character: Steel Composition
topic: Composition of Steel
grade: 9
subject: Chemistry
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character: Steel Types
topic: Types of Steel and Their Properties
grade: 9
subject: Chemistry
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character: Carbon Steel
topic: Properties of Carbon Steel
grade: 9
subject: Chemistry
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character: Alloy Steel
topic: Composition and Characteristics of Alloy Steel
grade: 9
subject: Chemistry
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