For low-carbon structural steel,normally expect Charpy V-notch impact energy ~100 J at room temperature AS 3678 grade 400 specifies CVN avg 40 J at 20 C Measured on as-received sample avg 8 J (8.1 0.4 J) After baking 24hrs at 200 C avg 10 J (10.0 1.0 J) This represents very severe embrittlement,very
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