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 False
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- A steel contains 18% pearlite and 82%primary ferrite at room temperature. Esti-mate the carbon content of the steel. Is thesteel hypoeutectoid or hypereutectoid?I. Martensitic stainless steels are capable of being heat treated II. Austenitic Stainless Steels are the most corrosion resistant because of the high chromium contents III. Ferritic Stainless Steels are hardened and strengthened by cold work Which statement(s) is/are true given above about stainless steels?Austentitic stainless steel's are not hardenable by cold working however Austentic stainless steel's can be strengthened by heat treatment true or false?
- Of the following alloys, pick the one(s) thatmay be strengthened by heat treatment,cold work, or both: R50250 titanium, AZ31Bmagnesium, 6061 aluminum, C51000 phos-phor bronze, lead, 6150 steel, 304 stainlesssteel, and C17200 beryllium copper.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-CH4Slowly cooled plain carbon steel has proeutectoid ferrite to be 10 wt% of its eutectoid ferrite. What is the carbon content of the steel?
- This equilibrium phase of steel only occurs at temperatures above 723° C: martensite ferrite austenite O cementiteMartensitic sainless steel has corrosion resistance than ferritic and austenitic sainless steels. lower maybe higher or lower O higherWhy must cracks in the martensite layer of high-manganese steels be removed?
- Question-6 A 0.25% C hypoeutectoid plain-carbon steel is slowly cooled from 950°C to a temperature just slightly below 723°C. (a) Calculate the weight percent proeutectoid ferrite in the steel. (b) Calculate the weight percent eutectoid ferrite and weight percent eutectoid cementite in the steel.I. HSLA steels are developed to replace gray irons II. In normal atmospheres, HSLA steels are more resistant to corrosion than the plain carbon steels III. HSLA steels are ductile, formable and machinable Mark the false statement given above about HSLA (High Strength, Low Alloy) steels?Both for Ferritic and Martimenistic sstainless steel belong to the AISI 400 series. Farris stainless steel's are heat treatable grades and Martinisitic stick stainless steel's can only be strain hearted to improve their mechanical properties. True or false