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Anonymous Poster #1

Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/21/2017 5:41 AM

Hi! Im student from Poland and i have report to write on Material Science.

At first it looked fine and timeconsuming, but easy... but now...

Uncle google failed me. My topic is "7 main ferritic metals and 14 secondary".

I just need names of these metals, we have big library so then i will have all i need, but now i need to know awhen to start and what to look for at all -.-"

Can you help me? D=

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#1

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 6:25 AM

What do you have so far? How many ferritic metals do you have?

It will help to know what ferritic describes. What is ferrite?

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#2
In reply to #1

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 6:47 AM

By what i understand up to now ferric metals contain noticable ammounts of Cr (because it makes easier to keep iron in allotropic form of ferrit) and Ni.

So i chromium-nickel steel, according to my doubtful knowledge, is one example of ferritic metal =p
Looks like many of stainless steels are ferritic, but dont think this is good clue to follow.

Outside this... i have no idea in what direction should i look D=

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#25
In reply to #2

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/23/2017 1:51 PM

These are the magnetic stainless steels. Look it up again. Do not be too broke to pay attention to what the Universe is telling you.

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#3
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Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 6:58 AM

Also found other alloys like X2CrTi12 where i have no idea what X means, but i expcet taht 2 is percentage of cromium, ad 12 is for titan D=

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#4
In reply to #3

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 7:37 AM

You are on track with ferrite and that certain alloys are meant to favor resulting in ferrite.

If you have trouble researching a particular broad category, it may help to look at the opposite. It may help to look at nonferritic steel alloys. Austenitic stainless steels are nonferritic.

What qre the advantages/disadvantages of having mostly ferrite? Mechanical properties? Weldability? Formability? Resistance to corrosion?

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#5
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Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 8:12 AM

They are not temperable, hightly corrosion restistance, weak weldability, contain 12-14% of chromium, weaker formability.

I understand (that mean... i think so) what they are, what are they properties, i can find what are they used for, but my topic is to divide them into 7 main and 14 secondary groups. And thats where my knowledge fails me to do that... i could write this 21 random alloys considered ferritic steels but thats not what what professor ment.

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#7
In reply to #5

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 10:06 AM

Sounds like you need some further clarification from the instructor.

Could the 7 types be the alloy elements and the 14 the various multiple elements....I mean excluding chromium. Ti Mo Nb Al Ni.....?

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#8
In reply to #7

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 10:46 AM

That is possible... you know... i believe my professor is man of tremendous knowledge and this is hard for him to understand that we do not posses even tiny fraction of this D=
I will ask him on monday.

Thank you both, because of you i will not go to him emptyhanded =p

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#9
In reply to #8

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 10:50 AM

Good luck.

If only Milo were here.

Speaking of Precision

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#14
In reply to #8

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 4:10 AM

Do you aspire to work at the Yugo plant?

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#19
In reply to #14

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 11:50 AM

Errr... no... i aspire to finish my studies and to get full right to tell other people "trust me, im engineer" =p

And to do that i need to pass Material Science classes D=

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#11
In reply to #5

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 7:13 PM

Is there a textbook or course notes that go with this course that might provide a clue to this classification? From what I've found, it seems that there is quite a bit of variation on how these alloys are classified. It's not my field, but every reference I've read seems to have a different number of categories. (Has your instructor written any papers? - maybe check Google Scholar.)

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#17
In reply to #11

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 11:43 AM

Well... we got whole list composed of somethink like 50 titles every one of 500-1200 pages...

I searched throu my own notes, throu notes of friends and older colleagues. I checked his power-point and pdf lectures and searched internet... when he gave me this topic he sounded like there is one obvious system to classify them.

Aaand... now im not even sure if he told me what he wanted to tell me.

He said "as on last test, 7 main ferritic metals and 14 secondry". Sounded whimpy to me because on last test we had non-ferritic metals... i assumed just my memory tricks me but asked friends and they confirmed my statement.

If that would be non-ferritic metals would be it easier?

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#20
In reply to #17

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 4:13 PM

Maybe it was a trick to get you to do a lot of searching and learn a lot along the way!

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#21
In reply to #17

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 11:29 PM

Nonferritic steels, perhaps? The subject of nonferritic metals is quite broad.

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#10
In reply to #3

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 12:24 PM

I suspect that 'X' means that various metals can be substituted.

(Just a guess!)

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#15
In reply to #10

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/22/2017 8:37 AM

X? I think you know now: Any ferrimagnetic material having high electrical resistivity which has a spinel crystal structure and the chemical formula XFe2O4, where X represents any divalent metal ion whose size is such that it will fit into the crystal structure. http://encyclopedia2.thefreedictionary.com/ferritic

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#6

Re: 7 main ferritic metals (and alloys) and 14 secondary... student in need

01/21/2017 9:12 AM

Stainless steel - Wikipedia

SAE steel grades

There are over 150 grades of stainless steel, of which 15 are most commonly used. There are a number of systems for grading stainless and other steels, including US SAE steel grades.

Classifications of Stainless Steel - American Welding Society

Stainless Steels Classifications - Engineering ToolBox

Not my field. These may help.

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#12

Re: 7 Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/21/2017 11:56 PM

How does your professor know (or just fancy) that the number of primary ferritic groups is 7, rather than 6, 8, 9, or other? And even weirder, that the number of secondary groups is exactly 14? That sounds pedantic, bureaucratic, and arbitrary.

Moreover, a better point to understand would be the differing characteristics among ferritic, austenitic, and martensitic structures, rather then the mere number of each.

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#18
In reply to #12

Re: 7 Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/22/2017 11:46 AM

He sounded like there exists one obvious system to cassify them into this 21 groups =/
Ill ask him about that tommorow.

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#13

Re: 7 Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/22/2017 12:04 AM

I recommend a website called http://www.matweb.com/. Type in your requirements and they will have an answer. Materiel synthesis is not a function of this site. Good Luck with your paper.

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#16

Re: 7 Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/22/2017 9:45 AM

It's probably just an alloy of Iron+non-ferrite metal like (Co, Ni, Cr, Ag, Zn, Mg, Mo, etc.)

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#22

Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/23/2017 10:12 AM

Try www.matweb.com.

A very good searchable database of metals and some other materials.

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#23

Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/23/2017 12:33 PM

Ok, thank you all... i asked profesor and he meant 14 metals.

Sb, Be, Cd, Cr, Co, Mn, Hg, Ta, Mo, Nb, Ti, W, V and Zr

He told that he mentioned them on some lecture but noone ever heard that, so... i think that this was just on one slide in his presentation nobody assumed this to be so important. Thank you all again :-)

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Anonymous Poster #2
#24
In reply to #23

Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/23/2017 12:58 PM

You must be so poor. You could not even pay attention in class.

Also Arvee, your code has been compromised, please use: Ti W zR hG Mn but not O P Q nor R for all future communications with Professor Oneslide.

XNaCl with a hint of Mg will work wonders.

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#26
In reply to #23

Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/23/2017 2:10 PM

You may not have gotten all those alloying metals down correctly.

Specifically; Be, Cd, Hg, and/or Sb as alloying elements for steel do not sound right, at all.

Boron, nickel, carbon, copper, silicon, and aluminum are utilized in common alloys and should probably figure into this somewhere.

There seems to be a breakdown somewhere in the communication. Figuring out exactly how to fix that breakdown is the most important problem you need to solve for this class currently.

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#27
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Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

01/23/2017 2:56 PM

Makes you (or at least me) wonder if student is not fighting an uphill language barrier.

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#28
In reply to #26

Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

02/02/2017 3:01 PM

Interesting thread, but I haven't seen a definition of ferritic. Does it mean the material (usually a metal or alloy) shows ferromagnetic behaviour, or am I on the wrong track?

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#29
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Re: Seven Main Ferritic Metals (and Alloys) and 14 Secondary... Student in Need

02/02/2017 6:51 PM

Ferrite is an allotrope of iron. It is relatively soft, magnetic and has a body centered cubic structure. Carbon has limited solubility. It is ferromagnetic.

Ferrite steels usually refer to ferrite stainless steels. These have high chromium content and low carbon content and very little nickel. These are 400 series stainless.

Ferrite stainess steels are magnetic, offer good corrosion resistance, and are typically not hardenable by heat treatment. They can usually be work hardened and annealed. Machinability and weldability are typically good, though some grades can be finicky around the HAZ.

If you have a stainless kitchen knife and it is magnetic it is probably a ferrite stainless steel.

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