Material Description
1.2709, a martensite hardenable steel, has a chemical composition corresponding to US classification 18% Ni maraging 300, European 1.2709 and German X3NiCoMoTi 18-9-5. This steel is characterized by having excellent strength combined with high toughness, very good mechanical properties, and being easily heat treatable using a simple thermal age hardening process to obtain excellent hardness and strength. Maraging steel 1.2709 is easily machinable after the building process, and can be easily post hardened to more than 50 HRC by age hardening at 490°C (914°F) for six hours. Parts in both states of built and age hardened, can be machined, spark eroded, welded, micro shot peened, polished, and/or coated if required. The layer wise building method gives the parts a certain anisotropy, which can be reduced or removed by using appropriate heat treatment methods.
Material Properties
High strength and toughness Excellent mechanical properties
Easy to treat and machinable Can be highly polished
Applications
1.2709 is used for a range of applications where exceptional tensile strength and hardness are required, and therefore lends itself to tooling applications. Specific examples are tool insets for injection molding and die-casting, as well as functional components. This material is ideal for tooling applications and for high performance industrial and engineering parts, for example in aerospace and motor racing applications.
Composition of Powder (ASTM A538/A579)
Element | Chemical Formula | Chemical Composition (%) | CAS NO. |
Carbon | C | ≤0.03 | 7440-44-0 |
Silicon | Si | ≤0.1 | 7440-21-3 |
Molybdenum | Mo | 4.5-5.2 | 7439-98-7 |
Titanium | Ti | 0.6-0.8 | 7440-32-6 |
Sulphur | S | ≤0.01 | 7704-34-9 |
Manganese | Mn | ≤0.1 | 7439-96-5 |
Nickel | Ni | 17.0-19.0 | 7440-02-0 |
Cobalt | Co | 8.5-9.5 | 7440-48-4 |
Phosphorus | P | ≤0.01 | 7723-14-0 |
Aluminum | Al | 0.05-0.15 | 7429-90-5 |
Chromium | Cr | ≤0.05 | 7440-47-3 |
Copper | Cu | ≤0.05 | 7440-50-8 |
Iron | Fe | Bal | 7439-89-6 |
Mechanical Properties of Additive Manufactured Components
As Built | Heat Treated (Age) (Remark 5) | |
Tensile Strength (Remark 3) | ||
| Horizontal Direction (XY) | 1100MPa ±100MPa | 2020MPa ±100MPa |
| Vertical Direction (Z) | 1100MPa ±100MPa | 2020MPa ±100MPa |
Yield Strength (Remark 3) | ||
| Horizontal Direction (XY) | 1050MPa±50MPa | 1950MPa±100MPa |
| Vertical Direction (Z) | 1000MPa±100MPa | 1950MPa±100MPa |
Elongation at Break (Remark 3) | ||
| Horizontal Direction (XY) | 10%±4% | 5%±2% |
| Vertical Direction (Z) | 10%±4% | 5%±2% |
Modulus of Elasticity (Remark 3) | ||
| Horizontal Direction (XY) | 160GPa±30GPa | 180GPa±20GPa |
| Vertical Direction (Z) | 150GPa±20GPa | 170GPa±20GPa |
Hardness HRC (Remark 4) | 30-40 | 50-55 |
Note:
1. The hollow ratio of the printed part is below 0.5%, and the component density is above 99.5%, normally at 99.7-99.9%.
2. Particle size distribution optimized to suit specific machine platforms and process types (i.e., SLM, EBM, LMD, etc.) Custom sizing also available.
3. Full powder qualification including (but not exclusive to) the following: Size Distribution, Flow Properties, Chemistry and Morphology.
Remarks:
1. Metal powders of AMC has been tested on EOS M280/M290/M400, Concept Laser M2, SLM Solutions SLM 125/SLM 280, Trumpf Truprint 1000/ Truprint3000, Renishaw REN AM400, Farsoon FS273M/ FS271M, Eplus EP-M650H/EP-450H/EP-M260/EP-M450D, HBD 200/HBD350 and so on.
2. AMC can customize the chemical composition, particle size, flowability of the metal powders in additive manufacturing.
3. Tested at ambient temperature by Nadcap and UKAS accredited independent laboratory. Test ASTM E8. Machined prior to testing.
4. Tested to ASTM E384-11, after polishing.
5. Aging for 6 hours after heated at 490℃ in the air (or inert gas like argon).
Well-Proportioned PSD
High Sphericity
Low Oxygen Content
Cost Effective
