Duplex vs Super Duplex
Duplex vs Super Duplex: What AXALLOY Precision Can Deliver in Machining
At AXALLOY Precision we specialize in difficult-to-machine alloys, and duplex and super duplex stainless steels are among the most demanding materials we process. These alloys require careful process control because they harden rapidly, produce high tool wear, and can distort under heat.
We prepare your RFQ with full technical support: material selection guidance, fixture design, and a detailed process plan that matches your exact geometry, tolerances, and production volume. This preparation helps you achieve consistent quality and predictable lead times from the first quote.
What You Get When We Process Duplex vs Super Duplex Stainless Steels
Duplex Stainless Steels
We handle grades such as 2205 and deliver parts with:
- •Dimensional tolerances down to ±0.005 mm
- •Flatness down to 0.005 mm
- •Surface finish Ra 0.2 μm (ground) or Ra 0.8 μm (EDM)
- •Minimum wall thickness 0.5 mm
- •Consistent material traceability and full documentation (Material Test Report, Mill Test Certificate, First Article Inspection Report, ballooned drawings, etc.)
Super Duplex Stainless Steels
We also machine grades such as 2507. The additional chromium and molybdenum content increases corrosion resistance, but it also raises hardness and machining difficulty. Our process control and in-process inspection ensure:
- •Same tight tolerances and finishes as duplex
- •Full traceability and special-process records
- •Parts that meet your export or marine specifications without rework
In both cases you receive:
- •Material traceability throughout the lot
- •First Article Inspection Report and dimensional report
- •Custom quality documentation upon request
- •Parts ready for assembly or direct use
Duplex vs Super Duplex Stainless Steels – Machining Comparison
| Parameter | Duplex (e.g. 2205) | Super Duplex (e.g. 2507) |
|---|---|---|
| Typical Hardness | 300–350 HB | 350–400 HB |
| Tool Wear | Moderate (carbide tools) | Higher (special coatings recommended) |
| Recommended Process | 5-axis milling + EDM for complex pockets | 5-axis milling + EDM + slower feeds for slots and ribs |
| Minimum Wall Thickness | 0.5 mm | 0.5 mm (still achievable with proper fixturing) |
| Surface Finish Options | Ra 0.8 μm (EDM), Ra 0.2 μm (ground) | Ra 0.8 μm (EDM), Ra 0.2 μm (ground) |
| Typical Tolerance | ±0.005 mm dimensional | ±0.005 mm dimensional |
| Flatness | 0.005 mm | 0.005 mm |
| Concentricity | 0.008 mm | 0.008 mm |
| Repeatability | ±0.003 mm | ±0.003 mm |
| Supported Operations | Contouring, pocketing, drilling, EDM | Same + deeper slots and ribs |
| Typical Lead Time | 10–20 business days | 12–25 business days (depends on geometry) |
| Documentation | MTR, MTC, FAI, ballooned drawing, roughness report | Same + special-process records |
How Our Duplex vs Super Duplex Machining Helps Your Projects
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01
Complex geometry and thin walls
We evaluate your part early and recommend the right combination of 5-axis milling and EDM to maintain tolerances without distortion.
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02
Tight interfaces and demanding surfaces
Our positioning accuracy of ±0.005 mm and repeatability of ±0.003 mm keep critical features within spec.
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03
Export or marine requirements
Full material traceability, certificates, and inspection photos are included so you can ship directly.
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04
Predictable delivery
Once we receive your 3D model, 2D drawing, and material specification, we return a detailed quote and timeline (prototype in 5–10 business days, production 10–25 business days) so you can plan your schedule with certainty.
Typical Parts We Machine in Duplex and Super Duplex
Marine & Oil & Gas
Housings and brackets for marine and oil & gas equipment
Energy & Semiconductor
Valve bodies and pump components for energy and semiconductor industries
Robotics & Automation
Precision plates and structural parts for robotics and automation
Medical Devices
Medical device frames and implants (Grade 2/5/23 titanium is also available)
Ready to Get Your RFQ?
Upload your 3D model, 2D drawing, material grade, and specifications to start. We will evaluate manufacturability, provide a process plan, and give you a firm quote with exact lead times and documentation package.
AXALLOY Precision
Shenzhen – Precision Machining for Difficult Alloys
Supported file formats: STEP, STP, IGES, DWG, DXF, PDF, ZIP up to 500 MB
We look forward to reviewing your RFQ and helping you achieve the quality and delivery you need.