Inconel 718

Inconel 718

INCONEL® alloy 718 (UNS N07718/W.Nr. 2.4668) is a high-strength, corrosion-resistant nickel chromium material used at -423° to 1300°F.
The age-hardenable alloy can be readily fabricated, even into complex parts. Its welding characteristics, especially its resistance to postweld cracking, are outstanding. The ease and economy with which INCONEL alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications. Examples of these are components for liquid fueled rockets, rings, casings and various formed sheet metal parts for aircraft and land-based gas turbine engines, and cryogenic tankage. It is also used for fasteners and instrumentation parts.

Rod, Bar, Wire and Forging Stock:  ASTM B 637, ASME SB 637, AMS 5662, AMS 5663, AMS 5664, AMS 5832, AMS 5914, AMS 5962, ASME Code Case 1993, ASME Code Case 2206, ASME Code Case 2222, AECMA PrEN 2404, AECMA PrEN 2405, AECMA PrEN 2952, AECMA PrEN 2961, AECMA PrEN 3219, AECMA PrEN 3666, ISO 9723, ISO 9724, ISO 9725, DIN 17752-17754.

Plate, Sheet and Strip: ASTM B 670, ASTM B 906, ASME SB 670, ASME SB 906, SAE AMS 5596, SAE AMS 5597, SAE AMS 5950, AECMA PrEN 2407, AECMA PrEN 2408, ISO 6208, DIN 17750.
Pipe and Tube: SAE AMS 5589, SAE AMS 5590, ASME Code Case N-253, DIN 17751.

Specification

STANDARDS :	ASTM B637 N07718, API 6A 718 ASTM B637 N07718 API 6A 718 BS 3076 AM5662 AM5663
Forms :	Bars and Sections Hot and Cold Rolled Plate
Width :	100mm to 3000mm
Length :	1000mm above
Features :	Excellent corrosion resistance Resistant to chloride stress corrosion Resistant to sulphide stress cracking High fatigue strength in seawater High Strength and hardness Low magnetic permeability
Applications :	Oil and Gas Industry: Wellhead components, Safety Valves, Packers, Fasteners, Clamps, Downhole equipment for corrosive/sour service. Nuclear Power Plant: Containment vessels, Valves Engineering applications between 760°C and cryogenic temperatures

Chemical Composition

Element	Inconel 718
Ni	50 – 55
Fe	Bal
Cr	17 – 21
Cu	0.3 max
Mo	2.8 – 3.3
Nb	4.75 – 5.5
C	0.08 max
Mn	0.35 max
P	0.015 max
S	0.015 max
Si	0.35 max
Ti	0.65 – 1.15
Al	0.2 – 0.8
Co	1.0 max
B	0.006 max

Mechanical Properties

Density	8.2 g/cm3
Melting Point	1350 °C (2460 °F)
Tensile Strength	Psi – 135,000 , MPa – 930
Yield Strength (0.2%Offset)	Psi – 70,000 , MPa – 482
Elongation	45 %