UNS K92890 / AMS 6512 / Maraging 250 Steel(18Ni250)
Products Description
Maraging 250 (18Ni-250) is an ultra-high-strength, age-hardening steel used primarily in aerospace, precision molds, high-strength shafts, and critical structural components. It is not a nickel-based superalloy, but rather a special steel with iron as the base metal and nickel, cobalt, and molybdenum as the main alloying elements. AMS 6512 mainly covers bars, forgings, tubes, and forging blanks.
Applicable Standards and Supply Profiles
UNS K92890
AMS AMS 6512
Bars
Forgings
Mechanical Tubing
Flash Welded Rings
Forging Stock.
Surface: Bright / Peeled / Ground
Heat Treatment: Annealed
chemical composition
| Element | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | Ti | Zr* | B* | Co | Al | Ca* |
| Min. | -- | -- | -- | -- | -- | -- | 18.0 | -- | 4.60 | 1.30 | -- | -- | 11.5 | 0.05 | -- |
| Max. | 0.03 | 0.10 | 0.10 | 0.01 | 0.01 | 0.50 | 19.0 | 0.50 | 5.20 | 1.60 | 0.02 | 0.03 | 12.5 | 0.15 | 0.05 |
* Allowed elements to be added and should be noted in the final smelting analysis report.
Physical properties
Annealed state
| Performance Item | Typical Values |
| Density | 8.08 g/cm3 |
| Melting Range | 1427~1471 °C |
| Specific Heat | 460 J/(kg·K) |
| Poisson's Ratio | 0.3 |
| thermal conductivity | 25.2 W/(m·K) |
Mechanical properties
| Performance Items | Typical Values |
| Tensile strength | 1172MPa |
| Yield strength | 827 MPa |
| Hardness (Rockwell/Britt) | HRB108 / HB 319 |
| Elongation at break | 18% |
| Reduction of area | 70% |
Typical Advantages
Ultra High Strength
After aging treatment, it exhibits a tensile strength exceeding 1750 MPa.
High yield strength, suitable for high-load structural components.
Excellent strength-to-weight ratio.
Excellent Toughness
It maintains good fracture toughness even at ultra-high strength levels.
Its impact resistance is superior to many traditional ultra-high strength steels.
Dimensional Stability
Employing an age-hardening mechanism instead of traditional quenching
Minor deformation during heat treatment
Suitable for manufacturing precision parts and molds
Good Machinability in Annealed Condition
The annealed state has relatively low hardness.
It can be machined by turning, milling, drilling, etc.
Final strength is achieved by aging treatment after machining.
Lork Group
Marketing Operations Department
Email: layla@lorkgroup.com
WhatsApp: +86 199 3707 5488
Hot Tags: Maraging 250 Steel Bar, Maraging 250 Steel Supplier, Maraging 250 Alloy Steel,18Ni-250 Steel, AMS 6512, UNS K92890
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