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UNS-N07718-DIN-W-Nr-2-4668

UNS N07718 DIN W. Nr. 2.4668 Nickel Alloy Inconel 718 WIRE

UNS N07718 DIN W. Nr. 2.4668 Nickel Alloy Inconel 718 WIRE

UNS-N07718-DIN-W-Nr-2-4668

Inconel 718 spring temper wire

 

A Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700oC (1290oF). It has higher strength than Inconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 and Inconel X-750.

Good Mechanical Properties at Elevated Temperatures Yes
Corrosion Resistant at Ambient Temperatures Yes
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures Yes
Oxidation Resistant Yes
Precipitation Hardenable Yes

Applications include:

  • Gas Turbines
  • Rocket Motors
  • Space Craft
  • Nuclear Reactors
  • Pumps
Approximate Chemical Composition
Ni + Co 50 - 55%
Cr 17 - 21%
Fe BAL
Nb + Ta 4.75 - 5.5%
Mo 2.8 - 3.3%
Ti 0.65 - 1.15%
Al 0.2 - 0.8%
Properties
DENSITY 8.19 g/cm3 0.296 lb/in3
MELTING POINT 1336°C 2437°F
COEFFICIENT OF EXPANSION 13.0 µm/m °C 
(20 - 100°C)
7.2 x 10-6 in/in °F
(70 - 212°F)
MODULUS OF RIGIDITY 77.2 kN/mm2 11197 ksi
MODULUS OF ELASTICITY 204.9 kN/mm2 29719 ksi
CONDITION OF SUPPLY HEAT TREATMENT (AFTER FORMING)
No 1 Spring Temper/Spring Temper 1. Solution Anneal at 980oC (1800oF) for 1 hour and air cool
and
2. Age harden at 720oC (1330oF) for 8 hours and
furnace cool to 620oC (1150oF) and hold at 620oC (1150oF)
for a total age hardening time of 18 hours and air cool.
No.1 Spring Temper/Spring Temper
(NACE MRO175)
1. 1010oC (1870oF) 2 hours and air cool.
and
2. 790oC (1455oF) 6 hours and air cool.
CONDITION APPROX TENSILE STRENGTH APPROX SERVICE TEMPERATURE
Annealed 800 - 1000 N/mm2 116 - 145 ksi - -
No 1 Spring Temper 1000 - 1200 N/mm2 145 - 175 ksi - -
No 1 Spring Temper + Annealed + Aged 1250 - 1450 N/mm2 181 - 210 ksi -200 to +550oC -330 to +1020oF
Spring Temper 1300 - 1500 N/mm2 189 - 218 ksi - -
Spring Temper + Annealed + Aged 1250 - 1450 N/mm2 181 - 210 ksi -200 to +550oC -330 to +1020oF
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