Question
High speed steel belongs to the category of ______ steel.
The correct answer is
alloy
Steel Category: Understanding High Speed Steel
High Speed Steel (HSS) is a category of tool steel known for its toughness, wear resistance, and ability to retain hardness at elevated temperatures.
Its characteristic properties come from the addition of significant amounts of alloying elements beyond carbon. Common alloying elements include tungsten (W), molybdenum (Mo), chromium (Cr), and vanadium (V).
Because it contains substantial amounts of elements other than just iron and carbon, High Speed Steel is classified as alloy steel.
- Alloy Steel: This is the correct classification, as HSS contains deliberately added elements like tungsten and chromium to enhance its properties.
- Stainless Steel: While HSS often contains chromium, it lacks the high chromium content (typically >10.5%) required for stainless properties and is not primarily designed for corrosion resistance.
- Low Carbon Steel: HSS has a much higher carbon content than typical low carbon steels.
- High Carbon Steel: While HSS does contain high carbon, the defining characteristic that places it in a separate category is the addition of *other* alloying elements, making 'alloy steel' a more specific and accurate classification.
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Important Questions from Classification of Materials
- Based on the crystalline grain and shape, quantum dots are :
- Carbon nano tubes (CNT) are _____ times stronger than steel.
- Which of the following fibres are obtained from plant leaf.
(i) Pina
(ii) Sisal
(iii) Kapok
(iv) Coir
Code : - Assertion (A) : While washing woollen garments kneading and squeezing method is used.
Reason (R) : Scaly structure of wool cause felting due to friction.
Code : - Assertion (A) : Terry Towel is the most absorbant fabric structure
Reason (R) : It is a cut pile hence more surface area to absorb water.
Code :
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