| Subject | Date Asked |
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| differences between 201, 202,304,316&430 | 10/17/2009 |
Q: i have similar problem that you answered in this address: ...
A: I am very sorry for the delay in answering your question. I receive a lot of questions related to ...
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| metallurgy | 10/15/2009 |
Q: what is carbide? How can be avoided in castings?
A: Carbides are compounds formed as a result of combination of carbon with other elements. In ferrous ...
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| ss200 series/ magnetism and drawing | 10/13/2009 |
Q: i want to draw ss200 series up dia 0.03mm(49swg) and i do not want magnetism to appear in the final ...
A: The strain-induced martensitic transformation (austenite to martensite transformation as a result of ...
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| heat treat specification | 8/27/2009 |
Q: For 17-4SS, is it appropriate to require a specification to heat treat to Condition H900, with the ...
A: Sorry I pressed the wrong button and sent you a message that I did not mean a few hours ago. I do ...
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| stress releive 4130 fixtures | 8/6/2009 |
Q: we are manufacturing steel tubular 4130 N engine mounts for aircraft . The new project we have is ...
A: Parts of the following answer are extracted from the 4th Volume of ASM Metals Handbook entitled Heat ...
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| Steel Strength | 6/28/2009 |
Q: Is higher strength steel worth more than lower strength steel?
A: As you probably know, increase of the strength would mean sacrifice of the ductility, so most of the ...
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| heat treating 17-4, 15-5 stainless steel | 5/29/2009 |
Q: I am heat treating 17-4 stainless steel. The conditions vary from 925-1150. When I do my Rockwell ...
A: The times and temperatures for the precipitation hardening treatment of 17-4PH and 15-5PH vary only ...
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| Reply to your mail | 3/19/2009 |
Q: "Is the steel mill furnishing your AISI 316L decided?" the steel mill has sent us the ...
A: The Cre/Nie I mentioned has been quoted from ASTM A800. Your reference I guess has been something ...
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| Reply to your mail | 3/18/2009 |
Q: "Is the steel mill furnishing your AISI 316L decided?" the steel mill has sent us the ...
A: So you are not purchasing the steel from a steel mill but you are making it yourself for your ...
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| heat treatment | 3/12/2009 |
Q: Mr. Javad, This is actually a follow up question from yesterday! How does heat treatment relieve ...
A: You are right indeed understanding the phrases "The dislocations which are internal defects created ...
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| Metallurgy | 3/11/2009 |
Q: Javad, Could you please explain to me what happens to metal at the molecular level when performing ...
A: To answer your question it is better to first consider how residual stresses develop during ...
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| 316 SS | 2/27/2009 |
Q: What is the AMS spec for tempering 316/316L stainless steel? We are trying to find what the spec is ...
A: Unfortunately I do not know any such specification and since it is very specialized, I believe it ...
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| 316 SS | 2/26/2009 |
Q: What is the AMS spec for tempering 316/316L stainless steel? We are trying to find what the spec is ...
A: AISI 316 is austenitic unless quenched to sub-zero temperatures or plastically deformed. Therefore, ...
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| Hardness testing | 2/24/2009 |
Q: When performing hardness testing on CrMo materials, why do you get different hardness values when ...
A: I guess there is a "compositional" reason behind what you are observing. In general the tentative ...
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| Quenched and tempered | 2/12/2009 |
Q: I have recently got a job in the oil industry suppling casing and tubulars, so I am desperately keen ...
A: Carbon steels exhibit different phases at different temperatures under equilibrium conditions. The ...
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| Yeild Strength of Stainless | 12/31/2008 |
Q: I am looking for a food grade Stainless that would have the yield (135,000 to 148,000 psi)and ...
A: For such high tensile strengths, your choice is limited to the martensitic grades of stainless steel ...
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| Content of Stainless Steel | 12/9/2008 |
Q: Mola, I am planning on making some small scale model trebuchets. I would like to use some metals ...
A: As much as I am concerned, there is no special alloying element added to make stainless steels ...
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| Heat Treatment | 11/14/2008 |
Q: what difference between diagrams of IT and CT in heat treatment of steels?
A: Isothermal Transformation (IT) and Continuous Transformation (CT) diagrams are diagrams used to ...
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| alloying elements | 9/14/2008 |
Q: 1 - What is the metallurgical explanation of effects of chromium, nickel, molybdenum and carbon in ...
A: Alloying elements in stainless steels can be divided into 2 main categories namely austenite and ...
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| Magnetism in St.St | 9/4/2008 |
Q: I work regularly with stainless steels in the aerospace industry, mostly annealed chromium nickel BS ...
A: In addition to you, this question is also of interest to many people in the stainless steel ...
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| Cause corrosion in stainless steel | 9/2/2008 |
Q: I'm working with particles of stainless steel and I would like to know the easiest way to attack by ...
A: Promoting uniform corrosion in stainless steels is very difficult because of ready formation of a ...
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| Heat Treated Shaft | 8/25/2008 |
Q: I have a customer who broke a 3/4" heat treated shaft with a ball on the end that is pulled through ...
A: in addition to high C content, has W and Cr in its composition. Therefore, hard tungsten and ...
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| hardness 17-4 stainless Cond H-900 | 8/15/2008 |
Q: I have seen conflicting data on this subject. What is the normal Rockwell hardness range for Type ...
A: The typical hardness of 17-4PH in the H900 age hardened condition is 41~46HRC (with 42~45HRC as a ...
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| Tensile strenght differences | 6/12/2008 |
Q: One of my competitors states that his 420 SS shaft has a tensile strength of 40,000 psi. My shaft is ...
A: Please first take a look at the typical chemistry of the stainless steels we are discussing: Main ...
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| ferrite numbers | 5/30/2008 |
Q: and Thank You in advance for any help you may be able to impart. I found this site Googling for a ...
A: For sure, performing actual tests on your desirable stainless steel and under your processing ...
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| What is SST? | 4/11/2008 |
Q: I would like to know what sst is? I think ss is by stanless steal because I saw 316L SST but I do ...
A: SST is just an alternative abbreviation for stainless steels. T might simply refer to the 2nd letter ...
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| What is SST? | 4/10/2008 |
Q: I would like to know what sst is? I think ss is by stanless steal because I saw 316L SST but I do ...
A: You are right about the term SST; it is an abbreviation for stainless steels although other ...
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| dislocation theory | 3/25/2008 |
Q: how we describe strain aging on the basis of dislocation theory?
A: The carbon/nitrogen atoms are important in yielding process because they interact with the ...
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| metallurgy | 3/23/2008 |
Q: what is proeutectoid ferrite and cementite? ANSWER: If you are not familiar with the Fe-C binary ...
A: In response to your question regarding effect of alloying elements on the recrystallization ...
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| metallurgy | 3/22/2008 |
Q: what is proeutectoid ferrite and cementite?
A: If you are not familiar with the Fe-C binary phase diagram, please try to download it before reading ...
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| metallurgy | 3/6/2008 |
Q: what is the metallurgy use. what is the casting and forgging, how to know casting material, ...
A: Actually, you asked a question which requires a very long-winded answer. In summary, Actually, you ...
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| heat treatment of weld | 2/11/2008 |
Q: i m an under graduate student of metallurgical engineering. should we heat teat like quench ...
A: The heat treatment procedure depends on the grade of steel you are dealing with. What I can do is to ...
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| heat treatment of weld | 2/9/2008 |
Q: i m an under graduate student of metallurgical engineering. should we heat teat like quench ...
A: Due to rapid solidification of melt zone in arc welded carbon steels (base metal acts as a heat ...
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| Rust on iron and steel | 1/21/2008 |
Q: Years back it was my understanding that iron or steel will not rust if the temperature is below 70 ...
A: No, it is not true. Iron has the potential to oxidize (generally termed rusting) when exposed to an ...
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| Hydrogen fluoride | 1/16/2008 |
Q: Please tell me any metal or alloy to protect against hydrogen fluoride?Thanks
A: Please refer to pages 1166-1170 of vol. 13 of ASM handbooks for detailed information on resistance ...
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| Normalizing A516-70 | 1/15/2008 |
Q: Mr. Mola, I have two questions. First, what is the required temperature and duration for ...
A: I could not find the normalizing temperature for A516 Grade 70 neither in the ASTM specification nor ...
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| carbonitride | 1/9/2008 |
Q: I'm not sure if you are knowledgable in carbonitriding or not, but I will ask this question anyway. ...
A: Simply use the hardness measurement technique you used prior to carbonitriding the parts; if you ...
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| liquid in which gold can be dissolved | 1/8/2008 |
Q: which is the only liquid in which gold is dissolved?
A: Since gold is very a noble metal, it does not dissolve in conventional solvents used to leach more ...
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| settling of 380 alloy follow up | 12/4/2007 |
Q: settling of the aluminum alloys 356 and 380. So if I wanted to speed up the process of settling ...
A: As may be deduced from the example in my previous answer, small rotational speeds may lead to ...
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| settling of 380 alloy follow up | 11/19/2007 |
Q: settling of the aluminum alloys 356 and 380. So if I wanted to speed up the process of settling ...
A: Indeed centrifugal forces can speed up separation of heavy atoms from light ones. So, in the ...
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| Is there software that will allow me to build a model and be able to test the heat transfer | 10/7/2007 |
Q: Is there a program that will let me test the conductivity of a metal like aluminum, and be able to ...
A: I consulted one of my friends to answer your question because this is not my field of expertise; I ...
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| molten metal settling | 9/27/2007 |
Q: will aluminum alloy like 380 or 356 settle? meaning while in "Liquid form" above melting point will ...
A: Sorry for the late response. And sorry if my previous answers have not been clear enough. In my ...
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| Engine | 8/30/2007 |
Q: e from Pakistan. I want to ask a simple question from u that what is the metallic composition of ...
A: First of all, I am so sorry for the late response. Engine blocks are conventionally made of gray ...
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| suggest me about project | 8/22/2007 |
Q: i.t.durgapur(west bengal) india. i waana do a project related 2 material sci.can u please tell me ...
A: Are you not already a B.S. student? If you are a student you need not to find any other institution ...
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| Quenching Effect During PWHT | 8/19/2007 |
Q: Greetings Javad- I hope you can help. I must perform a weld repair of a crack in a large AISI 4130 ...
A: Please notice that this is the first time I have come across a PWHT question that I intend to ...
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| Solution annealing | 8/10/2007 |
Q: How is solution annealing carried out? What type of furnace is required? Does one need to heat in a ...
A: Solution annealing is carried out by heating up the alloy to a temperature in which typically only ...
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| Do u have an idea 4 me ? | 7/14/2007 |
Q: I am a student of material science and engineering - Industrial Metallurgy in the Islamic Azad ...
A: As you are a BS student, you would better choose a simple project, i.e. a project which is feasible ...
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| molten metal settling | 7/7/2007 |
Q: will aluminum alloy like 380 or 356 settle? meaning while in "Liquid form" above melting point will ...
A: Sorry for the late response. Settling in the molten state merely depends on the density difference ...
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| molten metal settling | 6/25/2007 |
Q: will aluminum alloy like 380 or 356 settle? meaning while in "Liquid form" above melting point will ...
A: Yes settling, due to gravity, of heavier elements takes place in the fully molten state in the ...
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| heat treatement of steel | 5/30/2007 |
Q: I'm an engineer working in a heat treatment unit .when we measured the hardness of steel species ...
A: The difference in chemical composition and/or cross section of your parts is probably the reason for ...
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| heat treating | 5/15/2007 |
Q: from reading your profile this question is probably below your usual expertise. But I don't know ...
A: First of all, make sure you have carefully read the instructions on your bender's catalogue and then ...
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| Al alloy solidification | 5/3/2007 |
Q: I have two aluminium melts of exactly the same alloy - Melt Sample A contains grain refiner, while ...
A: The difference between solidification temperature of these two samples, A with grain refiner and B ...
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| Testing stainless composition | 4/30/2007 |
Q: Greetings. How can I find out what kind of stainless steel was used in making a stainless object? ...
A: Usually, one can simply guess the general type of stainless steel i.e. tell if it is ferritic (or ...
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| electron microscopy | 4/5/2007 |
Q: I'm not sure what I'm asking here is in your field. I have a semiconductor specimen of AlGaAs ...
A: As you had guessed electron microscopy and semiconductors are not my fields of expertise although I ...
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| metallurgy | 4/4/2007 |
Q: what is the grain size of lead as an element and as an alloy such as lead tin alloy
A: Grain size in alloys and pure elements is a function of their solidification rate. The higher the ...
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| composite material | 3/29/2007 |
Q: in composite material preparation does the settling time of particles increased when the stirring ...
A: In production of cast composites through mechanical stirring, where reinforcement particles are ...
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| aluminium | 3/27/2007 |
Q: We make aluminium moulds by press casting, can u suggest any thing so that the moulds should shine ...
A: Shininess of castings depends on the surface quality of cast parts. Casting surface finish is always ...
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| seperation anxiety... | 3/23/2007 |
Q: I am trying to seperate Bismuth from Tin. Please tell me where I can get information about this.
A: You need to find relevant books on extractive metallurgy of non-ferrous metals. There are useful ...
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| case harden steel properties | 2/21/2007 |
Q: Does case harden steel properties detoriates over time? especially for guns parts like bolt carrier? ...
A: Exposure to high temperatures can lead to weakening of case hardening effects due to phase ...
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| cold source | 2/16/2007 |
Q: I am looking for a way to take a piece of copper pipe or any metal pipe and making the surface cold. ...
A: You can use liquid gases for this purpose. Among liquid gases nitrogen is the cheapest one but as ...
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| Heat transfer ratios | 2/7/2007 |
Q: I am working on a project for school. I need to find a metal or alloy that has the best heat ...
A: I have no idea about the alloy frozen food trays are made of. However, I do know that you need an ...
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| Melting points | 2/4/2007 |
Q: What is the melting points of E70 steel, 304,308,316 stainless steels. And what is the hotest part ...
A: You may find the melting range of some frequently used stainless steels below. Steel is an alloy and ...
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| block and crank molds | 1/2/2007 |
Q: Wondering what material the actual molds of cast iron blocks and cranks are poured onto. My guess is ...
A: A cast iron having a similar composition to the alloy being poured would be the best choice. ...
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| 201 Stainless Steel (.8%-1.2% Ni) | 12/21/2006 |
Q: Given current trends with nickel pricing, and thereby stainless steel surcharges, our company is ...
A: I reviewed volume 1 of the Metals Handbook which is devoted to properties and selection of irons, ...
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| Stainless Steel | 12/14/2006 |
Q: How one can Differentiate between 304 & 316 grades of Steel (Physically)?
A: As far as I am concerned, there is no physical distinction between these two grades of stainless ...
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| Strength of Cast Irons | 11/20/2006 |
Q: Which of different types of cast irons is stronger? Is their strength superior to steels?
A: Generally, steels are considered to have better mechanical properties and also ductility. However, ...
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| Copper Information | 11/12/2006 |
Q: Please give me the details of Solidication pattern that will occur in Pure ETP copper
A: ETP copper is practically pure. So, we should consider solidification of pure metals to describe its ...
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| 1026 Steel | 11/11/2006 |
Q: Can 1026 steel be welded?
A: Since I am not a welding expert, I answer your question based on my general knowledge of metallurgy. ...
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| hardening | 11/4/2006 |
Q: what is meant by hardening ability of metals
A: It is the ability of a metal to become hard (and inevitably brittle) under a given cooling rate. ...
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| eletrical transfers | 10/23/2006 |
Q: what metal cord transfers electricity ,and how can i tell?
A: As far as I am concerned copper is known as a good and cheap conductor of electricity. Although ...
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| Dendritic Arm Spacing | 10/12/2006 |
Q: Good evening Sir. I currently have a requirement to measure both primary denrite and secondary ...
A: I had the same problem myself for a long time till I found the 'Image Tool' software which is a ...
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| stainless steel | 9/23/2006 |
Q: will ss 304 with nickle percentage - 5 to 6% get rusted in water. what is nickle, chromium, carbon ...
A: Chromium plays a key role in stainless steels since it forms a very thin oxide film on the surface ...
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