Engineering :: Metallurgy
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Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that
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[A]. |
Steel has been properly hardened | [B]. |
Steel has not been properly heated
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[C]. |
Steel has been burned | [D]. |
Steel has achieved maximum possible hardness in accordance with the carbon percentage |
[E]. |
Steel contains excessive alloying elements |
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