VIJAY SPHEROIDALS Quality Engineer Interview Questions and Answers

Chromium percentage in steel varies depending on the type of steel, typically ranging from 10.5% to 30%.

• Chromium is added to steel to improve its corrosion resistance and hardenability.

• Stainless steel typically contains around 10.5-30% chromium.

• Examples of chromium-containing steel include 304 stainless steel (18% chromium) and 420 stainless steel (12% chromium).

Sulphur can improve machinability and strength in steel, but can also lead to brittleness and reduced ductility.

• Advantages of sulphur in steel include improved machinability, allowing for easier cutting and shaping of the material.

• Sulphur can also enhance the strength of steel, making it more suitable for certain applications.

• Disadvantages of sulphur in steel include increased brittleness, which can lead to cracking an...read more

Grain structures of steel change at different temperatures affecting its properties.

• At room temperature, steel has a fine grain structure which provides good strength and toughness.

• As temperature increases, the grain size also increases, leading to reduced strength and toughness.

• At high temperatures, steel can have a coarse grain structure which may result in lower mechanical properties.

• Grain refinement techniques like...read more

The final/finished product temperature of Rebar is typically room temperature.

• Rebar is typically stored and used at room temperature

• The temperature of Rebar can vary depending on the environment it is stored in

• Rebar is not typically heated or cooled as part of the manufacturing process

Chromium content in steel typically ranges from 10-30% depending on the grade and type of steel.

• Chromium is added to steel to improve its corrosion resistance, hardness, and strength.

• Stainless steel typically contains around 10-30% chromium.

• High-chromium steels, such as tool steels, can contain up to 30% chromium.

• Chromium content can vary based on the specific grade and application of the steel.

Sulphur in steel can improve machinability but may reduce ductility and impact strength.

• Advantages: Improved machinability, easier to cut and shape

• Disadvantages: Reduced ductility, impact strength, and toughness

• Sulphur content should be controlled to avoid negative effects on mechanical properties

• Examples: Lead-free cutting steels often contain higher sulphur levels for better machinability

Different grades of steel have varying chemical compositions to meet specific requirements.

• Grades of steel include carbon steel, alloy steel, and stainless steel.

• Carbon steel typically contains 0.05-2.0% carbon.

• Alloy steel contains additional elements like nickel, chromium, and molybdenum.

• Stainless steel has high chromium content for corrosion resistance.

• Each grade has unique properties based on its chemical compositio

Sectional weight of steel varies based on the size of the steel section.

• The sectional weight of steel is calculated by multiplying the volume of the steel section by the density of steel.

• Different sizes of steel sections have different sectional weights.

• For example, a 100mm x 100mm x 10mm steel section will have a different sectional weight compared to a 150mm x 150mm x 12mm steel section.

Grains in steel change in size and shape at different temperatures, affecting its properties.

• At high temperatures, grains in steel are larger and more irregularly shaped.

• As steel cools, grains become smaller and more uniform, leading to increased strength and hardness.

• Grain boundaries can affect properties like toughness and corrosion resistance.

• Examples: Austenite has smaller grains at lower temperatures, resulting in...read more

Chromium percentage in steel varies depending on the type of steel, typically ranging from 10.5% to 30%.

• Chromium is added to steel to improve its corrosion resistance and hardenability.

• Stainless steel typically contains around 10.5-30% chromium.

• Examples of chromium-containing steel include 304 stainless steel (18% chromium) and 420 stainless steel (12% chromium).

Sulphur can improve machinability and strength in steel, but can also lead to brittleness and reduced ductility.

• Advantages of sulphur in steel include improved machinability, allowing for easier cutting and shaping of the material.

• Sulphur can also enhance the strength of steel, making it more suitable for certain applications.

• Disadvantages of sulphur in steel include increased brittleness, which can lead to cracking an...read more

Grain structures of steel change at different temperatures affecting its properties.

• At room temperature, steel has a fine grain structure which provides good strength and toughness.

• As temperature increases, the grain size also increases, leading to reduced strength and toughness.

• At high temperatures, steel can have a coarse grain structure which may result in lower mechanical properties.

• Grain refinement techniques like...read more

The final/finished product temperature of Rebar is typically room temperature.

• Rebar is typically stored and used at room temperature

• The temperature of Rebar can vary depending on the environment it is stored in

• Rebar is not typically heated or cooled as part of the manufacturing process