| Subject | Date Asked | Expert |
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| differences between 201, 202,304,316&430 | 10/17/2009 | Javad Mola |
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 | P.G.Panikkar |
Q: can u please send some photographs regarding the microstructure of carbide, bainite, retained ...
A: Sorry. I feel you have not verified my area of expertise before asking this question to me.Have you ...
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| metallurgy | 10/15/2009 | Javad Mola |
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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| Metallurgy - Effect of Normalising, Need to Normalize | 10/14/2009 | P.G.Panikkar |
Q: What is the need to Normalize the Steels after rolling? Effect of such normalizing ? Effect of using ...
A: Please look in to Wikipedia by google search and read "Normalizing: Carbon steel is heated to ...
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| ss200 series/ magnetism and drawing | 10/13/2009 | Javad Mola |
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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| METALLURGY | 9/23/2009 | P.G.Panikkar |
Q: what make the welding of medium cARBON STEELS DIFFICULT COMPARE TO LOW CARBON STEELS
A: Please refer to the book "Physical Metallurgy Principles" byRobert .E.Reed Hill and Physical ...
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| METALLURGY | 9/15/2009 | P.G.Panikkar |
Q: SIR, WE MANUFACTURE GEARS WITH CASE HARDENING STEEL WHICH HAS NICKEL CONTENT OF 3.8 TO 4.5 ...
A: You can prepare a test sample and give to any reputable crystallographic laboratory.They will give ...
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| solidification | 9/9/2009 | P.G.Panikkar |
Q: why metals solidify at a particular temperature and its alloy over a range of temperature??? does it ...
A: 1.My Emil ID is pgpanikkar@rediffmail.com 2. I suggest you to put this an open question so that ...
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| Melting Bismuth | 9/7/2009 | P.G.Panikkar |
Q: Sir, I intend to use a small raw bismuth block in magnetic experiments and need to change the ...
A: I am sorry to tell you that this question does not belong to my area of expertise.How ever as the ...
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| heat treat specification | 8/27/2009 | Javad Mola |
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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| 316 Stainless Sheet | 8/18/2009 | P.G.Panikkar |
Q: is there somewhere I can find what the official range in regards to tensile and yield of 316 ...
A: I am sorry that I could not answer the question early as I did not have the ready answer with me. ...
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| Stainless and Carbon Contact | 8/17/2009 | P.G.Panikkar |
Q: We're looking to build a cover for a old abandon concrete stack. We want to use 11 gauge stainless ...
A: You are correct that when two dissimilar metals in contact create corrosion. "Corrosion is a ...
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| stress releive 4130 fixtures | 8/6/2009 | Javad Mola |
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 grade St 52-2 & 53-2 | 8/3/2009 | P.G.Panikkar |
Q: I have requirement for steel plates chequered for Grade St 52-2 & 53-2, i have received offered from ...
A: The Q235 B is a mild steel and the chemical and mechanical properties are approximate as follows:- ...
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| iron ore analysis | 7/31/2009 | P.G.Panikkar |
Q: Please let me know the accuracy limit of online analysis of Fe content in iron ore by XRF and other ...
A: As you know well, In wet analysis always there is scope of human errors more than other methods. I ...
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| gold versus brass | 7/14/2009 | P.G.Panikkar |
Q: my husband and i found a piece of metal from a 1910 engine and it looks like gold however we are ...
A: You may please go to a gold smith or a shop dealing old ornaments.They will test and inform you ...
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| Gold extraction From Sand | 7/7/2009 | P.G.Panikkar |
Q: I am a water well driller in Reno Nv. area and am interested in retrieving gold from my mud unit. ...
A: Please take a few representative samples and get the same analyzed in a reputable laboratory for the ...
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| Mercury for gold recovery | 7/6/2009 | P.G.Panikkar |
Q: I have a couple of questions for you. If you can't answer one or the other maybe you can direct me ...
A: First of all please understand that 8.5 ounces of mercury is not a gold mine for you. It is only a ...
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| Steel Strength | 6/28/2009 | Javad Mola |
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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| MELTING GOLD & ALUMINUM | 6/6/2009 | P.G.Panikkar |
Q: I melted 4 ounces of 14K gold to attempt to mold a 3 oz. fishing weight for a pendant. After a few ...
A: Aqua regia can dissolve the gold and you can recover Gold. Please read the google search and fine ...
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| iron ore analysis | 6/4/2009 | P.G.Panikkar |
Q: Can you give me information for online iron ore analysis.
A: There are many methods for on line analysis including the microwave,XRF,XRD, etc.Even for moisture ...
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| Hi P iron ore | 6/1/2009 | P.G.Panikkar |
Q: We have access to a high grade (Fe) Iron ore, but P content between 2%-3%,on an early mining ...
A: In acid Bessemer process only carbon ,silicon and Manganese can be eliminated.There is no ...
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| heat treating 17-4, 15-5 stainless steel | 5/29/2009 | Javad Mola |
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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| metals | 5/27/2009 | P.G.Panikkar |
Q: i am inquiring about the mixture of certain metals together. I am wondering is it possible to mix ...
A: 1.No, by mixing metals nothing can be achieved. It will be a heterogeneous mixture of metals with ...
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| Non-Ferrous Alloys Question | 5/25/2009 | P.G.Panikkar |
Q: I want to start a new business of importing Non-Ferrous Alloys and supplying to different ...
A: 1. There are many web sites dealing with non ferrous alloys. I think Alibaba.com is one of them. ...
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| metal extraction | 4/29/2009 | P.G.Panikkar |
Q: difference between cast iron and pig iron on manufacturing basis
A: Pig iron "Pig iron is the intermediate product of smelting iron ore with coke, usually with ...
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| ASTM standards-latest version | 4/29/2009 | Alexandre Guimarães Botelho |
Q: Can you please provide some information about latest versions of the following ASTM standards ...
A: Unfortunately I have no experience with this structural steel, specially under brittish standards ...
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| iron from steel | 4/9/2009 | P.G.Panikkar |
Q: Sir: is it possible to extract the iron from steel in other words unalloy or remove the "impurities" ...
A: The question is very interesting.But sorry to say that I have not come across any process by which ...
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| Reply to your mail | 3/19/2009 | Javad Mola |
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 | Javad Mola |
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 | Javad Mola |
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 | Javad Mola |
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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| metallurgy | 3/1/2009 | Alexandre Guimarães Botelho |
Q: I have an antique piece of 'silverware'assayed a long time ago as being 85% silver 15% lead. Does ...
A: I have done a little research on my material and in some specialized sites and could not find any ...
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| 316 SS | 2/27/2009 | Javad Mola |
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 | Javad Mola |
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 | Javad Mola |
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 | Javad Mola |
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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| metallurgy | 2/3/2009 | P.G.Panikkar |
Q: how to measure the temperature of melting furnace which instrument is been used?
A: The instruments used for the measurement of the melting furnaces are based on the applications and ...
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| Commonly used Metals | 1/11/2009 | Alexandre Guimarães Botelho |
Q: I'm doing a science project and I need to know which metals are most commonly used in construction. ...
A: That will depend on the segment. For oil&gas, we use mostly low and medium carbon steel, and ...
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| metallurgy | 1/8/2009 | Alexandre Guimarães Botelho |
Q: what is or what characterize the thermodynamic state of metal (structure of metal)? Thank You, Janez
A: In the solid state, metals have a cristalline structure made of metal atoms which are drawn together ...
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