What is the UNS N07718 specification?
Nickel Alloy 718 (INCONEL 718) | UNS# N07718
Nickel Alloy 718 (UNS# N07718) or Inconel 718 is a precipitation hardened nickel-chromium alloy containing molybdenum, iron, niobium and small amounts of aluminum and titanium. Designed to exhibit significant yield strength, high strength, good ductility, and creep-rupture properties up to 1300°F (704°C). These properties give Alloy 718 good formability, weldability, and cryogenic margins compared to other nickel-base high-temperature alloys. The slow age-hardening properties of Alloy 718 also allow for annealing and welding during heating and cooling without spontaneous hardening. This alloy is also non-magnetic and has significant corrosion and oxidation resistance, allowing it to be used in applications such as jet engines, airframe components, and high-temperature bolts and fasteners.
Nickel Alloy 718 Stock Size Range:
Round Bar (Diameter): 0.250"/6.35mm – 14.000"/355.6mm
Nickel Alloy 718 Round Bar
718 Nickel Alloy Round Bar Specifications:
AMS 2261, AMS 5662, AMS 5663, AMS 5664, AMS 5708, AMS 5962
AMS Applicable: AMS 5663, AMS 5664, AMS 5909
ASME SB446, ASME SB637
NACE API 6A718, NACE Per MR 0175
ASTM B446, ASTM B637
| Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ni 52.5% | Cr 19.0% | Mo 3.05% | C | Nb 5.035% | |||||
| Mn | Si | P | S | Cu | |||||
| Co | |||||||||
| PHYSICAL PROPERTIES | |||||||
|---|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat (BTU/lb-°F) | Thermal expansion (1/°F) | Thermal expansion | Melting Point (°F) | |
| 0.296 | 1.38 | 77 | 0.104 | 7.22E-06 | – | 2300 | |
| Mechanical Properties | ||
|---|---|---|
| Property | Minimum | Maximum |
| Yield Strength Range (Rp0.2 Offset) (ksi) | 80 | 150 |
| Tensile Strength Range (Rm) (ksi) | 14 | 220 |
| Elongation (AL=5 x Ø) | 18% | 27% |
| Brinell Hardness (H) | 102 | 331 |
| Modulus of Elasticity (ksi) (E): 29600 | ||
| Machineability General Index: 12% | ||
