Full Transcript:
What’s up guys? This is Michael with Michael Talks Metals back for more maraging madness! Today our Video topic is another of the Maraging family of steel alloys. Before we jump in, if you like the video SMASH that like button and if you feel so inclined and have yet to do so, please subscribe. It would help support the channel and for that, we’d be grateful! Let’s do this! Today our Video topic is another of the Maraging family of steel alloys.
Like the other members of this family, Maraging 250 is a high strength Iron base alloy of Nickel, Cobalt, and Molybdenum. The addition of Titanium and Aluminum provide the ability to age harden with a simple low temperature heat treatment. UNS designation for this alloy is K92890.
A stable low carbon martensitic structure provides good fabricability in the solution treated or annealed condition and can be readily welded.
In aerospace applications it is used for parts requiring high strength with toughness in the final heat treated condition and is Consumable Electrode Melted for cleanliness to AMS 2300 quality requirements.
Both the annealed and solution treated conditions create a stable martensitic structure and would normally be performed at the producing mill.
Typical age hardening of the fabricated parts is performed at 900 deg F for 4 to 6 hours at temperature to develop the high strength final condition.
| Maraging 250 Chemistry UNS K92890 | |
|---|---|
| Carbon | 0.03 % Max |
| Manganese | 0.10 % Max |
| Phosphorus | 0.010 % Max |
| Sulfur | 0.010 % Max |
| Silicon | 0.10 % Max |
| Nickel | 17.00 – 19.00 % |
| Cobalt | 7.00 – 8.50 % |
| Molybdenum | 4.60 – 5.20 % |
| Titanium | 0.30 – 0.50 % |
| Aluminum | 0.05 – 0.15 % |
| Iron | Balance |
Density: point 290 lbs per cubic inch
Mechanical Properties after aging at 900 F – Longitudinal
Bars up to 4 inches
Tensile Strength ……… 255,000 psi Minimum
Yield Strength ………… 250,000 psi Minimum
Elongation …………….. 6 % Minimum
Reduction of Area ….. 45 % Minimum
| Maraging 250 Specifications | |
|---|---|
| AMS 6512 | Bars, Forgings, Tubing, and Rings – CEVM, Annealed |
| AMS 6520 | Sheet, Strip, and Plate; CE, Solution Treated |
| MIL – S- 46850 | All grades of Maraging |
As we have told our viewers many times before, specifications, prints, and part requirements can add to or alter the information we have presented to you today….So for time 61 CHECK THE SPECS, twice.
So this is Michael with Michael Talks Metal, thanks for tuning in. Michlin Metals is a supplier of and Distributor of Maraging 250. For more info on Maraging – Visit us at or website… michlinmetals.com. If you made it this far and haven’t subscribed, please consider doing so now. If you missed our previous video, click here. Thanks for watching and I will see you next week Thursday, 10am. Michael’s done talkin metal for today, I’m out!
