BÖHLER L718API

BÖHLERL718 API (UNS N07718) is a high-strength, corrosion-resistant nickel-chromium-iron-molybdenum material with excellent corrosion resistance, especially in H2S and CO2 environments. The alloy is age-hardenable due to the addition of niobium, titanium and aluminium.
BÖHLER L718 API is recognised by the oil industry for its simple and cost-effective production in combination with good tensile, fatigue, creep and fracture strength and is used in a wide range of applications in this sector.
BÖHLER L718 API has excellent weldability and is resistant to cracking after welding. The material can be used at high temperatures.

BÖHLER L718 API is available in the NACE/API 6A CRA versions with a minimum yield strength of 120/140 ksi and also in the high-strength version with 150 ksi. All hardness grades are suitable for sour service and can be used for pressurising and pressure-controlling equipment in corrosive environments. Typical applications include packers, pumps, connectors and fasteners as well as gate valves, throttle spindles, pipework hangers and fire safe valves, but also a wide range of downhole and completion components, nuclear and surface applications.

Available Product Shapes

Long Products: Presented data refer exclusively to long products. Please observe the detailed explanations at the end of the data sheet (pdf).

Melting Route

VIM + VAR

Material Numbers

Market grade
Alloy 718API
UNS
N07718

Standards

Others
API 6A CRA
Others
NACE MR0103 / ISO 17945
Others
NACE MR0175 / ISO 15156

Chemical Composition

* Chemical Composition (Average %)

C
max. 0.045
Si
max. 0.35
Mn
max. 0.35
P
max. 0.010
S
max. 0.010
Cr
17.0 to 21.0
Mo
2.80 to 3.30
Ni
50.0 to 55.0
Cu
max. 0.23
Co
max. 1.00
Ti
0.80 to 1.15
Al
0.40 to 0.60
Nb
4.87 to 5.20
B
max. 0.0060
Fe
REM
Pb
max. 0.0010
Bi
max. 0.00005
Ca
max. 0.0030
Mg
max. 0.0060
Se
max. 0.0005

Applications

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