2.3 Alloy steels

• Meaning of an alloy and of alloy steel
• Types of alloy steel: stainless steel, high speed steel, silver steel and high tensile steel
• Classification of alloy steels into low alloy steels and high alloy steels
• Alloying elements: chromium, nickel, molybdenum, manganese, tungsten, cobalt, vanadium and silicon
• Properties of alloy steels: strength, hardness, ductility, toughness, corrosion resistance and machinability
• Stainless steel and high speed steel in the metalworking industry
• Silver steel and high tensile steel in the metalworking industry
• Types of furnaces used in the production of alloy steel: basic oxygen, Bessemer converter, open hearth and electric furnace
• The process of alloy steel production
• Applications of alloy steels in the metalworking industry

• classify different types of alloy steels used in the metalworking industry
• explain the key properties of alloy steels used in the metalworking industry
• describe the processes of alloy steel production as used in metalworking industries
• select appropriate alloy steels for specified tasks in the metalworking industry
• appreciate the use of alloy steels in manufacturing industries

“What are alloy steels?”

“How are alloy steels classified and what properties do they have?”

“How are alloy steels produced and selected for a given task?”

The titles are open to everyone. Reading a lesson needs an account — sign in or create one.

1. What alloy steels are
   40 min · 1 practice tasks · quiz
   Introduce alloy steel and explain why alloying elements are added.
2. Types of alloy steel
   40 min · 1 practice tasks · quiz
   Identify the four main types of alloy steel used in metalwork.
3. Classifying alloy steels
   40 min · 1 practice tasks · quiz
   Classify alloy steels into low alloy and high alloy steels.
4. Alloying elements: chromium, nickel and molybdenum
   40 min · 1 practice tasks · quiz
   Explain the effect of chromium, nickel and molybdenum on steel.
5. Alloying elements: manganese, tungsten, cobalt, vanadium and silicon
   40 min · 1 practice tasks · quiz
   Explain the effect of five more alloying elements on steel.
6. Properties: strength and hardness
   40 min · 1 practice tasks · quiz
   Explain the properties of strength and hardness in alloy steels.
7. Properties: ductility and toughness
   40 min · 1 practice tasks · quiz
   Explain ductility and toughness in alloy steels.
8. Properties: corrosion resistance and machinability
   40 min · 1 practice tasks · quiz
   Explain corrosion resistance and machinability in alloy steels.
9. Stainless steel
   40 min · 1 practice tasks · quiz
   Describe stainless steel and its uses in the metalworking industry.
10. High speed steel and silver steel
    40 min · 1 practice tasks · quiz
    Describe high speed steel and silver steel and their uses.
11. High tensile steel
    40 min · 1 practice tasks · quiz
    Describe high tensile steel and its uses in construction and industry.
12. Furnaces used to make alloy steel
    40 min · 1 practice tasks · quiz
    Describe the furnaces used in the production of alloy steel.
13. The process of alloy steel production
    40 min · 1 practice tasks · quiz
    Describe the main steps in the production of alloy steel.
14. Selecting and appreciating alloy steels
    40 min · 1 practice tasks · quiz
    Select the right alloy steel for a task and appreciate its use in industry.