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Inconel 718 is a Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700°C (1290°F). It has higher strength thanInconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 andInconel X-750.
Chemical Composition of Inconel 718
The compositional range for Inconel 718 is provided in the table below.
Element
Content
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 %
Typical Properties of Inconel 718
Typical properties of Inconel 718 are covered in the following table.
Property
Metric
Imperial
Density
8.19 g/cm3
0.296 lb/in3
Melting point
1336 °C
2437 °F
Co-Efficient of Expansion
13.0 µm/m.°C (20-100 °C)
7.2×10-6 in/in.°F (70-212 °F)
Modulus of rigidity
77.2 kN/mm2
11197 ksi
Modulus of elasticity
204.9 kN/mm2
29719 ksi
Properties of Supplied Materials and Heat Treated Materials
Condition of Supply
Heat Treatment (After Forming)
No.1 Spring Temper/Spring Temper
1. Solution Anneal at 980°C (1800°F) for 1 hour and air cool and
2. Age harden at 720°C (1330°F) for 8 hours and furnace cool to 620°C (1150°F) and hold at 620°C (1150°F) for a total age hardening time of 18 hours and air cool.
No.1 Spring Temper/Spring Temper (NACE MRO175)
1. 1010°C (1870°F) 2 hours and air cool and
2. 790°C (1455°F) 6 hours and air cool.
Condition
Approx Tensile Strength
Approx Service Temp.
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 +550°C
-330 to +1020°F
Spring Temper
1300 – 1500 N/mm2
189 – 218 ksi
–
-
Spring Temper + Annealed + Aged
1250 – 1450 N/mm2
181 – 210 ksi
-200 to +550°C
-330 to +1020°F
Relevant Standards
Inconel 718 is covered by the following standards:
• AMS 5663
• AMS 5832
• AMS 5962
• AMS 5662
• ASTM B637
Equivalent Materials
Inconel 718 is the tradename of Special Metals Group of Companies and equivalent to:
• W.NR 2.4668
• UNS N07718
• AWS 013
Applications of Inconel 718
Inconel 718 typically finds application in:
• Gas turbines
• Rocket motors
• Space craft
• Nuclear reactors and pumps.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Seller
Year Established:
1998
Total Annual:
45000000-50000000
Employee Number:
120~150
Ecer Certification:
Active Member
We have six subsidiaries located in Shanghai, Zhejiang, Jiangsu and Hongkong, which have built great relationship with the metal facilities abroad and at home, so as to provide excellent services for our clients.
We have own entire system for pre-sale, in-sale and after-sale process. And our b... We have six subsidiaries located in Shanghai, Zhejiang, Jiangsu and Hongkong, which have built great relationship with the metal facilities abroad and at home, so as to provide excellent services for our clients.
We have own entire system for pre-sale, in-sale and after-sale process. And our b...