18Ni300 powder is a maraging steel feedstock used primarily in metal additive manufacturing processes such as laser powder bed fusion (LPBF). It is selected for parts that need a combination of high strength after heat treatment, good dimensional precision, and the ability to produce complex geometries. The “18Ni” designation refers to its nominal nickel content, while “300” refers to a strength class associated with the material after suitable processing—not a guaranteed property of the powder as supplied. At JINGYE, we recommend evaluating the powder together with the printing process, heat-treatment route, part requirements, and documentation before purchase.
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18Ni300 is a precipitation-hardening maraging steel that develops its final strength through an aging treatment after manufacture. In metal 3D printing, it is supplied as a metal powder and processed layer by layer, commonly by LPBF. The process can produce internal channels, conformal cooling features, and other geometries that may be difficult or costly to machine from solid stock. Its suitability still depends on whether the part’s design, operating environment, and qualification requirements match the material and process.
The name 18Ni300 is a useful grade identifier, but buyers should not treat it as a complete chemical specification. A commonly referenced composition range for this family includes approximately 17–19 wt% nickel, while limits for carbon and other alloying elements depend on the governing specification and supplier’s declared chemistry. The grade is also commonly associated with 1.2709; purchasers should verify the exact designation and requirements stated on the quotation and certificate. We advise specifying the standard or agreed chemistry limits rather than relying on a name alone.
Particle-size distribution is one of the first purchasing details to confirm because it must suit the target machine and powder-handling system. For LPBF, a nominal range such as 15–45 µm is commonly encountered, but this is an example, not a universal requirement or a promise that every 18Ni300 powder uses that range. Buyers should also request relevant information on morphology, flowability, apparent density, oxygen or other impurity limits, and test methods where these are important to their process. Compare results against the machine supplier’s recommendations and your own validated process window.
18Ni300 powder is often considered for tooling inserts, injection molds, die-casting tooling, and other components where strength and complex geometry are important. Additive manufacturing can make it practical to place cooling channels closer to a tool’s working surface, subject to design, build, and finishing constraints. The alloy may also be considered for fixtures and precision engineering parts that benefit from a high-strength maraging steel. Application suitability must be confirmed against the actual load, temperature, wear, corrosion, and service-life requirements.
Consider 18Ni300 when the part can benefit from a combination of additive design freedom and post-build aging, and when the required service conditions are compatible with the alloy. It may be especially relevant when internal features or customized tooling geometry provide a clear functional benefit over conventional manufacturing. Before choosing it, review whether the component needs a specific surface finish, fatigue performance, or resistance to a particular environment. These needs may require machining, surface treatment, or validation beyond the powder purchase.
18Ni300 is not automatically the best material for every metal-printed component. If corrosion resistance, high-temperature performance, biocompatibility, or a different combination of strength and ductility is central to the application, compare suitable alternatives with an engineer and the machine provider. Powder and printed-part requirements can also differ from those for wrought or conventionally manufactured material. Confirm that the selected grade is acceptable under the customer’s design rules and qualification process.
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Start with the component’s function rather than a powder specification sheet. Record the required mechanical properties, operating temperature, load type, dimensions, surface requirements, and any regulatory or customer requirements. Also establish whether the part will be aged, machined, polished, or otherwise post-processed. This information gives suppliers enough context to discuss a relevant powder specification and supporting documentation.
Confirm compatibility with the printer’s recoater, layer thickness, and powder handling requirements. Ask for the stated particle-size distribution and the measurement method, then check whether it aligns with the machine manufacturer’s guidance and your qualified process. Request available batch-level test data for chemistry and other agreed powder characteristics. Where powder will be reused, establish how refresh rates, sieving, storage, and acceptance checks will be controlled in your operation.
Maraging steel obtains its intended properties through a controlled post-build route, but the right schedule depends on the part, printing conditions, and required outcome. An aging treatment around 490°C for several hours is used in some 18Ni300 processing routes, but this is not a universal instruction or a guaranteed recipe for every printed component. Follow a validated procedure from the material or machine documentation and confirm results through appropriate testing. Do not infer finished-part performance solely from the alloy designation or powder certificate.
Before ordering, identify what documents your quality system requires, such as a certificate of analysis, lot identification, safety information, or agreed inspection records. Confirm that the supplied batch can be traced through packaging and shipment documents. If the material will be used in a qualified production process, discuss change control, retained samples, and the documentation expected for repeat orders. Requirements vary by industry and customer, so define them before purchase rather than assuming they are included.
18Ni300 powder pricing depends on factors such as order quantity, agreed chemistry and particle-size requirements, testing, packaging, and shipping destination. Minimum order quantity and lead time are supplier- and order-specific; they can also change with stock status, production planning, and export arrangements. We recommend requesting a quotation that states the powder specification, quantity, documentation, packaging, delivery terms, and quotation validity. This makes offers easier to compare and reduces the risk of evaluating different supply scopes as if they were equivalent.
At JINGYE, we support B2B buyers by clarifying powder requirements and preparing supply proposals around the requested grade, quantity, packaging, and documentation scope. Availability, lead time, and testing arrangements should be confirmed for the specific order rather than assumed from a general product description. When contacting us, share your printer or process requirements, target particle-size range, expected quantity, destination, and documentation needs. This allows us to respond with a more relevant quotation and identify any specification details that need agreement.
18Ni300 powder can be a strong candidate for metal 3D printing when the application benefits from maraging steel properties, additive design freedom, and a validated post-build treatment route. The practical choice depends on more than the grade name: buyers should align chemistry, particle-size distribution, process compatibility, traceability, and finished-part requirements. The next step is to prepare a purchase specification and share it with potential suppliers for review. Contact JINGYE with your required grade, powder size, quantity, delivery destination, and documentation expectations to discuss a suitable supply proposal.
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