The density of stainless steel is about the same as carbon or low-alloy steels. 3 . Ans: d. 134. The Unified Numbering System, which was developed by American Society for Testing and … Which one? Stainless steel (D) Malleable cast iron. The alloy casting can improve its mechanical properties. Stainless steel is defined as an alloy of chromium and steel. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. What is the process of heating a hardened steel to any temperature below the lower critical temperature, followed by any desired rate of cooling? What type of steel has 0.8% carbon and 100% pearlite? Increase fluidity and lowers melting temperature. Pinoybix.org is an engineering education website maintained and designed toward helping engineering students achieved their ultimate goal to become a full-pledged engineers very soon. … Alloy steel casting is a steel casting process which is one kind of alloy castings. Stainless steel is an alloy, which means it is made up of several elements. 90. Three general classifications are used to identify stainless steels. Also known as "marine grade" stainless steel due to its increased resistance to chloride corrosion compared to type 304. Rust can be prevented by zinc plating. Explanation. 15,16. Practice Test: Question Set - 07 1. Help me go forward with the same spirit. 92. Also provides professionals with materials for their lectures and practice exams. What typical penetrator is used in Brinell hardness test? Stainless steel is a family of iron-based alloys that contain a minimum of approximately 11% chromium, a composition that prevents the iron from rusting, as well as providing heat-resistant properties. (C) Zinc and nickel. What is the most common alloying ingredient in copper? Steel is an alloy of iron and carbon with limits on the amount of carbon to less than _____ percent. 52. C? Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%, D. To increase fluidity and lowers melting temperature. Stainless steel is an alloy of Iron with a minimum of 10.5% Chromium. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Classification of Steels and Alloy Steels; 1) Which of the following neutral elements neither form carbides nor cause graphitization? The carbon percentage can range from 0.03% to 1.2%. Stainless steel belongs to alloy steel, a kind of high alloy steel, which contains a lot of chromium, enough nickel and a certain amount of titanium. Neal Berke, in Handbook of Environmental Degradation of Materials (Second Edition), 2012. There’s two main labels you’ll find on most stainless steel alloys: 1. What field of study encompasses the procurement and production of metals? What is the effect if manganese in cast iron? The addition of molybdenum prevents specific forms of corrosion. D. … Type 316—the second most common grade (after 304); for food and surgical stainless steel uses; alloy addition of molybdenum prevents specific forms of corrosion. The second most common grade after 304 is Type 316 Stainless Steel. Option C. stainless steel. D. Induction hardening is usually most efficient on small parts. Explanation: No … The addition of molybdenum and a slightly higher nickel content make 316 Stainless Steel suitable for architectural applications in severe … What is the ASTM tension testing designation for standard methods for steel products? A steel cannot qualify for stainless prefix until it has at least how many percent of chromium? 54. What is the advantage of quench hardening? Which one of the following greenhouse gases has the greatest warming effect. Other common additives include: Nickel; Carbon; Manganese; Molybdenum; Nitrogen; Sulfur; Copper; Silicon; The exact composition of an alloy is strictly measured and assessed throughout the alloying … Type 302. Stainless steel has become an intricate part of our daily lives. In tensile testing, the increase in the gage length measured after the specimen fractures, within the gage length is called _______. The total content of alloy elements can reach 10-28%, so it is a high alloy steel. View Answer: Answer: Option A. Steels that are used for axles, gears, and similar parts requiring medium to high and strength are known as? Set - 2 Metallurgy Test - This test comprises 31 questions on Metallurgy. 11.8 Stainless Steel. (a) High strength (b) High corrosion resistance (c) High ductility (d) Brittleness 3. SS316 is often used for building nuclear reprocessing plants. 316 is often used for building nuclear reprocessing plants. 79. Hazrat Abu Bakar (R.A) was the merchant of ? 73. The scale can be rem oved using several processes. C. Steel is an alloy of carbon and iron with limits on the amount of carbon (less than 2%) D. Steel is made by reducing oxide ore of iron by thermochemical reactions in a blast furnace or direct reductions vessel. Typically, this alloy contains about 10.5% chromium and 1.2% carbon by weight of the alloy. 99. Automobiles, medical equipment, food casing, and electronic devices are among the variety of ways we use stainless steel. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. Chromium produces a thin layer of oxide on the surface of the steel known as the 'passive layer'. Twitter. What is the approximate melting point of carbon steel? At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field. Same corrosion resistance as 304, with slightly higher strength due to additional carbon. Stainless steel is broken into five categories: a) Austenitic – Austenitic Stainless Steels are classed as the 200 and 300 series and the alloying elements are basically steel with 18% chromium and 8% nickel and low carbon content. What is defined as an intimate mechanical mixture of two or more phases having a definite composition and a definite temperature of transformation within the solid state? C. To reduce brittleness, combine with sulfur. 74. Stainless … 82. Iron is said to be abundant in nature. The role of chromium is to make the steel corrosion resistant, and the role of nickel is to reduce the austenitizing temperature of stainless steel. Oxidation Potential. Blog Authors (1260) (799) (740) (483) (454) (303) (140) 88. What is a method of casehardening involving diffusion in which the steel to be casehardened is machined, heat-treated, placed in an air-tight box and heated to about 1000oF? Families 2. ~950 degrees C ~1150 degrees C ~1350 degrees C ~1550 degrees C. Q18. What impurity in steel can cause “red shortness”, which means the steel becomes unworkable at high temperature? GradesBut what can you learn about these alloys from their labels?Plenty, if you know what to look for… C. Softens iron and increase ductility below 3.25% hardens iron above 3.25% and increase acid and corrosion resistance above 13%. This alloy is suitable for welding because it has a carbon content lower than 301 to 303 series alloys to avoid carbide precipitation in welding applications. Q16. 67. 87. Some might recommend it for use at 2,000°F, but at that point it’s usually better to use Inconel® instead. Stainless Steel, on the other hand, contains a minimum of 10.5% chromium content by mass. D. Stainless steels have tensile moduli greater than those of carbon and alloy steels. What prefix in steel identification means composition varies from normal limits? 26. Material Science/ Applications and Processing of Metals and Alloys Multiple Choice Questions Satish V. Kailas/IISc, Bangalore M9/V1/June 04/2 Answers: 1. c 2. b 3. c 4. b 5. a 6. b 7. d 8. b 9. a 10. c A) iron, chromium, nickel B) carbon and zinc C) zinc and iron D) iron and silver. 98. (a) Steel (b) Brass (c) Amalgam (d) Bronze. Home » GEAS » Questions and Answers in GEAS » Engineering Materials ». 93. 11) Atomic packing factor in case of Copper Crystal is a) 0.52 b) 0.68 c) 0.74 d) 1.633 12)The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called (A) Duralumin (B) Y-alloy (C) Magnalium (D) Hindalium 13) The crystal structure of brass is a) FCC b) BCC c) ... Read more Material Science MCQ Questions Answers Mechanical Engineering 81. 55. What is the ratio of stress to strain in a material loaded within its elastic ranger? 316L also is a great stainless steel for high-temperature, high-corrosion uses, which is Stainless Steel 316L Pipes are so popular for use in construction and marine projects. Oxidation States. 108. The most common steel produced is … While stainless must contain at least 10.5% chromium, the exact components and ratios will vary based on the grade requested and the intended use of the steel. (A) Copper with zinc (B) Red bras and yellow brass (C) Zinc and nickel (D) Cormium and nickel. Steel is an iron based alloy that contains carbon less than 1.2%. C. To affect machinability, ductility, and shrinkage depending on form, D. To reduce hardness by combining with sulfur below 0.5%. Hastelloy and stainless steel are two such alloys which are well known for their excellent corrosion resistance. Check the below NCERT MCQ Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Pdf free download. This corrosion resistance derives from the addition of at least 12% chromium, although the most widely used grades contain about 18% of this element. What is the approximate melting point of carbon steel? A) iron, chromium, nickel ... Antonyms MCQs Biology Mcqs Computer Mcqs English General knowledge Mcqs Islamiat Mcqs Math Mcqs Pak Mcqs Synonyms. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. QUIZ | ONLINE MULTIPLE CHOICE QUESTIONS (MCQS) TEST PREPARATION – QUESTIONS AND ANSWERS (ONLINE TEST PREPARATION MATERIAL) FEATURED QUIZ (ONLINE MCQ TEST) 1. Families refer to specific properties and give an idea as to the ratio of various metals in the alloy. To truly understand what separates one type of stainless steel from another, you’ll need to look … Stainless steel is an alloy of steel with a minimum of 10.5% and up to 30% chromium that gives this steel its unique properties. STAINLESS STEEL: Fabrication & Alloy Selection By: Darryl Mae Salili 2 4. 86. The 316 family is a group of austenitic stainless steels with superior corrosion resistance to 304 stainless steel. 80. Which of the following fluids conducts electricity? Option A. Stainless steel is an alloy of? The following statements are true except one. D) iron and silver, Your email address will not be published. Therefore, it has great corrosion resistance. 100. 78. Option B. CBSE Class 10 Science Book Chapter 3 “Metals and Non-Metals” Multiple Choice Questions (MCQs) with Answers. The high chromium and nickel content of this alloy helps it withstand prolonged exposure to temperatures of up to 1,900°F (1037°C). It is so designed to prevent the entry of boiling water coolant into the core. Grade 330 Stainless Steel. Engineering Materials MCQ question is the important chapter for a Mechanical Engineering and GATE students. Low-quality steels with an M suffix on the designation intended for non-structural application is classified as ____________. Which cast iron is hard and wear resistant? Advantages of stainless steel pipes . B) carbon and zinc It is also known as marine grade stainless steel due to its increased resistance to chloride corrosion compared to type 304. a. Aluminium b. Chromium c. Cobalt d. Copper. Reduce hardness by combining with sulfur below 0.5% and increase the hardness above 0.5%. B. The main difference between carbon steel and stainless steel is the amount of chromium that is added to the alloy. Posted by: Ali Raza Posted on: April 2, 2019 General knowledge Mcqs. 56. C. 4 . It is an integral part of modern life and is used in a range of applications, including heavy industry, architecture, automotive manufacture, surgery and dentistry.. Until the 1950s and 1960s, which saw the development of AOD (argon oxygen decarburization) and VOD (vacuum oxygen decarburization), the processes to produce stainless steel … MCQ quiz on Metals and Alloys multiple choice questions and answers on Metals and Alloys MCQ questions quiz on Metals and Alloys objectives questions with answer test pdf. 57. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. Stainless Steel is protected from oxidation due to the … The Importance of Chromium in Making Stainless Steel … What refers to the casehardening process by which the carbon content of the steel ear the surface of a part is increased? 6. ANSWER: QUIZ (MCQ TEST QUESTION) 1. Inconel vs stainless steel … www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. B. However, 316 can be annealed to resist weld decay. Classification of Steels and Alloy Steels - Mechanical Engineering (MCQ) questions and answers. An element X is soft and can be cut with the help of a knife. … As the name suggests, it is a type of material that doesn’t corrode. 59. By keeping the carbon below 0.03% max in this austenitic alloy has shown to minimize carbide precipitation during welding. It has the characteristic of greatly enhanced corrosion resistance over conventional lower alloy and carbon steels. Answer: (a) Steel. A. In the year 1913,a break through came when Brearly of Shiffield. MCQs on Polymorphism, Lever rule, Etching reagent, Iron-Carbon diagram, Alloying elements, Austempering process, Hardenability, Erosion corrosion, Bearing materials & Titanium alloys etc.1 mark is awarded … 69. 96. The density of stainless steel is about the same as carbon or low-alloy steels. Stainless steel is the alloy of; Stainless steel is the alloy of. Choose the letter of the best answer in each questions. Most watches that are made of stainless steel are made of this grade. CrNi60WTi, a stainless steel alloy of chromium, nickel, 60 percent tungsten and titanium formed under ESR + VAR conditions; Cobalt. 53. Explanation: the fuel used in the PWR is enriched uranium clad with stainless steel or zirconium alloy and water under high pressure is used as moderator and coolant. 63. D. 1 . C. Steel is an alloy of carbon and iron with limits on the amount of carbon (less than 2%). C) zinc and iron Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Along with their price … Our vast array of product forms includes plate, pipe, pipe fittings, flanges, sheet, bar, tube, wire and weld wire. Increasing the amount of Chromium gives an increased resistance to corrosion. The properties of the final alloy can be fine-tuned by altering the amounts of the various elements. Stainless steel is an alloy of? It is alloyed with numerous elements in total amounts between 1.0% and 50% by weight. Stainless steel is known for excellent corrosion resistance. The use of acids to remove oxides and scale on hot-worked steels is known as_______. The main difference between Chrome and stainless steel is that Chromium has a higher oxidation potential whereas stainless steel is … Alloy steels have been developed for a specific purpose. Q17. Related posts: Stainless steel is the alloy of: which of the following is the best conductor electricity ? Option C. 5% of alloy thickness. Indicate false statement about stainless steel? Check the below NCERT MCQ Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Pdf free download. What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface? What is prefix in steel identification means it is made in an electric furnace? What is the most undesirable of all the elements commonly found in steels? Answer . a. low temperature stability b. 84. 57 Therefore, its use is limited. Reference is often made to stainless steel in the singular sense as if it were one material. … Correct Answer is. While the amount of chromium in carbon steel is usually negligible, stainless steel has 10-20% chromium, and may have 7-9% of nickel. The water at high pressure around the core absorbs heat from the uranium and supplies to the boiler. What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar? 2 . we respect your privacy and take protecting it seriously, More Questions and Answers in Engineering Materials, Series of MCQ in General Engineering and Applied Science, Pinoybix Elex is officially on Google Play | First of …, Complete List of Reviewers to Pass Engineering Board Exam, MCQ in Machine Design and Shop Practice Part 18 | …, MCQ in Machine Design and Shop Practice Part 17 | …, MCQ in Machine Design and Shop Practice Part 16 | …, MCQ in Machine Design and Shop Practice Part 15 | …, MCQ in Machine Design and Shop Practice Part 14 | …. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Mild Steel is also known as carbon steel due to the fact that it contains between 0.05–0.25% carbon. Answer. Which element precipitates at the grain boundaries, when austenitic stainless steel is heated at 900 deg. Which of the following statements is NOT true? The second most common grade (after 304); for food and surgical stainless steel uses; Alloy addition of molybdenum prevents specific forms of corrosion. A few studies exist on the performance of stainless steel alloys in concrete. Page-4 section-2 Learn Engineering Materials MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Stainless steel is an iron and chromium alloy. Stainless steel demand is mostly in the form of ... Flat products Long products Tube products No particular form. (C) Zinc and nickel. CrNi60WTi, a stainless steel alloy of chromium, nickel, 60 percent tungsten and titanium formed under ESR + VAR conditions; Cobalt. Engineering Materials MCQ Quiz. Q9. To increase dynamic and high-temperature strength and hardness. 89. This is the Multiples Choice Questions in Engineering Materials Part 2 of the Series as one of the General Engineering and Applied Sciences (GEAS) topic. Pure iron does not have significant industrial use because it is too weak and soft. What ASTM test for shear strength is designated for plastics? 51. B. 85. To affect the machinability, ductility and shrinkage depending on form, B. 1% of alloy thickness. The term stainless steel is used to describe a family of about 200 alloys of steel with remarkable heat and corrosion resistance properties. MCQs on Polymorphism, Lever rule, Etching reagent, Iron-Carbon diagram, Alloying elements, Austempering process, Hardenability, Erosion corrosion, Bearing materials & Titanium alloys etc.1 mark is awarded … What ASTM test for compression is designated for plastic? A. In stainless steel alloy, iron metal is mixed with: (a) Cu and Cr (b) Cr and Ni (c) Cr and Sn (d) Cu and Ni. When attaching metal panels to those types of preservative-treated lumber, a moisture barrier should be used between the lumber and the panel material. which of the following is the best conductor electricity ? Question Number. A) iron, chromium, nickel Stainless steel is an alloy of steel with a high chromium content. 76. 66. Explanation: Stainless steel is an alloy of iron (a metal) and carbon (a non metal). Stainless steel is defined as an alloy of carbon and iron that has a minimum chromium content of roughly... 5% 10% 15% 20%. What is the common reinforcement for polymer composites? a) Stabilized grade of stainless steel containing titanium and niobium as an alloying element b) Low carbon grade of stainless steel c) Both a and b d) None of the above. Type 316 is a popular chromium, nickel, molybdenum-bearing stainless steel grade. Chromium produces a thin layer of oxide on the surface of the steel known as the ‘passive layer’. About 10% of the earth’s crust is iron. Which of the following cast irons is a high-carbon, iron-carbon-silicon alloy? This prevents any further corrosion of the surface. What is the purpose of molybdenum in steel alloying? Chromium on its own oxides quickly and produces a stable passive oxide film on … Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Non Ferrous Metals Alloys; 1) The alloy of Ti + 5% Al, + 2.5 Sn has _____. What ASTM test for tension is designated for plastics? Stainless steel is the alloy of; Stainless steel is the alloy of. In white … Stainless Steel: how problems arise and how to avoid Them Table 1. common Types of Stainless Steel stainless steel is a chromium alloy steel that’s resistant to rusting and corrosion. 75. Properties 316L Steels. 2. Stainless steels can be further divided into the following three categories: (1) Ferritic stainless steel: It is that steel when properly … Water spray can be used to condense the steam when pressure is … Here is a compilation of Free MCQs of Class 10 Science Book Chapter 3 – Metals and Non-Metals. What group of steel are water-hardened tool steels? Your email address will not be published. Stainless Steel is an alloy made up several elements; mainly Iron, Carbon and Chromium. Since the 17-4 precipitation-hardening (PH) stainless steel shows much higher mechanical properties than those for the 303, 304, and 316/316L austenite stainless steels, this alloy may be advantageous for brackets in the … 94. The particular application for which stainless steel will be used determines the type and grade of stainless steel. 55–57 Though performance is improved significantly, depending upon the alloy used, initial costs are quite high. 61. One of the m ost com m on m ethods, pickling, uses a nitric-hydrofluoric acid bath to descale the steel. What combination of elements has high electrical resistance, high corrosion resistance, and high strength at red hear temperatures, making it useful in resistance heating? This prevents any further corrosion of the surface. We pride ourselves in the stock holding and processing of Stainless Steels and Tool Steels with a vast array of … 71. Steel is an alloy of a) Copper and brass b) Iron and brass c) Carbon and brass d) Iron and carbon . A. Non Ferrous Metals Alloys - Mechanical Engineering (MCQ) questions and answers. 60. What is the effect of aluminum in cast iron? Its distinguishing characteristic is the high amount of chromium. B. Which of the following is an ore of mercury metal? 62. Stainless steel is defined as an alloy of carbon and iron that has a minimum chromium content of roughly... 5% 10% 15% 20%. This prevents any further corrosion of the surface. Since 1990, supplying and distributing exotic stainless steels, nickel alloys, duplex stainless, super duplex and other superalloys has been and still remains Mega Mex's core competency. In another m ethod, electrocleaning, an electric current is applied to the surface using a cathode and phosphoric … Posted by: Ali Raza Posted on: April 2, 2019 General knowledge Mcqs. Density: 8.03 g/cm 3 (0.290 lbs/in 2) Exceptional Properties: … What is considered as the general purpose oldest type and widely used cast iron? Share this... Facebook. Required fields are marked *. 83. • Stainless steel is an alloy of carbon +Iron with Chromium and Nickel • German silver is an alloy of copper with nickel and zinc • Solder is an alloy of lead and tin • Dental amalgam = mercury +silver, Tin, Zinc, Copper (a) Rock salt (b) Cinnabar (c) Calamine (d) Haematite. Material Science/ Applications and Processing of Metals and Alloys Multiple Choice Questions Satish V. Kailas/IISc, Bangalore M9/V1/June 04/1 Multiple Choice Questions: 1. B. Stainless steels are poor conductors of heat. Which of he following is a requirement for hardening a steel? With increasing chromium content, the corrosion resistance also increases. They are: 1. 72. About how many percent of the earth’s crust is iron? This is called a) Galvanizing … The main metal in monel is. Following is the list of multiple choice questions in this brand new series: P 5% of alloy thickness. Answer Explanation ANSWER: Cobalt . 15. The filament of electric bulb is made of: Tooth decay … Stainless steel is an iron alloy with added elements such as chromium, nickel, silicon, manganese, nitrogen and carbon. Solution: 108. C. Quench-hardened steel does not require tempering to prevent brittleness. This stainless steel alloy is specifically formulated to resist the effects of scaling and oxidation at high temperatures. Decreasing the sulfur in this grade will enhance its … A. Stainless Steel doesn’t have oxidation states as such, as it is an alloy. The carbon percentage can range from 0.03% to 1.2%. also been provided for your reference. Clad aluminium alloy (alclad) has a pure aluminium coating of. Which of the following cast irons is heat-treated for ductility? Descaling Annealing causes a scale or build-up to form on the steel. Stainless steel demand is mostly in the form of ... Flat products Long products Tube products No particular form. Unlike 300 series stainless steels that have an austenitic structure and 400 series stainless steels that have a ferritic structure, duplex stainless steels have a combination of both. 65. % C in medium carbon steels ranges from _____. Key difference: The primary difference between the two is the fact that stainless steel is a chromium based steel alloy, whereas mild steel is a carbon based steel alloy. Alloys are mixtures of different chemical elements, including metals as the major component and nonmetals as a minor component. The key difference between Hastelloy and stainless steel is that Hastelloy shows an outstanding corrosion resistance compared to stainless steel.. Correct Answer. (b) mild steel (c) stainless steel (d) carbon-chrome steel (e) high carbon steel. What is a coal that has been previously burned in an oxygen-poor environment? (a) 0.3 – 0.4 (b) 0.3 – 0.5 (c) 0.3 – 0.6 (d) None 2. Set - 2 Metallurgy Test - This test comprises 31 questions on Metallurgy. Inconel also has much better corrosion resistance and strength at high temperatures. Metallurgical Structure. Actually there are over 50 stainless steel alloys. A. Stainless steels are poor conductors of heat. What refers to the tin mill steel, without a coating? Stainless steel contains approximately 15% a) Titanium b) Zirconium c) Lithium d) Chromium . The alloy used is (A) Silver metal (B) Duralumin (C) Hastelloy (D) Invar. plated screws, zinc-alloy headed screws, stainless capped screws, aluminum, copper and copper alloy. Galvanized steel are steel products coated with _________. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. 91. The result of his discovery was a chrome alloy steel. Increasing the amount of Chromium gives an increased resistance to corrosion. Stainless steel is an alloy of Iron with a minimum of 10.5% Chromium. Indicate false statement about stainless steel? QUIZ | ONLINE MULTIPLE CHOICE QUESTIONS (MCQS) TEST PREPARATION – QUESTIONS AND ANSWERS (ONLINE TEST PREPARATION MATERIAL) FEATURED QUIZ (ONLINE MCQ TEST) 1. Chromium being a d block element exists in various oxidation states. 58. 77. 14. Which of the following cast irons is a high-carbon-silicon alloy? What group of steels are molybdenum high-speed steels? 70. What is the approx. Though it is often referred to as marine grade stainless steel, it is in fact not resistant to seawater. 7. However, at lower temperatures, steels like 17-4PH stainless will have a higher strength than Inconel. 97. Malleable cast iron (a) contains l.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron (b) is also known as chilled cast iron and is obtained by cooling rapidly. At the end of Multiple Choice Questions, the answer key has. Introduction of chromium steel to the field of orthodontics by Friel of Ireland in 1933. Stainless steel falls into four distinct families: Austenitic Stainless Steel; Ferritic Stainless Steel; Duplex Stainless Steel; Martensitic & Precipitation Hardening Stainless Steel; But the family is only part of the story. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) Chromium has a higher oxidation potential when compared to Iron. Q16. capital … Which of the following material has maximum ductility? D. Steel is made by reducing oxide ore of iron by thermochemical reactions in a blast furnace or direct reductions vessel.