Stainless Steel CNC Machining

Custom stainless steel CNC machining services for prototypes, OEM components, and production parts. Dakings Rapid delivers high-precision stainless steel parts with excellent strength, corrosion resistance, and dimensional accuracy through advanced CNC milling, CNC turning, and finishing solutions.

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Premium Stainless Steel Materials for Every Application

We machine a wide range of stainless steel grades to support custom manufacturing requirements across aerospace, medical, automotive, robotics, industrial equipment, and other demanding applications.

AUSTENITIC

304 Stainless Steel

The most widely used stainless steel grade for CNC machining and fabrication. Offers excellent corrosion resistance, weldability, and formability for custom parts and general-purpose components.

Tensile Strength 73,200 psi
Hardness 201 HB
Machinability 45%
Corrosion Resistance Excellent
FOOD PROCESSING CHEMICAL ARCHITECTURE
MARINE GRADE

316/316L Stainless Steel

Provides superior corrosion resistance in marine, chemical, and harsh operating environments. Ideal for precision stainless steel parts requiring long-term durability and reliability.

Tensile Strength 79,800 psi
Hardness 217 HB
Machinability 36%
Corrosion Resistance Superior
MEDICAL MARINE HARDWARE PHARMACEUTICAL
FREE-MACHINING

303 Stainless Steel

Optimized for stainless steel CNC machining with improved machinability. Commonly used for high-volume machined parts, fittings, fasteners, and precision components.

Tensile Strength 90,000 psi
Hardness 228 HB
Machinability 78%
Corrosion Resistance Good
FITTINGS SHAFTS GEARS
PRECIPITATION HARDENING

17-4 PH Stainless Steel

A high-strength precipitation-hardening stainless steel offering excellent mechanical performance and corrosion resistance. Suitable for aerospace, medical, and OEM industrial components.

Tensile Strength 190,000 psi
Hardness 388 HB
Machinability 50%
Corrosion Resistance Good
AEROSPACE TURBINE BLADES NUCLEAR
MARTENSITIC

410 Stainless Steel

Heat-treatable stainless steel with excellent wear resistance and strength. Frequently used for custom parts requiring durability and moderate corrosion protection.

Tensile Strength 180,000 psi
Hardness 415 HB
Machinability 54%
Corrosion Resistance Moderate
VALVES PUMP PARTS FASTENERS
DUPLEX

Duplex 2205 Stainless Steel

Combines exceptional strength with outstanding corrosion resistance. Commonly selected for oil & gas, chemical processing, and demanding industrial applications.

Tensile Strength 116,000 psi
Hardness 293 HB
Machinability 30%
Corrosion Resistance Exceptional
OIL & GAS DESALINATION HEAT EXCHANGERS

Need Help Specifying Tolerances?

Our engineering team can review your CAD files and recommend the most cost-effective tolerance strategy for your stainless steel CNC machining project. Get expert feedback before production and receive a fast online quote with DFM support.

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Stainless Steel CNC Parts Across Industries

Custom stainless steel machining solutions designed to meet the performance, quality, and compliance requirements of diverse industries.

Aerospace

Aerospace & Defense

High-precision stainless steel CNC machining for structural components, housings, and aeronautical parts. We support demanding applications that require consistent quality and reliable performance.

Materials Used:
17-4 PH, 15-5, 304L, Custom 455
Medical

Medical Devices

Custom stainless steel components for surgical instruments, diagnostic equipment, and medical systems. Full material traceability and inspection documentation are available.

Materials Used:
316L, 304, 17-4 PH, Nitronic 60
Food

Food & Beverage

Precision stainless steel parts manufactured for sanitary processing equipment. Electropolishing and specialized finishing options help improve cleanliness, corrosion resistance, and product longevity.

Materials Used:
304, 316 (Food Grade)
Oil

Oil & Gas

Corrosion-resistant machined parts and custom components engineered for harsh operating environments. Suitable for valves, fittings, pumps, and drilling equipment.

Materials Used:
316, Duplex 2205, Super Duplex
Automotive

Automotive

OEM stainless steel components manufactured to support demanding automotive applications. High-precision machining ensures consistent quality across prototype and production volumes.

Materials Used:
304, 409, 430, 17-4 PH
Robotics

Robotics & Automation

Precision stainless steel parts for robotic systems, automation equipment, actuators, and motion-control assemblies. Tight tolerances support reliable performance in advanced manufacturing environments.

Materials Used:
303, 304, 17-4 PH, 440C

Precision Stainless Steel Machining Capabilities

Advanced manufacturing technologies enable us to produce custom stainless steel parts with tight tolerances, complex geometries, and consistent quality from prototype to production.

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5-Axis CNC Milling

Our 5-axis CNC milling services produce complex stainless steel components with fewer setups and greater accuracy. Ideal for high-precision parts requiring intricate features, undercuts, and superior surface quality.

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CNC Turning & Swiss Screw Machining

High-precision CNC turning solutions for shafts, fittings, connectors, and cylindrical components. Swiss machining technology delivers exceptional concentricity and repeatability for small, complex stainless steel parts.

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Wire EDM & Sinker EDM

EDM machining enables intricate geometries and extremely tight tolerances in hardened stainless steel materials. Commonly used for tooling, aerospace components, and precision manufacturing applications.

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Surface Finishing

Comprehensive finishing services for production-ready stainless steel parts, including passivation, electropolishing, bead blasting, polishing, and deburring. Surface treatments improve appearance, corrosion resistance, and functional performance.

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CMM Inspection

Advanced CMM inspection systems verify dimensional accuracy throughout production. First Article Inspection (FAI), PPAP documentation, and detailed quality reports are available for OEM and regulated industry requirements.

Tolerance Capabilities

FEATURE TYPE STANDARD PRECISION
Linear Dimensions±0.005"±0.0005"
Hole Diameters±0.002"±0.0002"
Surface Finish (Ra)63 μin8 μin
Flatness0.002"/in0.0005"/in
Concentricity0.002" TIR0.0005" TIR
Thread Class2A/2B3A/3B
Surface Finish Reference Chart

Surface Finish Reference Chart

Reference surface finish values for stainless steel CNC machining applications and custom manufactured parts.
Visual RA (MM) RA (MIN) N Grade Finish Type Typical Process
Mirror Polish Visual 0.1 4 N3 Mirror Polish
Lapping Superfinishing
Fine Polish Visual 0.2 8 N4 Fine Polish
Fine Grinding Polishing
Smooth Visual 0.4 16 N5 Smooth
Precision Grinding Honing
Fine Visual 0.8 32 N6 Fine
Fine Milling Grinding
Medium Visual 1.6 63 N7 Medium (Standard)
Standard CNC Milling Turning
As-Machined Visual 3.2 125 N8 As-Machined
Standard Milling Rough Turning
Rough Visual 6.3 250 N9 Rough
Heavy Milling Sawing
Very Rough Visual 12.5 500 N10 Very Rough
Rough Machining Sand Casting

Conversion Formulas (Industry Standard)

RMS ≈ Ra × 1.11
Rz ≈ Ra × 4 (typical)
Ra (μin) = Ra (μm) × 39.37
Ra (μm) = Ra (μin) × 0.0254

Custom Stainless steel parts

Our stainless steel CNC machining services support custom prototypes, low-volume production, and mass manufacturing projects. We produce precision stainless steel parts for OEM manufacturers across robotics, industrial automation, medical devices, machinery, energy, automotive, and construction industries.

With advanced CNC milling, CNC turning, and finishing capabilities, we deliver machining solutions tailored to your design requirements, material specifications, and performance goals. Simply upload your CAD files to receive engineering support and a fast online quote.

Stainless steel CNC machining services

Dakings Rapid provides comprehensive stainless steel CNC machining services for customers requiring high-strength, corrosion-resistant, and dimensionally accurate components. From prototype development to full-scale production, we manufacture custom stainless steel parts that meet demanding industry standards.

Our capabilities include CNC milling, CNC turning, precision drilling, threading, surface finishing, and secondary fabrication operations. We support a wide range of stainless steel grades and can produce everything from simple machined parts to highly complex geometries with tight tolerances.

As a China-based CNC machining supplier, we help global manufacturers reduce lead times while maintaining consistent quality, competitive pricing, and reliable delivery. Whether you need prototype quantities or ongoing OEM production, our engineering team provides practical manufacturing solutions for every stage of your project.

Stainless Steel CNC Machining FAQs

The cost of stainless steel CNC machining depends on several factors, including material grade, part complexity, machining time, tolerance requirements, surface finishing, and production volume. Grades such as 304, 316, and 17-4 PH may have different material and processing costs.

Upload your CAD files to receive a fast online quote. Our engineering team reviews each project and recommends the most cost-effective manufacturing solution based on your design requirements.
Stainless steel CNC machining is a precision manufacturing process that removes material from a solid stainless steel workpiece using computer-controlled CNC milling and CNC turning equipment. It is commonly used to produce custom stainless steel parts with complex geometries, tight tolerances, and excellent repeatability.

This process is widely used for OEM components, industrial equipment, medical devices, robotics, automotive systems, and aeronautical parts.
We support a wide range of stainless steel grades, including 304, 316/316L, 303, 17-4 PH, 410, Duplex 2205, 420, 430, 440C, 15-5 PH, and other specialty alloys.

Our engineers can help you select the best stainless steel grade based on strength, corrosion resistance, machinability, operating environment, and budget requirements.
The best stainless steel grade depends on the application.
  • 303 Stainless Steel offers excellent machinability and is ideal for high-volume machined parts.
  • 304 Stainless Steel provides a balance of corrosion resistance, strength, and cost.
  • 316 Stainless Steel is preferred for marine, chemical, and medical environments.
  • 17-4 PH Stainless Steel is often selected for high-strength aerospace and industrial components.
Our team can recommend the most suitable material based on your project requirements.
Yes. In addition to stainless steel CNC machining services, we provide stainless steel fabrication solutions for prototypes and production projects.

Available secondary manufacturing processes include laser cutting, welding, bending, roll forming, assembly, and other custom fabrication operations. These services help customers consolidate multiple manufacturing requirements with a single supplier.
Yes. Depending on the material grade, thickness, and design requirements, stainless steel parts can be manufactured using bending, stamping, and forming processes.

These fabrication methods are commonly used for brackets, enclosures, panels, frames, and custom sheet metal components. Our engineering team can evaluate your design and recommend the most efficient manufacturing approach.
We offer a variety of finishing services to improve appearance, corrosion resistance, cleanliness, and functional performance.
    Available finishing options include:
  • Grinding
  • Polishing
  • Passivation
  • Electropolishing
  • Bead Blasting
  • Brushing
  • Deburring
The optimal finish depends on the application, industry requirements, and desired surface appearance.
Yes. Many projects require multiple manufacturing technologies to optimize cost, lead time, and performance.

In addition to stainless steel CNC machining, Dakings Rapid offers sheet metal processing services such as laser cutting, welding, bending, and roll forming, as well as industrial 3D printing for rapid prototyping and low-volume production. Combining these capabilities allows us to provide complete manufacturing solutions from prototype to production.
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