UNS N07718, EN 2.4668, NiCr19Nb5Mo3

UNS N07718, EN 2.4668, NiCr19Nb5Mo3

Inconel 718 consists of Nickel, Chromium, Iron, Molybdenum with addition of Niobium, Titanium and Aluminium resulting in age hardening. It has excellent mechanical properties even at low temperatures. It can be easily fabricated into complex parts and it has an outstanding resistance to post weld cracking. It also has excellent resistance to creep and oxidation at high temperatures along with great fatigue strength in the age hardened condition.

CHEMICAL PROPERTIES

Ni Cr Fe C Mn Si Cu Mo Co Nb Ta Al Ti B P S Pb SE Bi
Min 50 17 Bal.         2.8   4.75   0.2 0.65            
Max 55 21   0.08 0.35 0.35 0.3 3.3 1 5.5 0.05 0.8 1.15 0.006 0.015 0.015 5 3 0.3
                                  ppm ppm ppm

PHYSICAL PROPERTIES

Desnsity [g/cm3]   8.80
Specific Heat [J/kg-K] 20°C 42.4
Electrical resistivity [μΩ . cm]   54.7
Thermal conductivity [W/m . K]   23.9
Average coefficient of thermal expansion [10-6/°C] 20~100°C 13.6
20~100°C 14.1
20~300°C 14.6
20~400°C 15.0
Young's modulus [MPa]   17.8 X 104
Melting range [°C]   1300~1350

MECHANICAL PROPERTIES

Forms & Condition Tensile Strength Yield Strength (0.2% Offset) Elongation, %Hardness
  Ksi MPa Ksi Mpa Brinell (3000 - Kg) Rockwell B
Rod and Bar              
Annealed 75-90 517-620 25-50 172-345 60-35 110-149 60-80
Cold-Drawn, Stress-Relieved 84-120 579-827 55-100 379-690 40-22 160-225 85-20C
Plate              
Hot-Rolled, As-Rolled 75-95 517-655 40-75 276-517 45-30 125-215 70-96
Hot-Rolled, Annealed 70-85 482-586 28-50 193-345 50-35 110-140 60-76
Sheet              
Annealed 70-85 482-586 30-45 207-310 45-35 - 65-80
Cold-Rolled, Hard 100-120 690-827 90-110 621-758 15-2   93 min.a
Strip, Cold-Rolled              
Annealed 70-85 482-586 25-45 172-310 55-35 - 68 max.a
Spring Temper 100-140 690-965 90-130 621-896 15-2   98 min.a
Tube and Pipe, Seamless              
Cold-Drawn, Annealed 70-85 482-586 25-45 172-310 50-35 - 75 max.a
Cold-Drawn, Stress-Relieved 85-120 586-827 55-100 379-690 35-15 - 85-100a
Wire, Cold Drawn              
Annealed 70-95 482-655 30-55 207-379 45-25 - -
Applications: Inconel 718 is mainly used for aerospace industry in aircraft turbine engines, liquid fuelled rockets, fasteners, instrumentation parts, springs and cryogenic tankage. It is also used for heat resistant tools in forgeries, extruders and separating shearers.

SIZE

Sheet Plate Bar Filler Wire
1MM - 3MM 3MM - 8MM 6MM – 250MM 1.2MM – 4MM
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