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Fracture Toughness of 9% Nickel Steel at Low Temperatures

In order to investigate the fracture toughness of 9% nickel steel at low temperature, the specimen’s taken from Q+T pressure vessel plate of ASTM A553 Type I. Compact tension test was conducted on the test piece at subzero temperature -196°C. The fracture toughness value KIc is determined by using J-integral method:

KIc (at -196°C [-320°F]) = 184 MPa*m1/2 or 167 ksi*in1/2.

9%-Ni steel LNG tank in Netherlands

A LNG storage tank in Netherlands with its internal shell made of 9% nickel alloy steel.

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