Inconel 783(Ni-Co-Nb)

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1. Introduce

– Oxidation-resistant, low thermal expansion coefficient superalloy developed for gas turbine applications

– Oxidation-resistant and low-expansion Ni-based alloy with additions of Al, Cr and Nb

– Approximately 20% lower coefficient of thermal expansion than Inconel 718

– Oxidation resistance similar to Inconel 718 and better than Incoloy 909

– Good oxidation resistance at temperatures above 704°C and up to 1200°C

– Excellent thermal stability and mechanical properties over a temperature range up to 982°C

– UNS R30783

* Inconel

Features
– Resists oxidation and submersion in oxidizing and sulfurizing atmospheres above 900℃
– Non-corrosive to organic and salt solutions
– Excellent mechanical properties such as tensile and yield strength up to about 600℃
Applications
– High temperature heat resistant equipment(Heat treatment furnace, boiler, jet engine parts, electric heater parts)
Types
– Incoenl 600/601, Inconel 625, Inconel 690, Inconel 718, Inconel 718+, Inconel X-750, etc.

* UNS

Abbreviation for Unified Numbering Systems for Metals and Alloys
Unified unique numbering system for metals and alloys
A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.

* R : Reactive and Refractory Metals and Alloys

* UNS R30783 : 30XXX : Cobalt

2. Property

– Strength, corrosion resistance, oxidation resistance, low thermal expansion, specific strength, weldability, machinability, wear resistance

Element	Impact
Co	Highly strengthening element, provides strength and creep properties
Nb	Highly strengthening element, provides strength

[Inconel 783 Chemical Composition (%)]

Ni	Cr	Fe	C	Al
Bal.	2.5~3.5	24.0~27.0	Max. 0.03	5.0~6.0

Ti	Cu	Si	Mn	S
0.1~0.4	Max. 0.5	Max. 0.5	Max. 0.5	Max. 0.005

Co	Nb	P	B
38.0	2.5~3.5	Max. 0.015	0.003~0.012

[Inconel 783 Mechanical Properties]

Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)
779	1194	24

[Inconel 783 Physical Properties]

Density (g/㎤)	Melting Range (℃)	Specific Heat (0-100℃), J/kg*℃
7.81	1336~1407	455

3. Standard & Specification

– Specification : UNS R30783

ASTM	B168, D637, B705, B751, B775, B829
SAE	AMS 5940

Product Form	ASTM	ASME	SAE
Bar, Rod	B166	SB166	AMS 5940
Bolts, Nuts, Fasteners	B446, B564, F467, F468	–	AMS 5666

4. Available Form

– Bar, Rod

– Sheet, Plate, Strip

– Wire

– Tube, Pipe

5. Application & Product

– Aerospace, Chemical, Automotive

Application	Product
Aerospace	Turbine seals, Turbine casings, Turbine rings, Compressors, Combustors, Turbine blades, Afterburner components
Chemical	Heat exchangers, Reactor vessels, Piping
Automotive	Turbine wheels, Housings of automotive turbochargers