Materials reference
Maraging Steel MS1
What is it?
Maraging Steel MS1 is a metal alloy selected for particular strength, temperature, weight or manufacturing needs.
Why would someone print it?
Printing may help create complex shapes or low-volume parts, but the complete finishing and inspection route still matters.
What should a beginner know?
- Confirm the exact machine, material settings and acceptance requirements.
- A material listing does not by itself qualify a production part.
What happens after printing?
Printed parts may need heat treatment, support removal, machining, finishing and inspection before they are accepted. Powder feedstock is often the largest consumable in LPBF economics — public powder price evidence, where records exist, is collected by alloy on its own page.
What is an alloy?
What does this mean? An alloy is a defined metal composition. Why does it matter? Composition, process settings and post-processing affect the finished part.
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Technical material evidence
An ultra-high-strength low-carbon iron-nickel-cobalt tool steel that reaches very high strength through a simple, low-temperature aging step with almost no distortion — which makes it the AM answer to tooling problems: inserts, cores, molds and fixtures that need strength plus polished or textured surfaces. The AM-specific catch: the aging treatment is mandatory to reach rated strength, and corrosion resistance is modest, so humid or chemical service needs a coating or material rethink. Confirm the aged condition and the hardness basis of any number quoted to you.
LPBF · process-family reference. Nominal alloy properties and printed-part properties are different evidence — the table and sections below separate what is verified from what needs your qualified process.
| Property | Evidence |
|---|---|
| Designations | 18Ni-250 class W.Nr 1.2709 family (EOS sells separate ToolSteel 1.2709; EN X3NiCoMoTi 18 9 5) - exact equivalence to the listed designation not independently verifiedOEM ↗ · Source reviewed |
| Nominal material density | Density not verified for this alloy |
| Powder price | Current supplier quote required No public powder list price was captured in the supplied source review. Obtain a current supplier quote. |
Post-processing evidence
Two-step: solution anneal + age harden 490C/914F 6 h in vacuum/inert gas (EOS data sheet)
OEM ↗ · Source reviewedThis is a research summary, not a production heat-treatment instruction. Use the current OEM material datasheet, qualified parameter set and application-specific acceptance requirements.
Machine and process compatibility
| Referenced platform | Evidence scope |
|---|---|
| EOS LPBF line | Portfolio evidence only; exact machine, parameters and qualification must be confirmedOEM ↗ · Source reviewed |
Manufacturing considerations
- embrittlement if aging overdone
- Ti/Co burn-off requires powder-refresh discipline
- Hardness designation not independently verified.