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The most important characteristic of these grades is the exceptional resistance to the attack of hydrogen sulfides and corrosion where Hydrogen Induced Cracking (HIC) of the metal takes place. HIC resistance steels, at the same time, are capable of maintaining strength integrity, as well as fracture toughness and high resistance to notch sensitivity. The key to success with this steel is the vacuum degassing and calcium treatment for sulfide shape control processes, which reduces “stringers” in the rolling process that are more susceptible to hydrogen sulfide attacks. Our HIC quality plate is ordered to meet more stringent requirements when hydrogen induced cracking tests per the latest NACE TM0284 are needed or sulfide stress corrosion cracking tests in accordance with the latest NACE standards TM-0177 are required.