An austenitic stainless steel contains - Ni. O 12 – 15 % O 8 - 12% O 15 – 18 % O 18 - 20 %
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- A plain carbon steel contains 45 wt.% proeutectoid ferrite. What is the average carbon content in weight percent?T or F -In the hypereutectoid steel alloy, the primary phase is Cementite ( iron carbide ) -In the Pb-Sn hypoeutectic alloy, the primary phase is the α-phase -The eutectic composition of the solder alloy is 98%wt Sn -In the steel alloys, the weight percent of the alloying elements affects the eutectoid temperature and Ceutectoid wt%C -Austenite phase has a BCC crystal structure The microstructure is characterized by: a.The number of phases present b.The present phases’ proportions. c.How these phases are arranged or distributed d.all of the answers2- White cast iron can be heat treated Select one: True False
- Why must cracks in the martensite layer of high-manganese steels be removed?3-Miled steel can be converted into high carbon steel by which of the following heat treatment process: a- Normalizing b- Annealing c- Nitriding d- Case hardening 4-Which one of the following is the solid carburizing material: a-Charcoal b-NH4 c-NaOH d-CH4Martensitic sainless steel has corrosion resistance than ferritic and austenitic sainless steels. lower maybe higher or lower O higher
- What is the composition (wt% C) of a steel with AISI designation 1090? .Would this be considered a low, medium, or high carbon steel? (circle one)Ferritic sainless steel can be hardened as much as austenitic stainless stess. False O True Non ferrous alloys has greater stiffness than ferrous alloys. O True FalseSlowly cooled plain carbon steel has proeutectoid ferrite to be 10 wt% of its eutectoid ferrite. What is the carbon content of the steel?