or electro-slag remelted (ESR), or electric arc melted, argon oxygen degassed (AOD) followed by double VAR. Heat treatment varies according to the application (aerospace material requires maximum strength for operation at high temperature whereas material destined for oil and gas applications is limited to a maximum hardness of 40HRC in order to ensure it is resistant to stress corrosion cracking).
Alloy 718 can be annealed and welded without spontaneous hardening during heating and cooling, and has excellent weldability compared to other nickel-based superalloys hardened by aluminium and titanium.
Extensively used in jet engine, high-speed airframe parts and high temperature application nuts, bolts and fasteners.
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