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This article is written in British English, which has its own spelling conventions (colour, travelled, centre, defence, artefact, analyse) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus. |
Mr. Nygaard: Sorry about the plural thing. I imagine I seemed stubborn and rude, but in fact I didn't know how to use the site, and had no earthly idea that it had been chanced back those times. I say something is "at 300 Kelvin" or "10 Kelvin" all the time at work, but I guess differences could be expressed as "Kelvins"...I'm certain that "degrees Kelvin" is correct in both cases. Anyhow, sorry for the trouble. User:Polyparadigm
I would like to say, out of 4 weeks of intensive research on combustion and related materials, this is the best written article on a complex topic I have read. Clear, concise and complete. Thank you very much for your contribution. Still need to find actual values of thermal conductivity for Cast Iron...
PSU Engineering Dropout
I have expanded the article by adding a section on the uses of cast iron. However I have only carried the history of this up the the 19th century. Would some one else like to expand this to bring it up to date? Peterkingiron 23:08, 14 May 2006 (UTC)
Why is there no mention of cast iron to radiate heat? - - Prairieplant ( talk) 02:13, 4 March 2021 (UTC)
"The exceptionally high speed of sound in graphite gives cast iron a much higher thermal conductivity."
Could someone explain this? Seems to make no sense to me. User:Pedant 17:21, 6 October 2006 (UTC)
This section is insufficently detailed/meaningful to warrant inclusion. -- Belg4mit 16:57, 23 October 2006 (UTC)
Object - the section is appropriate here. I am merging the section to which the merge is proposed into a new History of Ferrous Metallurgy, but will probably refer back to this article. However, more on the modern uses of cast iron, and its use by the Chinese in antiquity would be appropriate. Peterkingiron 17:27, 17 December 2006 (UTC)
I'm not in the know but my instincts tell me that 'iron' and 'bridges' should be lower case because the section is talking about cast iron bridges in general, which happens to also include the Iron Bridge. -- Wizard191 ( talk) 01:20, 10 January 2008 (UTC)
The Brompton Bicycle article claims that the hinges of this folding bicycle are made of cast iron, with no reference. Initially I thought that this would be too brittle, but after reading this article It seems that it would be feasible, but I still have my doubts. Can steal and cast iron be brazed together as it implies? If not, is there some other way it could be joined. Anyone more knowledgeable about metallurgy have any input?-- Keithonearth ( talk) 03:01, 25 December 2008 (UTC)
Thanks for the info. It's good to know. -- Keithonearth ( talk) 08:21, 26 December 2008 (UTC)
I removed the "invented by Chinese" stuff and clarified that a cupola is not the same thing as a blast furnace. —Preceding unsigned comment added by John Chamberlain ( talk • contribs) 23:21, 10 February 2009 (UTC)
Shouldn't this article try to fit in some at% figures to give perspective to some readers? 5 wt% carbon doesn't sound like much to nontechnical readers who may momentarily forget how just how much carbon there is in a 5 wt% solution in iron, molar-wise. John Riemann Soong ( talk) 10:01, 12 November 2009 (UTC)
I started to edit some misleading figures in this table but this will be a big project. Firstly it refers to ASTM specifications which are nice for U.S. readers but ignores ISO, JIS or other standards. The table is in ksi and not in SI units. Also the figures are misleading because there is a wide variety of strength grades for gray iron, ductile iron and malleable irons. The same is true for austenitic irons. This needs a lot of work if a table such as this does not have some disclaimers. Also to call it a table of qualities is a biased term. It seems to be a table of mechanical strength properties. Mfields1 ( talk) 02:26, 20 November 2009 (UTC)
While I agree that the unqualified statement on welding should have been modified, I don't think it is a good idea to remove it completely. The problems with welding of any irons within the family of cast irons are 1) the graphite can cause microstructural changes to the matrix that must be accepted or dealt with, 2) suitable filler metals must be used which will rarely or never match the base iron microstructure (leading to strength degradation and sometimes poor color match) and yhe castings can crack if suitable preheating countermeasures are not employed. While cast iron may not be the most difficult alloy to weld it ranks very high in this regard. Mfields1 ( talk) 02:35, 25 November 2009 (UTC)
hi i am asking all of you aut there what is cast iron made of?if you know please post a comment on this talk. —Preceding unsigned comment added by 81.155.219.48 ( talk) 18:03, 2 November 2010 (UTC)
Is the word "flammable" being used correctly in the "Textile mills" section?
According to Strunk & White (third edition, pg 47), the word "inflammable" should be used instead. Anonymous440 ( talk) 19:52, 1 December 2011 (UTC)
"The alloy constituents affect its colour when fractured: white cast iron has carbide impurities which allow cracks to pass straight through..." — Preceding unsigned comment added by 58.106.128.172 ( talk) 12:22, 6 June 2012 (UTC)
It says "magnesium or cerium added to these alloys". It would be helpful to clarify which alloys are being referred to. Thanks. — Preceding unsigned comment added by Craniator ( talk • contribs) 15:14, 8 August 2013 (UTC)
Be aware of the problem that "malleable iron" has two distinct meanings: Either the same as "malleable cast iron" or "wrought iron". I think tne first is American and the second British. 188.178.124.116 ( talk) 11:21, 25 September 2013 (UTC)
Can anyone comment here on whether or not cast iron tends to resist warping under heat (more than certain kinds of rolled steel)?
And, if this is so, it might be worth adding something about this quality of cast iron to the article. Joel Russ ( talk) 06:16, 7 January 2014 (UTC)
"When Abraham Darby II built his furnaces at Ketley and Horsehay in 1766 and 1756 he erected steam engines with cylinder bellows for blowing....[cites other such installations in 1760s]...Even so, the steam engine was not connected directly with the bellows but merely pumped water from a lower to a higher pond, from which it turned a waterwheel operating the bellows with the aid of cams. Many other engines were in use at the time for drainage of the Dale Company's coal pits and the company were involved in making many parts of Newcomen engines for use all ofvr the country. Smeaton seems to have been one of the first to use iron blowing cylinders in a design for the furnaces at Carron in 1768, but even these were powered by a waterwheel." [1]: 124
Referring to the use of recirculating water:
"The first change made by Darby II was the use of the atmospheric engine for this purpose in 1742. This started the gradual development of more powerful blowing engines to supersede the larger and more cumbrous leather bellows which required 120 kg of leather annually." [1]: 123
From reading his book, Professor Tylecote appears to have a very god technical understanding of metallurgy and it's history. Judging from the price, Tylecote, 2nd edition must be good. I have an ex-library copy that I obtained a few years ago at ordinary used book pricing. Phmoreno ( talk) 17:58, 2 September 2018 (UTC)
References
{{
cite journal}}
: Invalid |ref=harv
(
help)
This
level-4 vital article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
This article is written in British English, which has its own spelling conventions (colour, travelled, centre, defence, artefact, analyse) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus. |
Mr. Nygaard: Sorry about the plural thing. I imagine I seemed stubborn and rude, but in fact I didn't know how to use the site, and had no earthly idea that it had been chanced back those times. I say something is "at 300 Kelvin" or "10 Kelvin" all the time at work, but I guess differences could be expressed as "Kelvins"...I'm certain that "degrees Kelvin" is correct in both cases. Anyhow, sorry for the trouble. User:Polyparadigm
I would like to say, out of 4 weeks of intensive research on combustion and related materials, this is the best written article on a complex topic I have read. Clear, concise and complete. Thank you very much for your contribution. Still need to find actual values of thermal conductivity for Cast Iron...
PSU Engineering Dropout
I have expanded the article by adding a section on the uses of cast iron. However I have only carried the history of this up the the 19th century. Would some one else like to expand this to bring it up to date? Peterkingiron 23:08, 14 May 2006 (UTC)
Why is there no mention of cast iron to radiate heat? - - Prairieplant ( talk) 02:13, 4 March 2021 (UTC)
"The exceptionally high speed of sound in graphite gives cast iron a much higher thermal conductivity."
Could someone explain this? Seems to make no sense to me. User:Pedant 17:21, 6 October 2006 (UTC)
This section is insufficently detailed/meaningful to warrant inclusion. -- Belg4mit 16:57, 23 October 2006 (UTC)
Object - the section is appropriate here. I am merging the section to which the merge is proposed into a new History of Ferrous Metallurgy, but will probably refer back to this article. However, more on the modern uses of cast iron, and its use by the Chinese in antiquity would be appropriate. Peterkingiron 17:27, 17 December 2006 (UTC)
I'm not in the know but my instincts tell me that 'iron' and 'bridges' should be lower case because the section is talking about cast iron bridges in general, which happens to also include the Iron Bridge. -- Wizard191 ( talk) 01:20, 10 January 2008 (UTC)
The Brompton Bicycle article claims that the hinges of this folding bicycle are made of cast iron, with no reference. Initially I thought that this would be too brittle, but after reading this article It seems that it would be feasible, but I still have my doubts. Can steal and cast iron be brazed together as it implies? If not, is there some other way it could be joined. Anyone more knowledgeable about metallurgy have any input?-- Keithonearth ( talk) 03:01, 25 December 2008 (UTC)
Thanks for the info. It's good to know. -- Keithonearth ( talk) 08:21, 26 December 2008 (UTC)
I removed the "invented by Chinese" stuff and clarified that a cupola is not the same thing as a blast furnace. —Preceding unsigned comment added by John Chamberlain ( talk • contribs) 23:21, 10 February 2009 (UTC)
Shouldn't this article try to fit in some at% figures to give perspective to some readers? 5 wt% carbon doesn't sound like much to nontechnical readers who may momentarily forget how just how much carbon there is in a 5 wt% solution in iron, molar-wise. John Riemann Soong ( talk) 10:01, 12 November 2009 (UTC)
I started to edit some misleading figures in this table but this will be a big project. Firstly it refers to ASTM specifications which are nice for U.S. readers but ignores ISO, JIS or other standards. The table is in ksi and not in SI units. Also the figures are misleading because there is a wide variety of strength grades for gray iron, ductile iron and malleable irons. The same is true for austenitic irons. This needs a lot of work if a table such as this does not have some disclaimers. Also to call it a table of qualities is a biased term. It seems to be a table of mechanical strength properties. Mfields1 ( talk) 02:26, 20 November 2009 (UTC)
While I agree that the unqualified statement on welding should have been modified, I don't think it is a good idea to remove it completely. The problems with welding of any irons within the family of cast irons are 1) the graphite can cause microstructural changes to the matrix that must be accepted or dealt with, 2) suitable filler metals must be used which will rarely or never match the base iron microstructure (leading to strength degradation and sometimes poor color match) and yhe castings can crack if suitable preheating countermeasures are not employed. While cast iron may not be the most difficult alloy to weld it ranks very high in this regard. Mfields1 ( talk) 02:35, 25 November 2009 (UTC)
hi i am asking all of you aut there what is cast iron made of?if you know please post a comment on this talk. —Preceding unsigned comment added by 81.155.219.48 ( talk) 18:03, 2 November 2010 (UTC)
Is the word "flammable" being used correctly in the "Textile mills" section?
According to Strunk & White (third edition, pg 47), the word "inflammable" should be used instead. Anonymous440 ( talk) 19:52, 1 December 2011 (UTC)
"The alloy constituents affect its colour when fractured: white cast iron has carbide impurities which allow cracks to pass straight through..." — Preceding unsigned comment added by 58.106.128.172 ( talk) 12:22, 6 June 2012 (UTC)
It says "magnesium or cerium added to these alloys". It would be helpful to clarify which alloys are being referred to. Thanks. — Preceding unsigned comment added by Craniator ( talk • contribs) 15:14, 8 August 2013 (UTC)
Be aware of the problem that "malleable iron" has two distinct meanings: Either the same as "malleable cast iron" or "wrought iron". I think tne first is American and the second British. 188.178.124.116 ( talk) 11:21, 25 September 2013 (UTC)
Can anyone comment here on whether or not cast iron tends to resist warping under heat (more than certain kinds of rolled steel)?
And, if this is so, it might be worth adding something about this quality of cast iron to the article. Joel Russ ( talk) 06:16, 7 January 2014 (UTC)
"When Abraham Darby II built his furnaces at Ketley and Horsehay in 1766 and 1756 he erected steam engines with cylinder bellows for blowing....[cites other such installations in 1760s]...Even so, the steam engine was not connected directly with the bellows but merely pumped water from a lower to a higher pond, from which it turned a waterwheel operating the bellows with the aid of cams. Many other engines were in use at the time for drainage of the Dale Company's coal pits and the company were involved in making many parts of Newcomen engines for use all ofvr the country. Smeaton seems to have been one of the first to use iron blowing cylinders in a design for the furnaces at Carron in 1768, but even these were powered by a waterwheel." [1]: 124
Referring to the use of recirculating water:
"The first change made by Darby II was the use of the atmospheric engine for this purpose in 1742. This started the gradual development of more powerful blowing engines to supersede the larger and more cumbrous leather bellows which required 120 kg of leather annually." [1]: 123
From reading his book, Professor Tylecote appears to have a very god technical understanding of metallurgy and it's history. Judging from the price, Tylecote, 2nd edition must be good. I have an ex-library copy that I obtained a few years ago at ordinary used book pricing. Phmoreno ( talk) 17:58, 2 September 2018 (UTC)
References
{{
cite journal}}
: Invalid |ref=harv
(
help)