In low-temperature environments, A516GR70(ASTM A516 Grade 70) may face the risk of Brittle Fracture (Brittle fracture), especially in operating conditions below -45℃ (such as LNG equipment, pressure vessels in cold regions).
Strictly inspect the chemical composition of the steel plate (such as controlling the phosphorus and sulfur content to <=0.025% to reduce impurity embrittlement).
Verify the mechanical properties (especially the Charpy V-notch impact test, to ensure that the impact energy meets the standard at the lowest design temperature, usually requiring >=20 J@ -45℃).
Normalizing process can refine the grain structure, enhance low-temperature toughness and resistance to brittle fracture.
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