Stainless Steel CNC Machining Service

Overview

Why Choose Us for Stainless Steel Parts?

Stainless steel is the workhorse of corrosion-resistant materials — medical instruments, food-grade equipment, marine fittings, and aerospace components. We specialize in 304 (general purpose), 316L (marine/medical, low carbon for welding), 17-4 PH (precipitation hardened high strength), and 303 (free-machining).

Stainless machining requires rigid machines, sharp carbide, and proper coolant flow. Our process includes passivation (ASTM A967) for corrosion resistance and optional electropolishing for a mirror-bright surface. Tolerance ±0.005 mm, MOQ 1 piece.

Capabilities & Tolerances

Tolerances, Materials, Surface Finish

Specification	Metric	Imperial
Min Tolerance	±0.005 mm	±0.0002"
Standard Tolerance	±0.05 mm	±0.002"
Min Wall Thickness	0.5 mm	0.020"
Surface Roughness	Ra 0.4–1.6 μm	Ra 16–63 μin
Lead Time	5–10 business days	5–10 business days
MOQ	1 piece	1 piece

Materials & Surface Finish

Compatible Materials and Surface Treatments

Materials

Stainless Steel 304 (General Purpose)
Stainless Steel 316L (Marine / Medical / Low-Carbon for Welding)
Stainless Steel 17-4 PH (High Strength, Aerospace)
Stainless Steel 303 (Free-Machining)
Stainless Steel 410 / 420 (Cutlery / Surgical)
Stainless Steel 2205 (Duplex, High-Strength, Chloride Resistant)

Surface Finish

Passivation (ASTM A967)
Electropolishing (Mirror-Bright)
Mirror Polishing
Brushed Finish
Bead Blasting
Black Oxide
Pickling
Nickel / Chrome Plating

Industries

Medical & Surgical Instruments
Food & Beverage Equipment
Marine & Offshore
Aerospace
Pharmaceutical
Oil & Gas
Laboratory Equipment

Related Case Studies

Real Parts Made With Stainless Steel CNC Machining Service

Medical 316L Stainless Steel Surgical Handle

Material: Stainless Steel 316L
Tolerance: ±0.005mm
Process: stainless-steel-cnc-machining
Industry: Medical Devices
Batch Type: Prototype

FAQ

Stainless Steel CNC Machining Service — Frequently Asked Questions

304 is general purpose, 316L has added molybdenum for chloride / marine / medical corrosion resistance and lower carbon for weldability, 17-4 PH is precipitation-hardened to ~40 HRC for high-strength aerospace and surgical applications.

Yes — passivation per ASTM A967 is included on every stainless order. Electropolishing optional for a mirror-bright, ultra-smooth surface.

Yes — we can machine 17-4 PH at H900 (44 HRC) and H1025 (40 HRC). For complex geometry we recommend solution-annealed machining + post-machining precipitation hardening.

Yes — mill test reports (MTR) with chemistry, mechanical properties, and heat lot traceability are included with every shipment.

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