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Metal and Metallurgy engineering | Forum profile
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Forum profile page for Metal and Metallurgy engineering on http://www.eng-tips.com.
This report page is the aggregated overview from a single forum: Metal and Metallurgy engineering, located on the Message Board at http://www.eng-tips.com.
This forum profile page summarizes the general forum statistics such as: Users Activity, Forum Activity, and Top Authors, which are reported in either a table or graph below for a given reporting time period.
Additional forum profile information for "Metal and Metallurgy engineering" on the Message Board at http://www.eng-tips.com is also shown in the following ways:
1) Latest Active Threads
2) Hot Threads for Last Week
Warning: These statistics are generated using 'best efforts' and can experience delays and reporting errors at times. Please note that such statistics do not constitute a forum's popularity and/or exact posting volumes at any given reporting period.
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Posting activity on Metal and Metallurgy engineering:
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3 Months
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Threads:
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31
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98
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334
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Post:
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878
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Metal and Metallurgy engineering Posting activity graph:
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Top authors during last week:
user's latest post:
Effect of carbon on the 15-5 PH...
Published (2009-12-02 14:03:00)
stanislasdz; Higher carbon content at 0.07% versus 0.03% mass percent means lower impact energy values, and a shift in DBTT toward higher test temperature.
user's latest post:
Heat Treatment - Shaft with Grooves
Published (2009-12-02 14:42:00)
mfgenggear is referring to the Rockwell 15N scale, where 90 HR15N is ~ 60 HRC. The goal is either to measure parts after machining to ensure adequate case depth, or add extra depth requirement to account for any subsequent machining after measurement.
user's latest post:
Heat Treatment - Shaft with Grooves
Published (2009-12-02 18:08:00)
Sorry, I should have been a little clearer in referring to the left side of your your section B-B.
user's latest post:
Help selecting proper in-house...
Published (2009-12-01 14:10:00)
Our original material selection was 4340 but learned that it is prone to through hardening which would cause problems in this application. Our material selection is being driven by the structural properties. Quite honestly, we are very open to other material selections but it seems that we can live with the 8620 properties and it case hardens well so that is where I am at. I guess we...
user's latest post:
Heat Treatment - Shaft with Grooves
Published (2009-12-02 17:27:00)
To unclesyd; The stepped recess in the back of the spline is a mount for a thrust bearing.
user's latest post:
Features in drawn SS tube
Published (2009-11-26 12:44:00)
And I thank you as well. I appreciate your help.
user's latest post:
Methods to reduce Residual...
Published (2009-12-01 11:57:00)
Hi ORnerd Well maybe the cause is creep as suggested by seymours2571. Well whats the cheapest option a stronger grade of material or changing the radius on the existing one. I think you should try the latter first and I still think its not good practice to bend a piece of material with a radius less then its thickness. desertfox
user's latest post:
MSS SP55 - Type XI - cause?
Published (2009-11-24 13:03:00)
So basically this weld wasn't cleaned up properly after being put down?
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Latest active threads on Metal and Metallurgy engineering::
Started 1 day, 6 hours ago (2009-12-03 10:47:00)
by TVP
ASM HANDBOOK Volume 4 Heat Treating has an article on this method. You can download just this article for $20, or purchase the whole book for ~ $200. I'm not sure if there are any other suppliers for this type of material in the USA, so if you are happy so far with Park, I suggest continuing with them.
Started 2 days, 22 hours ago (2009-12-01 19:19:00)
by mfgenggear
mtipg what qty? The stock removal will depend the type of Heat treat & depth of effective case. for gas carburize At .020 case .004 stock removal At .030 case .005 stock removal At .060 case .007 stock removal deeper the case the more parts are apt to distort. because of the longer carburize cycle. there fore allow for more stock removal. the case hardness must be held at 15N 90.2 @ .005 ...
Started 19 hours, 29 minutes ago (2009-12-03 22:09:00)
by metengr
Quote: I'm in the process of designing something that will be subject to fatigue. Cycles will quickly exceed 10^6 cycles, and even 10^8 cycles will come along all to quickly As long as you select a stress amplitude that is safely below the endurance limit of 304 stainless steel, you can accommodate an infinite number of cycles. The reported endurance limit (in bending) for annealed 304 is...
Started 3 days, 7 hours ago (2009-12-01 10:23:00)
by mcguire
( The alloy has Nb to combine with the carbon. Thus, the absolute carbon level is less important than the uncombined carbon \(i.e. that in excess of 10 x the Nb level\). This amount will lower the Ms temperature and produce retained austenite which would reduce the yield strength slightly. , )
Started 2 days, 4 hours ago (2009-12-02 13:21:00)
by metengr
ASME B&PV Code, Section VIII, Div 1, Part UNF-65.
Started 3 days, 4 hours ago (2009-12-01 12:46:00)
by metengr
viper6383; What is the intended service or application of the part(s) that would exclude other surface treatment options, like carburizing?
Started 4 days, 2 hours ago (2009-11-30 15:31:00)
by desertfox
hi ORnerd Can you post a sketch of how the roller loads the legs? An increased bend radius will certainly reduce the stresses at the bend, in fact in practice you should not use a bend radius less then the thickness of the material. desertfox
Started 2 weeks, 5 days ago (2009-11-14 21:41:00)
by rneill
You might try a quick google search on something like this. I found this as the first link up ... http://www .suppliers online.com /propertyp ages/Alloy 355.asp#Re latedNames
Started 1 week, 1 day ago (2009-11-26 09:03:00)
by metengr
will123123; This appears to be corrosion attack of the ID tube surface. The surface is highly irregular and looks like there must have been a contaminant present if this is the only surface that was affected. I have seen both stress corrosion cracking and intergranular oxidation appear like this without further investigation. What was the appearance of the OD surface? Can you come back ...
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Hot threads for last week on Metal and Metallurgy engineering::
Started 1 week, 1 day ago (2009-11-26 09:03:00)
by metengr
will123123; This appears to be corrosion attack of the ID tube surface. The surface is highly irregular and looks like there must have been a contaminant present if this is the only surface that was affected. I have seen both stress corrosion cracking and intergranular oxidation appear like this without further investigation. What was the appearance of the OD surface? Can you come back ...
Started 2 days, 22 hours ago (2009-12-01 19:19:00)
by mfgenggear
mtipg what qty? The stock removal will depend the type of Heat treat & depth of effective case. for gas carburize At .020 case .004 stock removal At .030 case .005 stock removal At .060 case .007 stock removal deeper the case the more parts are apt to distort. because of the longer carburize cycle. there fore allow for more stock removal. the case hardness must be held at 15N 90.2 @ .005 ...
Started 3 days, 4 hours ago (2009-12-01 12:46:00)
by metengr
viper6383; What is the intended service or application of the part(s) that would exclude other surface treatment options, like carburizing?
Started 1 day, 6 hours ago (2009-12-03 10:47:00)
by TVP
ASM HANDBOOK Volume 4 Heat Treating has an article on this method. You can download just this article for $20, or purchase the whole book for ~ $200. I'm not sure if there are any other suppliers for this type of material in the USA, so if you are happy so far with Park, I suggest continuing with them.
Started 3 days, 7 hours ago (2009-12-01 10:23:00)
by mcguire
( The alloy has Nb to combine with the carbon. Thus, the absolute carbon level is less important than the uncombined carbon \(i.e. that in excess of 10 x the Nb level\). This amount will lower the Ms temperature and produce retained austenite which would reduce the yield strength slightly. , )
Started 4 days, 2 hours ago (2009-11-30 15:31:00)
by desertfox
hi ORnerd Can you post a sketch of how the roller loads the legs? An increased bend radius will certainly reduce the stresses at the bend, in fact in practice you should not use a bend radius less then the thickness of the material. desertfox
Started 1 week, 2 days ago (2009-11-25 16:02:00)
by juergenwt
sammyty - Go here: http://www.matweb.com/search/PropertySearch.aspx
Started 2 weeks, 5 days ago (2009-11-14 21:41:00)
by rneill
You might try a quick google search on something like this. I found this as the first link up ... http://www .suppliers online.com /propertyp ages/Alloy 355.asp#Re latedNames
Started 19 hours, 29 minutes ago (2009-12-03 22:09:00)
by metengr
Quote: I'm in the process of designing something that will be subject to fatigue. Cycles will quickly exceed 10^6 cycles, and even 10^8 cycles will come along all to quickly As long as you select a stress amplitude that is safely below the endurance limit of 304 stainless steel, you can accommodate an infinite number of cycles. The reported endurance limit (in bending) for annealed 304 is...
Started 2 days, 4 hours ago (2009-12-02 13:21:00)
by metengr
ASME B&PV Code, Section VIII, Div 1, Part UNF-65.
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