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Alloy 718

Inconel 718

Alloy	Common Name	Related Specifications			Tensile Strength	Proof Stress	Elongation
Alloy	Common Name	British	European	United States	Tensile Strength	Proof Stress	Elongation
Alloy 718	INCONEL 718			ASTM B637 N07718, API 6A 718	1034 [150]	862 [125]	20

N07718, API 6A 718

Alloy 718 Bar stock sizes available
Diameter (in)	Diameter (mm)	kg per m
1	25.40	4.17
1 1/4	31.75	6.51
1 1/2	38.10	9.37
1 3/4	44.45	12.76
2	50.80	16.66
2 1/4	57.15	21.09
2 1/2	63.50	26.03
2 3/4	69.85	31.50
3	76.20	37.49
3 1/4	82.55	43.99
3 1/2	88.90	51.02
3 3/4	95.25	58.57
4	101.60	66.64

Specifications of Alloy 718

ASTM B637 N07718
API 6A 718
BS 3076
AM5662
AM5663

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LANGALLOY 718 Bar Purchase Specification

Chemical Specification of Alloy 718

Basic Properties of Alloy 718 - Mechanical Properties

Physical Properties of Alloy 718

Applications of Alloy 718

Alloy 718 Features

Forms of Alloy 718 Available

Machining Advice of Alloy 718 - Hot worked and precipitation hardened

Alloy Comparisons

KEY Features of Alloy 718

Disclaimer
Data in this Alloy 718 page is provided solely for the purposes of distribution of information. Langley Alloys cannot make guarantees with respect to subject matter or accuracy of this information. Langley Alloys specifically disclaims all guarantees, expressed, implied or otherwise, including without limitation, all warranties of merchantability and fitness for a particular purpose. This publication may include technical inaccuracies or typographical errors. If errors are found, please make a notification via e-mail to: info@langleyalloys.com

Elements	Al	B	C	Co	Cr	Cu	Fe	Mg	Nb	Ni	P	Pb	S	Si	Ta	Ti
Minimum	0.4				17		6.6		4.9	50
Maximum	0.6	0.0.006	0.045	1	21	0.15	19.3	0.35	5.2	55	0.01	0.0005	0.01	0.35	0.05	1.15

Density (Kg.m-1)	82.3
Magnetic Permeability (20°C)	<1.002
Curie Temperature (°C)	-152
Young’s Modulus (N/mm2)	200 x 10
Specific Heat, 20°C (J.Kg-1.°K-1)	435
Specific Electrical Resistance, 20°C (?O.m)	1.25
Thermal conductivity,20°C (W.m-1.°K-1)	11.1
Mean coefficient of thermal expansion, 20-100°C (°K-1)	12.1 x 10

Operation	Cutting Speed m/min (ft/min)	Feed Rate mm/rev (in/rev)	Depth of cut mm (in)
Milling	6-9 (19-29)	0.05-0.15 mm/tooth 0.002-0.006 in/tooth	0.2-3.0 (0.007-0.12)
Drilling – 6.4mm (1/4”) dia	5-8 (16-25)	0.02 (0.001)
Drilling – 12.7mm (1/2”) dia	5-8 (16-25)	0.08 (0.003)
Drilling – 25.4mm (1”) dia	5-8 (16-25)	0.13 (0.005)
Turning - Roughing	9-15 (29-48)	0.2 – 0.3 (0.008-0.011)	2.5 (0.1)
Turning - Finishing	15-24 (48-77)	0.08 – 0.20 (0.003-0.008)	0.25 (0.01)
Tooling	Milling/Turning: Carbide (SANDVIK GC 235, SECO T25M) , point angle 118°, chisel angle 120°Drilling: HSS

Alloy Comparisons	718 (aged)	NO4400	N05500	S31803	FERRALIUM 255-SD50
0.2% Proof Strength (N/mm²), minimum	827	170	690	450	600
Corrosion Rate (mm.y^-1) Seawater	<0.01	0.25	0.18	<0.01	<0.01
Corrosion Rate (mm.y^-1) 10% sulphuric acid at 80°C	<0.15	0.06	0.1	0.4	<0.15
Corrosion Rate (mm.y^-1) Boiling 50% nitric acid	1.5	1.1	<2	>5	>5