Alloy 718

Want to keep this datasheet? Save it now in your required format

Description

Alloy 718 is a precipitation hardenable nickel chromium alloy. As the major alloy elements are molybdenum, niobium + tantalum, aluminium and titanium, Alloy 718 gives exceptionally high yield, good corrosion resistance, tensile and creep rupture properties at temperatures up to 700°C (1300F). Broder Metals Group stocks Alloy 718 in sizes from 1/2” (12.7 mm) to 4” (101.6 mm) backed up by key sizes above this core range. Our stock is bought to API 6A 718 and NACE and as such meets most application uses for the oil industry to maximise resistance to stress corrosion cracking or treated to give maximum strength and high creep resistance and weldability. Different heat treatments are available: Solution annealed and Age hardened.

Related Standards

Equivalent Materials

This material data has been provided by Broder Metals Group.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValueComment

Grain size

2 μm

Show Supplier Material materials with Grain size of 2 μm

Maximum, ASTM E112

Dimension

PropertyValue

Length

12.7 - 103.6 mm

Show Supplier Material materials with Length of 12.7 - 103.6 mm

Mechanical

PropertyTemperatureValueComment

Charpy impact energy, V-notch

-60.0 °C

68 J

Show Supplier Material materials with Charpy impact energy, V-notch of 68 J

Average

Charpy impact energy, transverse

-60.0 °C

47 J

Show Supplier Material materials with Charpy impact energy, transverse of 47 J

Single value

Elongation

23.0 °C

20 %

Show Supplier Material materials with Elongation of 20 %

Hardness, HBW

23.0 °C

298 - 363 [-]

Show Supplier Material materials with Hardness, HBW of 298 - 363 [-]

Hardness, Rockwell C

23.0 °C

32 - 40 [-]

Show Supplier Material materials with Hardness, Rockwell C of 32 - 40 [-]

Reduction of area

23.0 °C

35 %

Show Supplier Material materials with Reduction of area of 35 %

Tensile strength

23.0 °C

1034 MPa

Show Supplier Material materials with Tensile strength of 1034 MPa

Yield strength Rp0.2

23.0 °C

120 - 145 MPa

Show Supplier Material materials with Yield strength Rp0.2 of 120 - 145 MPa

Chemical properties

PropertyValueComment

Aluminium

0.4 - 0.6 %

Show Supplier Material materials with Aluminium of 0.4 - 0.6 %

Bismuth

5E-5 %

Show Supplier Material materials with Bismuth of 5E-5 %

Boron

6E-3 %

Show Supplier Material materials with Boron of 6E-3 %

Calcium

3E-3 %

Show Supplier Material materials with Calcium of 3E-3 %

Carbon

0.045 %

Show Supplier Material materials with Carbon of 0.045 %

Chromium

17 - 21 %

Show Supplier Material materials with Chromium of 17 - 21 %

Cobalt

1 %

Show Supplier Material materials with Cobalt of 1 %

Copper

0.23 %

Show Supplier Material materials with Copper of 0.23 %

Iron

Balance

Lead

1E-3 %

Show Supplier Material materials with Lead of 1E-3 %

Magnesium

6E-3 %

Show Supplier Material materials with Magnesium of 6E-3 %

Manganese

0.35 %

Show Supplier Material materials with Manganese of 0.35 %

Molybdenum

2.8 - 3.3 %

Show Supplier Material materials with Molybdenum of 2.8 - 3.3 %

Nickel

55 %

Show Supplier Material materials with Nickel of 55 %

Other

4.78 - 5.2 %

Show Supplier Material materials with Other of 4.78 - 5.2 %

Cb+Ta

Phosphorus

0.01 %

Show Supplier Material materials with Phosphorus of 0.01 %

Selenium

5E-5 %

Show Supplier Material materials with Selenium of 5E-5 %

Silicon

0.35 %

Show Supplier Material materials with Silicon of 0.35 %

Sulfur

0.01 %

Show Supplier Material materials with Sulfur of 0.01 %

Titanium

0.8 - 1.15 %

Show Supplier Material materials with Titanium of 0.8 - 1.15 %

Technological properties

Property
Application areas

Ideal applicationsfor Alloy 718 are in oil tools, such as gate valves, choke stems, etc., and high strength applicationssuch as fasteners and turbines.