A complete guide to stainless steel 3D printing, covering material options, technologies, costs, design tips, and how to compare service providers.
Introduction
From automotive components and medical instruments to industrial equipment and machinery, stainless steel is widely used for parts that need to withstand demanding conditions. Its combination of strength, durability, and corrosion resistance makes it a practical choice for applications where long-term performance matters.
Stainless steel 3D printing combines these material properties with the design flexibility of additive manufacturing. Complex geometries, internal channels, thin walls, and customized components can be produced directly from a 3D CAD model, making the process particularly useful for prototypes, custom parts, and low-volume production where conventional tooling may not be practical.
In this guide, we'll look at the main stainless steel grades used for 3D printing, available printing technologies, cost factors, design considerations, and how to choose a suitable stainless steel 3D printing service provider for your project.
Why 3D Print Stainless Steel?
Stainless steel 3D printing offers greater design flexibility and can be a practical option for complex, customized, and low-volume parts. Its advantages become clearer when compared with traditional manufacturing and considered alongside the unique properties of stainless steel itself.
3D Printing vs. Traditional Manufacturing
Aspect | 3D Printing | Traditional Manufacturing |
|---|---|---|
Design Freedom | Complex geometries and internal channels | Limited by tooling and machining |
Production Speed | Fast production without molds | Longer setup and tooling time |
Cost | Cost-effective for small batches | Higher tooling costs |
Material Waste | Minimal material waste | More scrap from machining |
Part Integration | Complex parts in one piece | Often requires assembly |
On-Demand | Produce parts as needed | Requires inventory planning |
Why Choose Stainless Steel as Your Printing Material?
Stainless steel offers a combination of properties that makes it suitable for functional 3D printed parts across a wide range of industries. Depending on the grade, it can provide:
Excellent Corrosion Resistance: Stainless steel offers good resistance to rust, chemicals, moisture, and other corrosive environments. Grades such as 316L are particularly well suited to marine, medical, and industrial applications.
High Strength and Toughness: Stainless steel provides high tensile strength, toughness, and durability, making it suitable for functional components that need to withstand mechanical loads and repeated use.
Biocompatibility and Sterilization Resistance: 316L stainless steel is widely used in medical and healthcare applications because of its corrosion resistance and suitability for repeated sterilization and biological-contact environments.
Heat and Wear Resistance: Depending on the grade and operating conditions, stainless steel can maintain its mechanical performance under elevated temperatures and resist wear in demanding applications.
Applications of Stainless Steel 3D Printing
Stainless steel 3D printing is transforming the way industries design and manufacture metal parts. Its unique combination of strength, durability, and design flexibility makes it suitable for a wide range of applications.
1. Aerospace & Automotive
Key Properties: High strength-to-weight ratio, temperature and corrosion resistance.
Typical Uses:
Aerospace: Engine components (turbine blades, fuel nozzles), structural parts (brackets, mounts), tooling (jigs, fixtures).
Automotive: Engine and exhaust components (manifolds, valves), custom parts (brackets, connectors), prototyping.
Why It’s Suitable: Stainless steel's strength and heat resistance are essential in both aerospace and automotive industries. 3D printing allows for the creation of intricate, lightweight designs, rapid prototyping, and reduced production costs.
2. Medical & Healthcare
Source: researchgate.com
Key Properties: Biocompatibility, corrosion resistance, ease of fabrication.
Typical Uses:
Medical Devices: Surgical instruments (scalpels, forceps), implants (orthopedic implants, dental crowns), diagnostic equipment components.
Why It’s Suitable: 316L stainless steel's biocompatibility and corrosion resistance make it ideal for medical applications. 3D printing provides the flexibility to create custom, patient-specific devices efficiently.
3. Oil, Gas & Industrial Manufacturing
Key Properties: Corrosion resistance, strength, wear resistance.
Typical Uses:
Oil & Gas: Drilling equipment (valves, pumps), pipeline components (fittings, connectors), tooling (wear-resistant tools).
Industrial Manufacturing: Machinery components (gears, bearings), tooling (molds, jigs), wear-resistant parts (conveyor belts, cutting tools).
Why It’s Suitable: Stainless steel's durability in harsh environments ensures reliability in oil, gas, and industrial manufacturing. 3D printing enables the production of custom parts on-demand, improving efficiency, reducing downtime, and cutting inventory costs.
4. Food, Beverage & Consumer Goods
Key Properties: Corrosion resistance, ease of cleaning, strength.
Typical Uses:
Food & Beverage: Processing equipment (mixers, conveyors), custom fixtures (nozzles, molds), tooling (maintenance parts).
Consumer Goods: Wearables (watch cases, jewelry), electronics housings (custom enclosures), custom tools (household gadgets).
Why It’s Suitable: Stainless steel's resistance to corrosion, ease of cleaning, and aesthetic appeal make it ideal for both food-grade applications and consumer goods. 3D printing allows for the rapid creation of custom components with high precision.
Common Stainless Steel Grades for 3D Printing
Several stainless steel grades are available for metal 3D printing, each offering a different balance of strength, corrosion resistance, and other properties. Among them, 316L and 17-4 PH are two of the most widely used grades, covering a broad range of functional applications.
316L Stainless Steel
316L is one of the most widely used stainless steel grades for metal 3D printing. The “L” stands for low carbon, which helps improve resistance to sensitization and corrosion after thermal exposure. Combined with its good corrosion resistance, ductility, and printability, 316L is a versatile choice for functional stainless steel parts.
Its corrosion resistance makes 316L particularly suitable for components exposed to moisture, chemicals, and marine environments. It is also commonly used in medical, food-processing, and industrial applications. For many general-purpose parts, 316L offers a good balance of corrosion resistance, mechanical performance, printability, and cost.
17-4 PH Stainless Steel
17-4 PH is a precipitation-hardening stainless steel that is typically chosen when higher strength and hardness are required. Compared with 316L, it offers higher mechanical strength after appropriate heat treatment, making it suitable for load-bearing components and other demanding applications.
A key advantage of 17-4 PH is its response to post-print heat treatment. Depending on the required properties, printed parts can be solution treated and aged to different conditions, such as H900. This allows engineers to adjust the material's strength and hardness for applications including aerospace, automotive, tooling, and industrial equipment.
316L vs. 17-4 PH vs. 304L vs. 15-5 PH
316L and 17-4 PH are widely used stainless steel grades for metal 3D printing, while 304L and 15-5 PH are also available for specific applications.
The radar chart below provides a quick overview of the key performance differences among these four stainless steel grades.
The table below provides a detailed comparison of their representative properties based on typical SLM production conditions.
Property | 316L | 17-4 PH | 304L | 15-5 PH |
|---|---|---|---|---|
Tensile Strength (MPa) | 550 – 650 | 1,150 – 1,350 | 520 – 620 | 1,100 – 1,300 |
Yield Strength (MPa) | 450 – 550 | 1,000 – 1,200 | 400 – 500 | 950 – 1,150 |
Elongation at Break (%) | 30 – 45 | 6 – 14 | 30 – 45 | 10 – 18 |
Hardness | 20 – 28 HRC | 36 – 44 HRC | 15 – 22 HRC | 35 – 42 HRC |
Density (g/cm³) | ~7.9 | ~7.8 | ~7.9 | ~7.8 |
Corrosion Resistance | Excellent | Good | Very Good | Good |
Typical Post-Processing | Stress relief / Annealing (Optional) | Solution treatment + Aging (e.g., H900) | Stress relief / Annealing (Optional) | Solution treatment + Aging |
Cost | $$ | $$$ | $ | $$$$ |
Typical Applications | Chemical processing, marine components, surgical instruments, food equipment | High-load brackets, aerospace fittings, turbine parts, tooling & molds | General machinery, architectural brackets, fluid housings | Aerospace structural parts, high-stress gears & shafts |
Note: The values above are representative ranges for SLM-produced parts. Actual properties may vary depending on printing parameters, build orientation, heat treatment, and post-processing.
Key Takeaways
316L: A good choice when corrosion resistance, ductility, and general-purpose performance are priorities. Its molybdenum content provides better resistance to pitting and crevice corrosion than 304L, particularly in chloride-containing environments.
17-4 PH: Better suited to applications requiring higher strength and hardness. Heat treatment, such as H900 aging, is an important part of achieving its desired mechanical properties.
304L: Offers good corrosion resistance and ductility and can be considered for general-purpose applications where the additional corrosion resistance of 316L is not required.
15-5 PH: A precipitation-hardening grade similar to 17-4 PH, but offering superior transverse toughness and ductility in thicker sections, making it suitable for critical aerospace and structural components.
Stainless Steel 3D Printing Technologies
The main technologies used in stainless steel 3D printing include Selective Laser Melting (SLM) / Direct Metal Laser Sintering (DMLS), Binder Jetting (BJ), Directed Energy Deposition (DED, including Laser DED and Wire Arc Additive Manufacturing / WAAM), and Material Extrusion (Metal FFF / Bound Metal Deposition).
Among them, SLM/DMLS and Binder Jetting are the most widely used due to their mature processes and broad applications.
SLM/DMLS
SLM/DMLS is a metal laser powder bed fusion (Metal LPBF) process that uses a high-power laser to selectively melt layers of metal powder under an inert gas atmosphere.
Pros: High-density parts, excellent mechanical properties, and the ability to produce complex geometries and internal channels.
Cons: Requires support structures and often stress-relief heat treatment; relatively slow and costly.
Best For: Functional prototypes, low-volume production, and high-performance aerospace, medical, and engineering parts.
Binder Jetting
Binder Jetting deposits a liquid binder onto metal powder to form a green part, which is then debound and sintered in a furnace to achieve its final density and strength.
Pros: Fast build speeds, high throughput, and no support structures.
Cons: Parts shrink during sintering and require dimensional compensation; density and strength may be lower than Metal LPBF.
Best For: Medium-to-high-volume production of small-to-medium parts, consumer products, and cost-sensitive components.
SLM vs. Binder Jetting vs. Metal FFF vs. WAAM
The table below compares SLM/DMLS, Binder Jetting, Metal FFF, and WAAM across seven key dimensions for stainless steel manufacturing.
Comparison Dimension | SLM / DMLS | Binder Jetting | Metal FFF | WAAM |
|---|---|---|---|---|
Complex Geometry Capability | ★★★★★ | ★★★★☆ | ★★★☆☆ | ★★☆☆☆ |
Final Part Density & Strength | ★★★★★ | ★★★★☆ | ★★★☆☆ | ★★★★★ |
Dimensional Accuracy | ★★★★★ | ★★★☆☆ | ★★☆☆☆ | ★☆☆☆☆ |
Surface Quality Before Finishing | ★★★☆☆ | ★★★★☆ | ★★☆☆☆ | ★☆☆☆☆ |
High-Volume Production Capability | ★★★☆☆ | ★★★★★ | ★★☆☆☆ | ★★☆☆☆ |
Large-Part Manufacturing Capability | ★★★☆☆ | ★★★☆☆ | ★★☆☆☆ | ★★★★★ |
Ease of Post-Processing | ★★★☆☆ | ★★☆☆☆ | ★★☆☆☆ | ★☆☆☆☆ |
Key Takeaways
SLM/DMLS is the best overall choice for complex, high-density stainless steel parts requiring high dimensional accuracy, fine features (like fluid channels), and reliable mechanical performance.
Binder Jetting is better suited to medium-to-high-volume stainless steel production, particularly when batch throughput and lower unit cost are more critical than extreme dimensional tolerances.
Metal FFF is a practical, office-friendly option for stainless steel functional prototypes, tooling, and low-volume replacement parts, though throughput, density, and detail resolution remain constrained.
WAAM is ideal for large, meter-scale stainless steel structures and near-net-shape components (e.g., marine or structural fittings), although coarse surface finishes and lower as-deposited accuracy necessitate substantial CNC machining.
Stainless Steel 3D Printing Cost
The cost of stainless steel 3D printing service depends on the selected stainless steel grade, printing process, part size and geometry, production quantity, and post-processing requirements.
How Much Does Stainless Steel 3D Printing Cost?
There is no fixed price for stainless steel 3D printing because each part has different manufacturing requirements. Small and simple parts generally cost less, while larger or more complex parts may require additional printing time, support structures, heat treatment, machining, or other post-processing.
For one-off and low-volume parts, SLM/DMLS is often the more practical option, although its unit cost may be higher because of machine time, supports, and post-processing. Binder Jetting can offer better unit economics for batch production, but debinding, sintering, and production setup must also be considered.
Upload your CAD file to get a project-specific stainless steel 3D printing quote.
How Is Stainless Steel 3D Printing Cost Calculated?
A basic estimate of the total cost can be expressed using the following formula:
Total Cost = Printing Cost (Material Unit Price × Part Weight) + Complexity Surcharge + Post-Processing + Packaging + Shipping + Customs Duty
The main cost components include:
Printing Cost: This is influenced by the selected stainless steel grade, such as 316L or 17-4 PH, as well as part weight.
Complexity Surcharge: May apply to designs with extensive supports, thin walls, internal channels, fragile features, or tall sections.
Post-Processing: Required support removal is normally included. Additional heat treatment, sintering, machining, or finishing may incur extra costs.
Packaging: Standard packaging may be included, while oversized, fragile, or high-precision parts may require specialized protection.
Shipping: Shipping costs depend on the package weight, dimensions, destination, and delivery method.
Customs Duty: Import duties, taxes, or customs fees may apply depending on the destination country, applicable HS code, and local regulations.
For a detailed explanation of metal 3D printing costs and why certain designs incur a complexity surcharge, see our guides to Metal 3D Printing Cost and Why Complex Designs Cost More in 3D Printing?.
DfAM Tips for Stainless Steel 3D Printing
Design for Additive Manufacturing (DfAM) helps adapt stainless steel parts to the requirements of different 3D printing processes. A well-optimized design can improve printability, reduce distortion and support structures, and simplify post-processing.
When designing a stainless steel part for 3D printing, consider the following factors:
Design Consideration | What to Consider |
|---|---|
Wall Thickness | Avoid excessively thin walls and sudden changes in thickness, which may increase the risk of distortion or residual stress. |
Overhangs & Supports | Minimize unsupported overhangs and optimize the build orientation to reduce support structures where practical. |
Internal Channels & Cavities | Provide suitable openings for powder removal, debinding, cleaning, and inspection when designing enclosed features. |
Part Size & Build Orientation | Ensure the part fits the printer or furnace, and select an orientation that balances support use, dimensional stability, and build efficiency. |
Tolerances & Machining Allowance | Identify critical dimensions and surfaces, and reserve sufficient material for machining where tighter tolerances are required. |
Shrinkage & Post-Processing | For Binder Jetting and Metal FFF, account for sintering shrinkage. Also consider heat treatment, machining, finishing, and inspection requirements. |
Feature Size & Part Consolidation | Use lattices, topology optimization, or part consolidation where they provide functional benefits, while keeping process limitations in mind. |
For complex stainless steel parts, Unionfab’s engineering team can review your design and recommend suitable materials, processes, and post-processing options before production.
Have a stainless steel design to review? Talk to Unionfab experts for free DFM feedback.
Comparison of Key Stainless Steel 3D Printing Service Providers
To help you choose the most suitable service provider based on your needs, we have listed a table to compare several key stainless steel 3D printing service providers as follows.
Service Provider | One-line Profile | Technology | Material | Max Build Size | Online Instant Quoting System | *Sample Cost | Lead Time (Day) | Trustpilot Score |
|---|---|---|---|---|---|---|---|---|
Xometry | A US-based global factory-less 3D printing supply chain platform | SLM/DMLS | SLM/DMLS: | SLM/DMLS: | ✅ | $575.26 | 10 | 4.6 |
Unionfab | A China-based global 3D printing service provider with six in-house 3D printing factories | SLM/DMLS | SLM/DMLS: | SLM/DMLS: | ✅ | $45.49 | 4–5 | |
Facfox | A China-based global factory-less 3D printing supply chain platform | SLM/DMLS | SLM/DMLS: | SLM/DMLS: | ✅ | $46.93 | 8 | 4.2 |
Materialise | A Belgium-based 3D printing company | SLM/DMLS | SLM/DMLS: | SLM/DMLS: | ✅ | $272.39 | 11 | / |
Additive3dasia | A Singapore-based 3D printing company | SLM/DMLS | SLM/DMLS: | Not Mentioned | ✅ | / | / | / |
RAM3D | A New Zealand-based 3D printing company | SLM/DMLS | SLM/DMLS: | Not Mentioned | ❌ | / | / | / |
*Note: The sample cost is calculated via the online instant quoting systems of each company above.
Volume: 74.62 cm³; Material: Stainless Steel 316L; Tech: Selective Laser Melting (SLM)
In summary:
Xometry and Unionfab offer both SLM/DMLS and Binder Jetting, while the other providers in the table mainly focus on SLM/DMLS.
Facfox offers the largest SLM build size at 500 × 500 × 1000 mm, followed by Unionfab at 400 × 300 × 400 mm.
Unionfab offers the shortest listed lead time at 4–5 days and the lowest sample cost at $45.49 among the providers with available pricing.
Real-World Stainless Steel 3D Printing Case Studies from Unionfab
Unionfab utilized Selective Laser Melting (SLM) technology to manufacture a highly accurate Stainless Steel 316L mold for N95 masks.
This mold enabled the fast and efficient large-scale production of protective masks, contributing to public health efforts during crucial times.
Key Details:
● Material: Stainless Steel 316L
● Size: 79 mm × 140 mm
● Machine Time: 15 hours
Why 3D Printing?
Traditionally, rotary die molds face several challenges—high manufacturing costs, long production cycles, and a significant amount of material waste. By using SLM 3D printing, we were able to address these issues effectively. Here’s how:
● Complex Geometry, Simplified: The mold's design features intricate details that would have been difficult or impossible to achieve with traditional methods. 3D printing enabled us to create a complex, lightweight structure without compromising on precision.
● Faster Production: Using 3D printing drastically reduced the time it would take to produce the mold, from weeks down to just three days. This not only accelerated the project but also allowed for quick iterations if needed.
● Durability and Performance: Stainless Steel 316L was the material of choice due to its corrosion resistance and high strength, ensuring the mold would endure heavy use and maintain its performance over time.
The Result
The final 3D printed N95 mask mold was both lightweight and precise, providing an excellent solution for the production of mask components. With SLM 3D printing, Unionfab was able to produce a high-quality, durable mold in a fraction of the time compared to traditional methods, meeting the customer's needs for both speed and performance.
Unionfab’s Stainless Steel 3D Printing Services
With over 20 years of manufacturing experience, 1,000+ industrial 3D printers, and six advanced manufacturing facilities, we offer scalable production capabilities supported by ISO 9001, 14001, 13485 and IATF 16949-certified quality management systems.
Below is an overview of our stainless steel 3D printing capabilities:
Feature | ||
|---|---|---|
Materials | ||
Max Part Size | 400 × 300 × 400 mm | 430 × 300 × 140 mm |
Layer Thickness | 0.035 mm | 0.05 mm |
Dimensional Tolerance | ±0.2 mm | ±0.3 mm |
Minimum Wall Thickness | 0.5 mm | 2.0 mm |
Pass Rate | 99.5% | 99.5% |
Lead Time | As fast as 4–5 days | As fast as 4–5 days |
On-Time Delivery Rate | 98% | 98% |
Certification | ISO 9001, 14001, 13485 & IATF 16949 | ISO 9001, 14001, 13485 & IATF 16949 |
Post Processing
We not only provide cost-effective stainless steel 3d printing but also a range of post-processing options below, including sandblasting, electroplating, and polishing etc., to improve surface quality, durability, and aesthetics of the prints, ensuring the perfect fit for your diverse needs.
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QA Report
In addition to delivering cost-effective prints, we also offer quality assurance services and can send the QA report with the shipment. Btw, if you haven’t used Unionfab’s 3d printing service yet, sign up now to get a 10% discount on your first order!
Customer Feedback
Here’s what customers are saying about Unionfab on Trustpilot:
Customer | Feedback |
|---|---|
Brem from US | ★★★★★ Surprised by the Low Price, but glad I took the risk. I was surprised and put off by the extremely low prices, and sometimes the offers of free parts, but I thought it was worth trying $20 at Unionfab, and I was not disappointed. I did their metal 3D printing service and I got my part super quick, I am looking to CNC some parts in the future and will use Unionfab for it most likely! Better customer service than most American companies, and cheaper too. |
Customer from JP | ★★★★★ This was my second time using it. As with the first time, I am very satisfied with the unit price and delivery date. Regarding the delivery date, it was very speedy and helpful. I would like to use it again in the future. |
Sean. S from US | ★★★★★ Trustworthy. The price of my 3D print was very competitive. Arrived about 10 days after submitting the 3D file (from China). The prints were high detail resin, and I'm very satisfied with the quality. Will definitely have them print more in the near future. Sent via UPS with tracking. |
Customer from JP | ★★★★ It was almost perfect. It was almost perfect and didn't have any issues on products. It was absolutely perfect if I can use OCS express to ship to Japan because their airfare cost is quite reasonable (cheap ship to Japan). |
Printed Online from FR | ★★★★★ Très professionnel Très professionnel, à l'écoute et réactif. Je recommande! |
UK_customer from GB | ★★★★★ Reliable. Multiple transactions - fast, reliable, great communication. |
FAQs
Can You 3D Print with Stainless Steel?
Yes. Stainless steel can be 3D printed using several metal additive manufacturing processes, including SLM/DMLS, Binder Jetting, Metal FFF, and WAAM. Common printable grades include 316L, 17-4 PH, 304L, and 15-5 PH.
Is 17-4 PH Stainless Steel Suitable for 3D Printing?
Yes. 17-4 PH is well suited for applications that require high strength and hardness. Post-print heat treatment can further enhance its mechanical properties, making it suitable for tooling, aerospace, automotive, and industrial components.
Can You 3D Print a Stainless Steel Exhaust Manifold?
Yes. SLM/DMLS can produce stainless steel exhaust manifolds with complex internal passages and customized geometries that are difficult to manufacture with conventional methods. It is particularly useful for prototyping, performance optimization, and low-volume production. Learn more in our guide to 3D Printed Exhaust Manifolds.
Can Stainless Steel Be 3D Printed with Filament?
Yes. Metal FFF uses filament containing metal powder and a polymer binder. After printing, parts require debinding and sintering, which can cause shrinkage. Proper design and dimensional compensation are therefore important.
