D-Monel Mech. Properties 2

[duddini]

Hi all;

I've tried to find, unsuccesfully, the mechanical properties (tensile and yield mainly) for Monel, A494, Grade M-25S. The ASTM spec has no data for this alloy other than hardness. I believe the Federal Spec for this is QQ-N-288 Comp. D, but again no data. Hours of web searching for more info on this casting grade was a no-go.

Can anyone point me in a direction I haven't looked ??

Thanks,
Bob

 

[metengr]

This also peaked my curiosity. This is S-Monel, Grade M-25S under ASME SA-494. There are no mechanical properties listed under this specification.

 

[metengr]

I did find some additional information on Monel M-25S material;

Composition as listed in the Table;
C - < 0.25%
Cu - 30%
Fe - < 3.5%
Si - 4%
Ni - Bal

Mechanical Properties
YS 0.2% min 415 MPa
UTS min 690 MPa

Ref translate page;

http://www.fondinox.com/leghebasenichel.htm

 

[duddini]

Thanks metengr;

This is the info I was looking for, curious the ASTM spec has chemical composition info but no mechanical props, I wonder why ? Anyway, I am trying to find a non-magnetic replacement for 15-15LC that I can cast ($ issue), and the foundry reccomended this, but had no info on it

Thanks again,
Bob

"You can observe a lot just by watching"
Yogi Berra

 

[bruv]

We have two references to other grades on our database. Chemistries are roughly the same as M25S.

Alloy 505: 0.2% proof 560MPa min, Tensile 830MPa min, 1% elongation min, 275-350HB or 29-38HRC

Alloy 350: 0.2% proof 500MPa min, Tensile 800MPa min, 1% elongation min, 300-350HB

Bruv

 

[kenvlach]

The Nickel Institute

http://www.nickelinstitute.org/

has 732 papers for "Nickel Copper."
The one below has the mechanical properties of Nickel-Copper Alloy 505 (QQ-N-288, Comp. D) in the as-cast, annealed and annealed+aged [hardened] conditions.
NiDI Technical Paper 515 - SOME NICKEL-COPPER CASTING ALLOYS -- ENGINEERING PROPERTIES (1969)
"Presents chemical, physical and mechanical properties of nickel-copper casting alloys 410, 411, 505 and 506. Discusses their high strength and toughness and excellent resistance to corrosion by a variety of chemicals and marine environments. Includes information on heat treating, machining and joining."

http://www.nickelinstitute.org/index.cfm/ci_id/3125/la_id/1/tecArticle/1

I entered the following before bruv's post that Monel S = Alloy 505. The data agrees with that from above except for hardened condition elongation, which I've noted. Also, some yield strengths for this alloy are for 0.5% strain.

MONEL,S,[As-]CAST
Tension Ultimate .... 120-145 Ksi
Tension Yield Point .. 80-130 Ksi
Modulus of Elasticity .. 24.1 Million psi
Elongation % .......... 1-4 %

http://www.martinsprocket.com/PDF/metalprop.pdf

NICKEL BASE ALLOYS
TYPICAL HARDNESS VALUES AND SEPARATELY CAST TEST BARS
Monel S
Condition Hardened 120 [Annealed + Aged]
Tensile Min. 120 (KSI)
Yield Min. 85 (KSI)
Approx. Elong. 0 % [other sources give 1-3%]
Hardness Max. Rc 38 [BHN 300-380]

http://www.dameron.net/images/DAF_alloyGuide.pdf

 

[duddini]

Thanks everyone. The nomenclature for some of the Monel alloys is a bit confusing. I feel good now about using monel-s in place of the 15-15LC.
Thanks for the links kenvlach, I must have hit >50 sites during my search, but I missed these.


"You can observe a lot just by watching"
Yogi Berra

 

[EdStainless]

Is 65% Ni really any less money than 15-15?
This doesn't sound right.

Just remember, these are low stength alloys.
They do look nice.

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[kenvlach]

EdStainless must be right; the foundry maybe suggested in their own be$t interest. Monel usage has steadily declined over the past 50 years due to better performance/price of newer SS's, aluminum bronzes, etc. Probably why the Monel-S data was hard to come by and why it's not sold by Special Metals (with INCO's rights). Also, other Monels may be better choices (although I don't know how castable).

http://www.specialmetals.com/products/

For seawater resistance, even titanium may be less expensive since probably much less weight needed.
What is your application?

 

[bruv]

We have been casting ASTM A494 M35-1, M35-2, M25S and M30C successfully for many years. Like all things, it's easier when you know what you're doing...