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Alloy 718

Alloy 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 NA21

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LANGALLOY 718 Bar Purchase Specification

+ Alloy 718 Features

+ Applications of Alloy 718

+ Forms of Alloy 718 Available

+ Chemical Specification of Alloy 718

+ Physical Properties of Alloy 718

+ Basic Properties of Alloy 718 - Mechanical Properties

+ Machining Advice of Alloy 718 - Hot worked and precipitation hardened alloy

+ KEY Features of Alloy 718

+ Alloy Comparisons

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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