Difficult-Alloy Precision CNC Machining
Duplex Stainless Steel Milling
AXALLOY Precision is a Shenzhen-based CNC machining partner specializing in precision components made from difficult-to-machine alloys. Our Duplex Stainless Steel Milling service delivers high-performance machined parts with outstanding corrosion resistance, mechanical strength, and dimensional stability — ideal for demanding environments in the marine, oil & gas, energy, and chemical sectors.
We support international engineering, procurement, and quality teams from prototype development through low-volume and repeat production.
Core Duplex Stainless Steel Milling Capabilities
Complete machining solutions engineered for the unique challenges of Duplex and Super Duplex stainless steels.
Multi-Axis CNC Milling
3-axis, 4-axis, and 5-axis machining optimized for complex contours, pockets, thin walls, and precision interfaces on Duplex Stainless Steels.
Mill-Turn Machining
Combined turning and milling to create stronger feature relationships with fewer setups and improved concentricity.
Precision Grinding
Surface, cylindrical, and centerless grinding to achieve Ra 0.2 μm finish and tolerances down to ±0.002 mm.
Special Processes
EDM, deburring, passivation, heat treatment, coating, assembly support, and full traceability throughout production.
Inspection & Documentation
CMM inspection with up to 1.8 + L/300 μm accuracy, first article inspection, dimensional reports, material test certificates, and custom quality records tailored to your requirements.
Material Focus – Duplex Stainless Steels
AXALLOY Precision specializes in machining the two most widely specified duplex grades with controlled parameters that preserve corrosion resistance, minimize heat-affected zones, and maintain mechanical properties.
Duplex 2205
The standard duplex grade offering excellent strength and corrosion resistance for a wide range of industrial applications.
Super Duplex 2507 (S32750 / UNS S32750)
Higher strength and superior resistance to pitting and crevice corrosion for the most demanding offshore and chemical environments.
General Machining Capabilities
Production parameters for Duplex Stainless Steel components across all volume requirements.
| Parameter | Standard Capability |
|---|---|
| Supported Production Volume | 1–10,000+ parts |
| Prototype Quantity | 1–20 parts |
| Low-Volume Production | 20–500 parts |
| Batch Production | 500–10,000+ parts |
| Standard Dimensional Tolerance | ±0.010 mm |
| Precision Dimensional Tolerance | ±0.005 mm |
| Standard Angular Tolerance | ±0.5° |
| Precision Angular Tolerance | ±0.1° |
| Position Tolerance | Down to 0.010 mm |
| Flatness | Down to 0.005 mm |
| Concentricity | Down to 0.008 mm |
| Standard Surface Finish | Ra 1.6 μm |
| Precision Machined Finish | Ra 0.8 μm |
| Ground Surface Finish | Down to Ra 0.2 μm |
| Minimum Wall Thickness | 0.5 mm |
| Minimum Machined Hole Diameter | Ø0.5 mm |
| Minimum Thread Size | M1.0 |
| Maximum Part Weight | 1,000 kg |
| Standard Lead Time | 10–20 business days |
| Prototype Lead Time | 5–10 business days |
Specialized Duplex Stainless Steel Milling Capabilities
Advanced processes for the most demanding component geometries and surface requirements.
5-Axis CNC Milling
- Max Part Size:Ø500 × 400 mm
- Max Table Load:800 kg
- Positioning Accuracy:±0.005 mm
- Repeatability:±0.003 mm
Operations: Facing, contouring, pocketing, drilling, tapping, boring, thread milling
Suitable Parts: Marine valve bodies, oil & gas manifolds, offshore brackets, chemical processing components
Precision Grinding
- Grinding Tolerance:Down to ±0.002 mm
- Surface Finish:Down to Ra 0.2 μm
Suitable Parts: Shafts, sealing surfaces, bearing fits, precision plates, hardened or corrosion-critical components
Wire EDM & Sinker EDM
- Wire EDM: Max workpiece 600 × 400 × 300 mm, tolerance ±0.005 mm, Ra 0.8 μm
- Sinker EDM: Max workpiece 500 × 350 × 300 mm, Ra 0.4 μm, min internal radius R0.05 mm
Ideal for narrow slots, sharp internal corners, and blind features in Duplex Stainless Steels.
Best-Fit Projects for Duplex Stainless Steel Milling
Understanding the ideal project profile ensures successful outcomes and dependable delivery.
Technical Profile
Complex geometry, thin walls (<0.5 mm), critical interfaces, tight geometric tolerances, and demanding surface finishes on Duplex Stainless Steel.
Commercial Profile
High-value prototypes, low-volume or high-mix production, repeat programs, or projects being transferred from unreliable suppliers.
Quality Profile
Parts requiring material certification (Material Test Report, Mill Test Certificate), first article inspection, dimensional reports, special-process records, or export-ready packaging.
Strong Project Inputs
Complete 2D drawings and 3D models (STEP, IGES, etc.), defined material grade (Duplex 2205 or 2507), identified critical features, expected quantities, required documentation, and realistic target date.
Industries & Markets We Serve
- Marine & Offshore
- Oil & Gas / Energy
- Chemical & Petrochemical
- Aerospace & Defense (complementary applications)
- Automation & Robotics
- Semiconductor Equipment (corrosion-critical subsystems)
Geographic Markets
We serve engineering, procurement, and quality teams across:
North America, Europe, United Kingdom, Australia, New Zealand, and advanced manufacturing markets across Asia.
AXALLOY Commitment
We evaluate material behavior, geometry, tolerances, surface requirements, inspection strategy, and production volume before defining the machining process. Our approach emphasizes manufacturability, process control, documentation, and dependable communication — never the lowest unit price.
Discuss Your Duplex Stainless Steel Milling Requirements
We are an ideal partner for OEMs, Tier 1 & Tier 2 suppliers, engineering firms, and contract manufacturers seeking stable, traceable production routes for Duplex Stainless Steel components.
- Prototype through repeat production support
- Full material certification and traceability
- Export-ready packaging for international delivery