inconel718 （inconel718 ）(UNS N07718) (W.Nr. 2.4668)(NC19FeNb)

1.inconel718 LIMITING CHEMICAL  COMPOSITION, %

2.inconel718 Introduction

Inconel alloy 718 is a precipitation-hardenable  nickel-chromium alloy also containing significant  amounts of iron, niobium and molybdenum along  with lesser amounts of aluminum and titanium.  It combines corrosion resistance and high  strength with outstanding weldability, including  resistance to post-weld cracking. The alloy has  excellent creep-rupture strength at temperatures  to 1300°F (700°C). Used in gas turbines, rocket  motors, spacecraft, nuclear reactors, pumps and  tooling. INCONEL alloy 718SPF is a special version  designed for superplastic forming.

3.inconel718 MAJOR  SPECIFICATIONS

4.inconel 718 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3

……………………………………………………………….0.296

g/cm3

………………………………………………………………. 8.19

Melting Point, °F

……………………………………………..2300 – 2437

Melting Point, °C

……………………………………………..1260 – 1336

Specific Heat, Btu/lb •°F

…………………………………………….0.104

J/kg •°C

…………………………………………………. 435

Curie Temperature, °F

…………………………………………………. -170

Curie Temperature, °C

………………………………………………… -112

Permeability at 200 Oersted (15.9 kA/m)

…………….. 1.0011

Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F

…….. 7.2

21 – 93°C, μm/m •°C

………… 13.0

Thermal Conductivity, Btu • in/ft2• h•°F

…………………………79

W/m•°C

…………………………………… 11.4

Electrical Resistivity, ohm • circ mil/ft

……………………….. 751

μΩ•m

………………………………………… 1.25

5.Inconel 718 TYPICAL MECHANICAL  PROPERTIES