Precision CNC Stainless Steel Parts by Istar Machining

Get strong, precisely made parts for your important projects. At Istar Machining, we create custom CNC stainless steel parts with stable quality and reliable performance. Our parts offer excellent durability and strong corrosion resistance, so they keep working in tough environments.

We treat every job as serious work. For us, your parts are not simple items. They are key components in your system. Our customers already understand materials and tolerances. They choose us because they want a CNC stainless steel machining partner that can handle complex drawings, control risk, and keep quality the same from piece to piece. From RFQ to final inspection, our goal is clear: accurate, consistent CNC stainless steel parts that are ready to use and easy to trust.

You get more than just parts. You get a long-term CNC stainless steel machining partner who focuses on details. Our skilled engineering team uses proven methods, clear process control, and modern equipment to turn your ideas into real parts you can rely on.

Get a New Quote

Supports uploading of the following file formats: .STEP .STP .SLDPRT .STL .IPT .3MF .3DXML .PRT .SAT .DXF .X_T .X_B .JT .CATPART

20+ Years

Istar Machining's years in the industry

300,000 square feet

The size of Istar Machining's factory

856 CNC machines

Our CNC equipment count

2000+ skilled workers

Istar's number of skilled machinists/operators

Our CNC Machining Processes

We use modern machines, CAM systems, and clear methods to support CNC stainless steel machining from prototype to production.

CNC Milling

We use advanced milling centers to cut your parts from solid metal blocks. 5-axis machining lets us make complex shapes in one setup.

Learn More

CNC Turning

Our turning services are ideal for shafts, rings, bushings, and other round parts with accurate diameters and smooth surfaces.

Learn More

Swiss Machining

For very small, detailed parts, especially for medical and precision devices, we use Swiss-type machines for stable, close-tolerance results.

Learn More

Other Services

We also provide CNC drilling for accurate holes and CNC grinding for very smooth and precise surfaces.

Learn More

Keep CNC Stainless Steel Machining Jobs Stable

Cutting speed and feed rate for each material and feature.
Coolant and lubrication to reduce heat and protect both tools and parts.
Chip control to keep the cutting area safe and clean.
Workholding methods that clamp parts firmly without distortion.
Use of quality carbide tools and planned tool life for consistent results.

Advanced Cutting Stainless Steel Strategies

High-Speed Machining (HSM) for thin walls, pockets, and complex 3D surfaces, using smooth toolpaths and controlled engagement.
High-Feed Milling (HFM) for fast roughing of blocks and forgings with high metal removal and lower heat.
Hybrid strategies, combining HFM for bulk removal with HSM and finishing passes for tight dimensions and clean surfaces.

These methods help us deliver stainless steel parts that match your drawings and also help reduce cost and lead time.

The Right Stainless Steel for Your Project

The choice of material is important for both performance and cost. As your CNC stainless steel machining partner, we can help you select suitable grades while keeping your design intent. We follow standards from AISI, ASTM International, SAE International, and NIST. We can supply material certification for each order when needed. We machine many stainless steel alloys, including:

Austenitic Stainless Steel

304 Stainless Steel (AISI 304) for food equipment and general parts.
303 Stainless Steel (AISI 303) for parts that need better machinability.
316/316L Stainless Steel (AISI 316) for marine, medical, and high-corrosion applications.

Martensitic & Ferritic Stainless Steel

416 Stainless Steel (AISI 416) for gears, valves, and parts needing easy machining.
Ferritic grades for certain automotive and structural parts.

Specialty Stainless Steel

17-4 PH stainless steel (17-4 PH) for high-strength aerospace and precision components.
Duplex stainless steel, such as Duplex 2205, for parts in the oil, gas, and marine sectors.
Nitronic 60 (UNS S21800) for anti-galling, wear-resistant parts.

We also work with other high-performance metals such as Inconel, Monel, and Hastelloy when projects require them.

We specialize in stainless steels that many shops find difficult. Instead of guessing, we create alloy-specific process windows based on real cutting behavior and part function. This approach:

Reduces trial-and-error on your CNC stainless steel machining jobs.
Shortens setup time and project launch time.
Keeps long-term production more stable and predictable.

Duplex 2205 vs 17-4 PH

For designs that must balance strength, corrosion resistance, and total cost, we support both Duplex 2205 and 17-4 PH with clear machining plans:

17-4 PH
- More predictable chip formation.
- Higher practical cutting speeds than many duplex grades.
- Stable size control when machining and heat treatment follow the right order.
Duplex 2205
- Needs lower speeds and carefully controlled feeds to avoid heavy work hardening.
- Uses sharp, coated carbide tools to reduce wear and edge damage.
- Requires strong fixturing and focused coolant to manage higher cutting forces.

With data from our own production and tool life checks, we can tell you what to expect for each grade: runtime, tolerance risk, and cost impact. This helps your team choose materials with a clear view of CNC stainless steel machining behavior.

Nitronic 60 (UNS S21800)

For sliding parts, threaded parts, and anti-galling surfaces, Nitronic 60 is a smart choice. We support it with:

Rigid setups to avoid vibration.
Toolpaths that do not dwell or rub.
Positive-rake carbide tools and tuned edge prep.
Coolant plans that keep the cut stable.
Thread milling and profile control for smooth assembly.

The result is consistent CNC stainless steel machining of Nitronic 60 parts that resist seizure and stay stable across repeat orders.

316L for Corrosion-Critical Parts

For 316L parts in marine, medical, food, or vacuum systems, we pay attention not only to dimensions but also to the condition of the surface:

Roughing strategies that keep heat under control.
Finishing passes to create even sealing faces and precise gasket and O-ring areas.
Matched machining, cleaning, and passivation steps so the final part supports your corrosion and cleanliness targets.

Design-for-Manufacturing Support

We also help improve part designs before full release, especially for CNC stainless steel machining:

Suggesting where surface roughness can be relaxed without losing function.
Adjusting fillet sizes, wall thicknesses, and access angles for better tool stability.
Recommending alternative tempers or grades when they make machining easier but still meet performance needs.

This kind of support lowers launch risk and helps keep your total project cost under control.

Alloy Capability Snapshot

Alloy / Family	Typical Applications	Istar Machining Focus
17-4 PH	Aerospace, motion, high-strength components	Heat treatment-aware machining, stable tool life
Duplex 2205	Marine, chemical, structural fittings	Tool life, coolant, and fixture control
316L	Medical, marine, food, vacuum components	Surface integrity and cleanliness
Nitronic 60	Anti-galling fasteners, bushings, valves	Smooth fits and wear resistance
Other PH & stainless grades	Precision mechanisms, housings, instrumentation	Fast, stable ramp-up with data-based parameters

Perfect Finishes for Your Parts

The final surface of your part is important for both performance and appearance. For CNC stainless steel machining projects, we offer:

Polishing for smooth, bright, and visually clean surfaces.
Passivation to improve corrosion resistance, especially for demanding uses.
Electropolishing for extra-smooth, easy-to-clean surfaces in medical, food, and clean environments.

We match these finishes with clear process control:

Passivation can follow ASTM A967 or AMS 2700 when specified.
We select the right method based on the grade and working conditions.
We clean parts carefully before treatment.
We use agreed inspection steps and keep batch records.

This helps reduce staining, improves corrosion life, and gives you traceable results for your stainless steel components.

Common Parts We Make

With our CNC stainless steel machining capabilities, we produce a wide range of parts, including:

stainless steel Shafts — stainless steel Housings

We keep key properties in mind, such as strength, toughness, weldability, and magnetic behavior, so the final parts match both your drawing and your real-world use.

We are also comfortable with demanding GD&T and 5-axis shapes. For these parts we:

Use datums based on real functional surfaces.
Measure with coordinate measuring machines for precise features.
Use scanning and non-contact checks where complex shapes require more data.
Control measurement conditions to keep results reliable.
Provide clear reports, so your team can review results quickly.

Why Teams Choose Istar for CNC Stainless Steel Machining

By putting engineering, machining, finishing, and inspection together in one focused team, Istar Machining helps you cut risk, save time, and keep a strong and stable CNC stainless steel machining supply chain.

Real experience in CNC stainless steel machining of Duplex 2205, 17-4 PH, 316L, Nitronic 60, and more.

Smart use of HSM, HFM, and multi-axis machining to balance speed, accuracy, and tool life.

Reliable passivation and surface control for demanding environments.

Strong measuring and inspection ability for tight GD&T and complex 5-axis parts.

Data-supported production for both prototypes and long-term supply.

Fast, clear communication with a team used to global standards and expectations.

Let’s Build Your Next Great Part

Your search for a dependable CNC stainless steel machining partner can end here. At Istar Machining, we are ready to support your next project with clear communication, stable quality, and real technical understanding.

Send us your CAD files and Request for Quote (RFQ). Let us show you how we turn your stainless steel designs into reliable, ready-to-use parts.

Contact Istar Machining today to start your project.