Mukand Sumi Special Steel Assistant Manager Quality Interview Questions and Answers

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