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Modified 9Cr-1 Mo steel, being air hardenable is highly susceptible to hydrogen-assisted cracking (HAC). As welding is carried out using matching consumables, the weld metal is also equally susceptible to HAC. Preheating and post heating are generally employed to avoid HAC during fabrication. Susceptibility of indigenously developed modified 9Cr-1 Mo steel plate and shielded metal arc welding (SMAW)...