Turbo to manifold studs: 300ZX Inconel or 304SS threaded rod (Hey, Leafy, over here)
#47
In most metal material listings I see, Inconel is usually listed separately from the various SS alloys. I think Inconel used to be a tradename (like Xerox) that ended up getting genericized.
Here's an example. This link shows thermal expansion coefficients which shows why one might prefer Inconel over a heat resistant SS for consistent clamping force in a cast iron manifold/turbine housing application:
Coefficients of Linear Thermal Expansion
For real technical data on the specific alloy in question, I always go to the metal vendor's alloy-specific tech data sheet. There are different alloys with varying properties that are all sold as "Inconel."
Here's an example. This link shows thermal expansion coefficients which shows why one might prefer Inconel over a heat resistant SS for consistent clamping force in a cast iron manifold/turbine housing application:
Coefficients of Linear Thermal Expansion
For real technical data on the specific alloy in question, I always go to the metal vendor's alloy-specific tech data sheet. There are different alloys with varying properties that are all sold as "Inconel."
#49
C'mon Mr. Green, sure I should know. I do know. I have known. I was born knowing.
I'll die knowing.
We ought to be calling the stuff CRES.
Corrosion REsistant Steel is the proper upper class name for the category of metals referred to by the less than privileged by the semi-literate slang term of "stainless steel."
"............ so it is written."
Sorry, I just couldn't resistant....
corky
I'll die knowing.
We ought to be calling the stuff CRES.
Corrosion REsistant Steel is the proper upper class name for the category of metals referred to by the less than privileged by the semi-literate slang term of "stainless steel."
"............ so it is written."
Sorry, I just couldn't resistant....
corky
#51
Inconel - Wikipedia, the free encyclopedia
Wikipedia, yo.
Name was indeed a trademark, so they say...
Wikipedia, yo.
Name was indeed a trademark, so they say...
#52
Thank you! Inconel isn't even kind of stainless steel. One of the interesting properties of inconel is that you can actually control the grain formation such that your part consists of one giant inconel crystal thus eliminating the potential for creep along grain boundaries, great for close tolerance turbine blades.
#53
Shooter,
You appear to be a metalurge. Can you tell me if stainless 718 and inconel 718 are the same thing? I find them cross listed often. They also appear to have the same alloying elements. Several other grades of inconel also cross ref to stainless grades. Iron, chrome, nickel, moly, cu, and some real odd ***** are common to most.
Is grain structure, or the single grain, solely a heat treat process allowed by the alloy, or is workable with various alloys?
I'm not sure all this is terribly pertinent, but it's interesting, nevertheless.
corky
You appear to be a metalurge. Can you tell me if stainless 718 and inconel 718 are the same thing? I find them cross listed often. They also appear to have the same alloying elements. Several other grades of inconel also cross ref to stainless grades. Iron, chrome, nickel, moly, cu, and some real odd ***** are common to most.
Is grain structure, or the single grain, solely a heat treat process allowed by the alloy, or is workable with various alloys?
I'm not sure all this is terribly pertinent, but it's interesting, nevertheless.
corky
#54
HOWEVER, single crystal Nickel based turbine blades are the largest and most common use of "single" crystal mettalic parts applied in industry.
Most of the other single crystal mettalic stuff I've seen is University/Labratory research and don't necessarily have industrial applications.
Tin whiskers are a "neat" example of another type of single crystal (at least in their early growth stages) metallic structure.
#58
Shooter,
You appear to be a metalurge. Can you tell me if stainless 718 and inconel 718 are the same thing? I find them cross listed often. They also appear to have the same alloying elements. Several other grades of inconel also cross ref to stainless grades. Iron, chrome, nickel, moly, cu, and some real odd ***** are common to most.
Is grain structure, or the single grain, solely a heat treat process allowed by the alloy, or is workable with various alloys?
I'm not sure all this is terribly pertinent, but it's interesting, nevertheless.
corky
You appear to be a metalurge. Can you tell me if stainless 718 and inconel 718 are the same thing? I find them cross listed often. They also appear to have the same alloying elements. Several other grades of inconel also cross ref to stainless grades. Iron, chrome, nickel, moly, cu, and some real odd ***** are common to most.
Is grain structure, or the single grain, solely a heat treat process allowed by the alloy, or is workable with various alloys?
I'm not sure all this is terribly pertinent, but it's interesting, nevertheless.
corky
Last edited by shooterschmidty; 01-25-2014 at 01:22 PM.