Elevated Properties of Steel and Stainless Steel

[Wicsteve]

Has anyone run across published physical property data for steel and/or stainless steel at high evevated temperatures? We're attempting to input steel property data into a FEA analysis for a muffler. Steel temperatures run in the 1000F neighborhood in these applications.

 

[cloa]

Which steels/ stainless steels? Be a bit more specific.

 

[metengr]

Mechanical property data for elevated temperature service is available from ASME B&PV Code, Section II, Part D, and from the public domain on the internet regarding published papers on "Elevated Temperature Properties of Steel and Stainless Steel"

 

[arunmrao]

For mufflers it is normally 410 grade stainless steels. Look up for properties of this alloy.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[blacksmith37]

A point of detail; exhaust grades are ferritic- 405, 409, 410S and.....

 

[Wicsteve]

Thanks everyone

First, I think that I've found enough information to satisfy my immediate needs. So thiank you.

I had hoped to find an authoritavie resource or study that specifically address high temperature strength properties of sheetmetal type materials. Often, published high temperature data is for structural steels used in buildings are are specifically related to strength requirememts during fires. There is some data out there on specific high temperature use steels, or stainless but much of that info on the internet has been generalized, published by company marketing departments, or else not specific to steel types that are in everyday use for small engine exhaust systems.

To answer the question about types of steel, we use 304, 409, 430, stainless materials and also aluminized CRS materials of which base steel is probably of a commercial steel (?) type.

 

[EdStainless]

ASM publishes a High Temperature Properties of Ferrous Alloys.
It is the best source. Most data is older but it has all be reviewed.
I'll get the ISBN when I get home.

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Plymouth Tube

 

[mcguire]

Go to AK Steel website. They are the top producer and they put out lots of data.

Michael McGuire

http://stainlesssteelforengineers.blogspot.com/

 

[CalvinKelly]

Temperatures around 1000F can severely embrittle ferritic or martensitic stainless grades with 12% or more chromium. Specifically, 430 and 410 will both suffer "885F embrittlement", while type 409 ~11%Cr is supposedly immune to this embrittlement.

Be really cool to know for exactly what grades you need data . . . there is no such thing (pretty much) as 304, most is dual certified 304L/304 adjusted to meeet the 304 min yield requirements. Or else dual certified 304/304H, carbon level to meet both specs.

I put a lot of effort into getting together accurate data for Rolled Alloys data sheets before I retired. There is a lot of data available. I also have had some doubts about marketing-published data but managed to sort it out. The Swedes tend to be honest.

And after looking up all the fine tensile & modulus properties I must tell you that 80-90% of all high temperature failures I investigated over three decades were because the designer, or the installer, failed to recognize that metals will expand with heat. One may permit the metal to expand freely, or else watch it bend, crack or tear. Data is nice but recognizing, and allowing for, thermal expansion is make or break. In my experience it is nearly impossible to convince a degreed engineer of this. Small farmers and Skilled Tradesmen do tend to understand.

Cheers!

James Kelly

http://www.rolledalloys.com

 

[Maui]

In Chapter 12 of my book I provide a general comparison of the hot strength characteristics of austenitic, martensitic, and ferritic stainless steels with those of low-carbon unalloyed steel and semiaustenitic precipitation- and transformation-hardening steels. This is shown in Figure 12.7. Note that this data is graphical in nature, not tabulated. In Chapter 17 I discuss at length the exhaust system of an automobile as an example in the design considerations for engineering systems. It may be of use to you. You can access the link to the book by clicking on the website at the bottom of my signature.

Maui

http://www.EngineeringMetallurgy.com