EOS Nickel Alloy IN718

EOS Nickel Alloy IN718 is a nickel based heat resistant alloy.

Its composition corresponds to UNS N07718, AMS 5662, AMS 5664, W.Nr 2.4668, DIN NiCr19Fe19NbMo3.

Ni (50 – 55 wt-%) &nbsp&nbsp&nbsp Co (<= 1.0 wt-%)
Cr (17.0 – 21.0 wt-%) &nbsp&nbsp&nbsp Cu (<= 0.3 wt-%)
Nb (4.75 – 5.5 wt-%) &nbsp&nbsp&nbsp C (<= 0.08 wt-%)
Mo (2.8 – 3.3 wt-%) &nbsp&nbsp&nbsp Si, Mn (each <= 0.35 wt-%)
Ti (0.65 – 1.15 wt-%) &nbsp&nbsp&nbsp P, S (each <= 0.015 wt-%)
Al (0.20 – 0.80 wt-%) &nbsp&nbsp&nbsp B (<= 0.006 wt-%)
Fe (balance)

Physical Properties

This nickel-chromium alloy hardens on precipitation. It is characterized by having good tensile, fatigue, creep and rupture strength at temperatures up to 700°C. The alloy also has outstanding corrosion resistance in various corrosive environments. Possesses excellent cryogenic properties.
ParameterAs Built (typical, heated at 20⁰C)After Age-Hardening
Tensile StrengthXY: 1060 ± 50 MPa; Z: 980 ± 50 MPamin. 1241 MPa ; typ. 1400 ± 100 MPa
Yield StrengthXY: 780 ± 50 MPa; Z: 634 ± 50 MPamin. 1034 MPa ; typ. 1150 ± 100 MPa
Elongation at BreakXY: (27 ± 5) %; Z: (31 ± 5 ) %min. 12 % typ. (15 ± 3) %
Modulus of elasticity160 ± 20 GPa170 ± 20 GPa
Hardnessapprox. 30 HRCapprox. 47 HRC

Other Properties

Coefficient of thermal expansionapprox. 12.5 – 17.2 x 10-6 m/m°C

Oxidation resistanceapprox. 980 °C
Max operating tempapprox. 650 °C
Densitymin. 8.15 g/cm³

Relative DensityApprox. 100%

3D Printing Details

Technology
DMLS
Possible Post Processing


machined, spark-eroded, welded, micro shot-peened, polished and coated
Accuracy

40 – 60 Microns(for small parts)
Min Wall Thickness0.3-0.4 mm
Min Layer Resolution40 Microns
Volume Rate
4 mm³/s
Surface RoughnessRa: 4-6.5 Microns ; Rz: 20-50 Microns

Applications

For applications which require high temperature
  1. Functional prototypes
  2. Series-production parts
  3. Aerospace
  4. Industry (e.g. high-temperature turbine components, instrumentation parts, power and process industry parts etc.)
  5. Cryogenic applications

Design Guidelines

Min Wall Thickness0.3-0.4 mm
Min Layer Resolution20 Microns
Min Detail Size0.8 mm
Min Hole Diameter0.8 mm
Min Text Size2.5 mm
Max Part Dimension300 mm

Gallery

2016-08-23T07:26:33+00:00 August 22nd, 2016|3D Materials|0 Comments

About the Author:

Raja Sekhar Upputuri
Co-founder at think3D. Passionate about entrepreneurship & 3D Printing.

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