Selecting the right material is one of the most important engineering decisions in metal additive manufacturing. The alloy influences not only strength and corrosion resistance, but also thermal performance, weight, wear behaviour, post-processing requirements and ultimately whether a component is suitable for its operating environment.
For Australian manufacturers, mining operators, energy companies, medical technology developers and engineering teams, some of the most relevant metal 3D printing materials include Stainless Steel 316L, Inconel 625 and 718, Ti6Al4V Titanium and Cobalt Chrome.
These alloys can be processed using Laser Powder Bed Fusion (LPBF) to manufacture complex functional components that would be difficult, expensive or sometimes impossible to produce using conventional manufacturing alone.
However, there is no universally “best” metal for additive manufacturing. Material selection must start with the engineering requirements of the component.
Why Material Selection Matters in Metal Additive Manufacturing
A component may need to withstand high mechanical loads, corrosive fluids, elevated temperatures, repeated fatigue cycles or severe wear. Another application may prioritise low mass, biocompatibility or geometric complexity.
These requirements lead to very different material choices.
For example, Stainless Steel 316L can be attractive where corrosion resistance and general-purpose industrial performance are required. Inconel becomes particularly relevant when temperature and aggressive operating conditions are significant. Titanium offers a high strength-to-weight ratio, while Cobalt Chrome combines high strength with wear and corrosion resistance.
Material selection should therefore be considered alongside component geometry, loading conditions, operating temperature, environment, manufacturing process and post-processing requirements.
This engineering-led approach is particularly important in metal additive manufacturing, where material behaviour and process parameters are closely connected.
Stainless Steel 316L for Metal 3D Printing
Stainless Steel 316L is one of the most established materials used in industrial metal additive manufacturing.
Its combination of corrosion resistance, ductility and manufacturing versatility makes it relevant to a broad range of engineering applications.
For Australian industry, 316L can be particularly useful for components exposed to moisture, chemicals and corrosive operating environments.
Typical applications can include:
- pump and valve components;
- manifolds and fluid-handling parts;
- industrial fittings;
- brackets and structural components;
- prototypes and low-volume production parts;
- replacement components for industrial equipment.
Why 316L Works Well with LPBF
316L has become widely adopted in LPBF because it can support both complex geometry and functional industrial applications when an appropriate process window is established.
Additive manufacturing also allows engineers to reconsider the geometry of a conventional stainless-steel component.
Instead of simply reproducing a machined part, engineers can potentially consolidate assemblies, introduce internal channels or remove material from regions where it is not structurally required.
That makes stainless steel 3D printing in Australia relevant not only as a replacement manufacturing process but also as part of a broader design optimisation strategy.
Inconel 625 and 718 for High-Performance Applications
Inconel refers to a family of nickel-based superalloys developed for demanding thermal, mechanical and corrosive environments.
Two grades particularly relevant to metal additive manufacturing are Inconel 625 and Inconel 718.
Although both are nickel-based alloys, they should not be treated as interchangeable materials.
Inconel 625
Inconel 625 is recognised for strong corrosion resistance and performance across demanding environments.
This can make it relevant for applications involving aggressive fluids, chemical exposure, marine environments and energy-sector equipment.
Potential applications include:
- valve and pump components;
- fluid-handling components;
- nozzles;
- manifolds;
- energy equipment;
- corrosion-resistant replacement parts.
Inconel 718
Inconel 718 is particularly important where mechanical performance at elevated temperatures is required.
It is widely associated with demanding aerospace and energy applications, but the same performance characteristics can also be valuable in specialised industrial equipment.
Potential additive applications include high-temperature components, complex fluid systems and parts operating under combined thermal and mechanical loads.
Why Additive Manufacturing Is Relevant to Inconel
High-performance nickel alloys can be challenging and expensive to manufacture conventionally, particularly when significant machining is required.
LPBF builds the component close to its final geometry, which can be advantageous for complex parts and expensive feedstock materials.
The benefit is not simply reduced machining. Additive manufacturing can also enable internal passages, integrated features and geometries that would be difficult to achieve using conventional subtractive processes.
For Inconel 3D printing in Australia, the strongest business case is therefore often found where demanding material requirements coincide with complex geometry, low production volumes or long conventional lead times.
Ti6Al4V Titanium for Metal 3D Printing
Ti6Al4V, often called Ti64 or Titanium Grade 5, is one of the most important titanium alloys used in metal additive manufacturing.
Its key advantage is its combination of high strength and relatively low density.
That makes titanium particularly attractive when reducing component mass has real engineering value.
Applications can include:
- aerospace components;
- medical devices;
- lightweight industrial parts;
- high-performance engineering components;
- specialised tooling;
- complex brackets and structures.
Design Freedom with Titanium LPBF
Titanium becomes especially interesting when material selection and design optimisation are considered together.
If a conventional titanium component is simply reproduced with the same geometry, some of the potential value of additive manufacturing may be lost.
Using Design for Additive Manufacturing (DfAM), engineers can explore topology optimisation, lattice structures and other approaches to place material where it contributes most effectively to component performance.
This can be valuable for applications where every reduction in mass matters.
For this reason, titanium 3D printing in Australia should generally be evaluated as an engineering solution rather than simply as an alternative way to manufacture an existing part.
Cobalt Chrome for Metal Additive Manufacturing
Cobalt Chrome, commonly abbreviated as CoCr, is another important alloy family for metal additive manufacturing.
It combines high strength, corrosion resistance and wear resistance and is particularly well known in medical and dental manufacturing.
However, its relevance is not restricted to healthcare. CoCr can also be considered for specialised engineering applications where wear, strength and corrosion behaviour are important.
Potential applications include:
- medical components;
- dental structures;
- wear-resistant components;
- specialised industrial parts;
- components requiring high mechanical performance.
The E-Metal3D equipment portfolio also lists Cobalt Chrome among materials supported by industrial metal additive manufacturing systems. Emetal 3D
Cobalt Chrome and Medical 3D Printing
Medical manufacturing is one of the areas where Cobalt Chrome has established relevance alongside titanium and certain stainless steels.
Metal additive manufacturing can support geometrically complex medical components and customised structures while LPBF provides a digital manufacturing route from validated geometry to physical metal parts.
Material selection alone, however, does not establish that a component is suitable for clinical use.
Medical applications require consideration of the complete manufacturing and quality framework, including process validation, traceability, post-processing, inspection and the applicable regulatory requirements.
This distinction is important: using a material commonly associated with medical applications does not automatically make an additively manufactured component a compliant medical device.
Comparing Common Metal 3D Printing Materials
A practical first comparison looks like this:
| Material | Key Engineering Characteristics | Typical Application Areas |
|---|---|---|
| Stainless Steel 316L | Corrosion resistance, ductility, versatility | Industrial equipment, fluid systems, replacement parts |
| Inconel 625 | Corrosion resistance, demanding environments | Energy, marine, chemical and fluid-handling components |
| Inconel 718 | High-temperature mechanical performance | Aerospace, energy and high-performance engineering |
| Ti6Al4V | High strength-to-weight ratio | Aerospace, medical and lightweight engineering |
| Cobalt Chrome | Strength, wear and corrosion resistance | Medical, dental and specialised wear applications |
This table is a starting point, not a material-selection specification.
Actual selection should account for the complete service environment and the required properties of the finished component.
Material Selection for Australian Mining Applications
Mining equipment presents a particularly difficult material-selection problem.
Components can be exposed to abrasive material, moisture, corrosive environments, vibration, impact and significant mechanical loading. In addition, downtime can make component availability almost as important as material performance.
Stainless steels and nickel-based alloys can therefore be relevant to selected mining applications, while other materials may be appropriate depending on the component.
The correct question is not:
“Which metal is strongest?”
It is:
“Which material provides the required combination of mechanical, environmental and manufacturing performance for this specific component?”
This is where material selection connects directly with engineering analysis and design optimisation of mining components.
Material Selection for Oil and Gas Components
Oil and gas applications can combine pressure, temperature, corrosive media and demanding service conditions.
This creates potential applications for materials such as Stainless Steel 316L and nickel-based superalloys.
Valves, pump components, manifolds, impellers, heat-transfer components and specialised replacement parts are examples of geometries where additive manufacturing may be evaluated. E-Metal3D’s Oil & Gas industry page similarly identifies valves, impellers, flanges, pump components, heat exchanger parts and manifolds as relevant applications. Emetal 3D
In these environments, however, material choice cannot be separated from engineering qualification.
Pressure requirements, temperature, fluid chemistry, fatigue, corrosion mechanisms and applicable standards must all be considered before selecting a material and manufacturing route.
Materials for Australian Manufacturing
For general manufacturing, material requirements can vary dramatically.
One company may need corrosion-resistant fluid-handling components. Another may need lightweight tooling or a heat-resistant production component. A third may be trying to reproduce an obsolete spare part for equipment that no longer has OEM support.
This is why a broad LPBF material portfolio is useful.
It allows the manufacturing method to be selected around the component requirements rather than forcing every application into a single alloy.
E-Metal3D’s current metal 3D printing service identifies Stainless Steel 316L and 17-4PH, Maraging Steel, Inconel 625 and 718, AlSi10Mg and Ti6Al4V among its material portfolio. Emetal 3D
Material Selection for Obsolete and Replacement Parts
Material selection becomes particularly important when reverse engineering an obsolete component.
A 3D scan can capture geometry, but it does not identify everything an engineer needs to know about the original material.
If drawings and material certificates are unavailable, the replacement-part workflow may require additional investigation to determine the appropriate material and performance requirements.
The objective is not necessarily to duplicate the original material blindly.
The engineering team must determine what properties the replacement component actually needs to deliver.
This may create an opportunity to improve corrosion resistance, reduce mass, simplify the geometry or select a material better suited to the current operating environment.
That makes material engineering an important part of reverse engineering and on-demand spare-parts manufacturing.
Powder Quality Matters as Much as Alloy Selection
Choosing an alloy designation is only part of material selection for LPBF.
The characteristics of the metal powder itself influence processing behaviour.
Relevant factors can include particle-size distribution, morphology, chemistry, flowability, apparent density, contamination control, storage conditions and powder handling.
Consistency is particularly important where a manufacturing process needs to be repeatable across multiple builds.
For this reason, an engineering team evaluating metal additive manufacturing should consider both the nominal alloy and the quality and control of the powder feedstock.
Material Selection Must Consider Post-Processing
The material does not leave an LPBF machine as an automatically finished component.
Depending on the application, subsequent operations can include:
- stress-relief heat treatment;
- solution or ageing treatments;
- support removal;
- CNC machining;
- surface finishing;
- polishing;
- dimensional inspection;
- non-destructive testing.
These processes can influence the final dimensional and mechanical characteristics of the part.
Consequently, engineers should define the required final condition of the component rather than evaluating only the as-built material.
This is especially important for fatigue-critical, high-temperature and precision applications.
Designing Around the Material
One of the most common mistakes in additive manufacturing is treating material and geometry as separate decisions.
They interact.
A topology-optimised titanium component, for example, may exploit titanium’s strength-to-weight characteristics in a way that a direct copy of a conventional component does not.
Similarly, a high-performance nickel alloy may justify its cost where additive manufacturing enables a complex integrated geometry that eliminates multiple components or manufacturing operations.
This is a central principle of Design for Metal Additive Manufacturing: the manufacturing process, geometry and material should be engineered as one system.
Material Selection and Build Orientation
Build orientation is another factor that can interact with material and component performance.
Orientation influences support requirements, surface condition, thermal behaviour and the amount of post-processing required.
Critical surfaces may need machining after printing, while support placement must be considered during the design stage.
Therefore, a successful LPBF project is rarely a simple sequence of:
CAD → choose metal → print.
Instead, design, material, build strategy and finishing requirements are developed together.
When Does a High-Performance Alloy Make Economic Sense?
The most technically capable alloy is not automatically the most economical choice.
Using a premium material where a more conventional alloy satisfies the engineering requirements can unnecessarily increase component cost.
Conversely, selecting a cheaper material that performs poorly in the operating environment can increase maintenance, replacement frequency and downtime.
A better assessment considers lifecycle performance.
For an industrial component, that can include:
material cost + manufacturing + post-processing + inspection + expected service life + downtime risk.
This is particularly relevant for Australian mining and energy operations, where the cost of an unavailable or failed component may significantly exceed its manufacturing cost.
From Material Selection to Production
A robust metal additive manufacturing workflow typically begins with the application rather than the printer.
Engineers first define the functional requirements of the component, including loading, temperature, environment, corrosion exposure, weight constraints and dimensional requirements.
A suitable alloy can then be shortlisted.
The geometry is assessed for additive manufacturing and, where appropriate, redesigned using DfAM principles. Build orientation, supports and process parameters are considered before production.
After printing, the component moves through the required post-processing and inspection stages.
This workflow ensures material selection remains connected to the performance requirements of the finished part.
Choosing a Metal 3D Printing Material in Australia
When evaluating metal 3D printing materials Australia has a diverse range of industrial applications, but material selection should still begin with five fundamental engineering questions:
- What mechanical loads must the component withstand?
- What temperature and environment will it operate in?
- Is corrosion, wear or weight a major design driver?
- What post-processing and inspection will be required?
- Does additive manufacturing create enough technical or commercial value for this component?
If these questions are addressed early, material selection becomes part of a structured engineering decision rather than a catalogue choice.
Metal Additive Manufacturing Materials at E-Metal3D
E-Metal3D supports Australian companies across the broader metal additive manufacturing workflow, including material selection, engineering, DfAM, reverse engineering and LPBF production.
Our current metal 3D printing portfolio includes materials such as Stainless Steel 316L, Stainless Steel 17-4PH, Maraging Steel, Inconel 625, Inconel 718, AlSi10Mg and Ti6Al4V. Our industrial systems also support broader alloy families including Cobalt Chrome, depending on machine configuration and application requirements. Emetal 3D
Rather than selecting a material in isolation, the objective is to match the alloy, geometry, manufacturing process and post-processing route to the actual engineering requirements of the component.
If your organisation is evaluating a new metal 3D printed component, an obsolete spare part or an existing design that may benefit from additive manufacturing, E-Metal3D can assess the application and help determine an appropriate engineering and manufacturing pathway.
What are the most common metal 3D printing materials?
Common industrial LPBF materials include stainless steels, nickel-based superalloys such as Inconel, titanium alloys, aluminium alloys, tool and maraging steels, and Cobalt Chrome. The appropriate alloy depends on the component’s operating environment and performance requirements.
Is Stainless Steel 316L suitable for metal 3D printing?
Yes. 316L is widely used in LPBF and is particularly useful for industrial components requiring corrosion resistance, ductility and general-purpose mechanical performance.
What is the difference between Inconel 625 and Inconel 718?
Both are nickel-based superalloys, but they are selected for different engineering requirements. Inconel 625 is particularly associated with corrosion resistance, while Inconel 718 is widely used where high mechanical performance at elevated temperatures is required.
Can Inconel be 3D printed in Australia?
Yes. Industrial LPBF systems can process qualified Inconel powders, including alloys such as Inconel 625 and 718. Suitability still depends on component requirements, process qualification and the required finished condition.
Can titanium be metal 3D printed?
Yes. Ti6Al4V is one of the most established titanium alloys for LPBF. Its high strength-to-weight ratio makes it particularly relevant to aerospace, medical and high-performance engineering applications.
What is Cobalt Chrome used for in metal 3D printing?
Cobalt Chrome is used where high strength, corrosion resistance and wear performance are required. It is particularly well known in medical and dental manufacturing, with additional potential in specialised industrial applications.
Which metal is best for mining components?
There is no single best alloy for all mining components. Material selection depends on wear, corrosion, mechanical loading, temperature, geometry and other service conditions. The decision should be made for the specific component and operating environment.
Which metal is best for high-temperature 3D printed parts?
Nickel-based superalloys such as Inconel 718 are frequently considered for high-temperature applications, but the appropriate material depends on the actual temperature range, mechanical loading, environment and required service life.
Does metal powder quality affect 3D printing?
Yes. Powder chemistry, particle characteristics, flowability, contamination control and consistency can affect LPBF processing and repeatability. Powder quality therefore forms part of the overall manufacturing process.
How do I choose a material for an LPBF component?
Start with the component’s functional requirements: loads, temperature, corrosion exposure, wear, weight, dimensional requirements and required service life. Material selection should then be assessed together with geometry, LPBF processability, post-processing and inspection requirements.
