CNC Stainless Steel Part
Your Professional CNC Stainless Steel Part Supplier
CNC stainless steel parts are precision components manufactured through CNC machining processes, offering excellent corrosion resistance, mechanical strength, and dimensional stability.
These parts are widely used in industrial equipment, automation systems, mechanical assemblies, and custom hardware applications, and are produced according to drawings or samples with specified tolerances.
Why choose us
Production Market
Our products are sold to customers in Europe, Southeast Asia, the Middle East, and the Americas. We expand our sales through channels such as Alibaba International, our own website, and global exhibitions, greatly enhancing our international presence.
OEM/ODM Services
Whether you need logo engraving, private-label packaging, special materials, or a completely customized design, our engineering and manufacturing teams can provide high-quality solutions tailored to your requirements.
Factory Scale
We have expanded our machine capacity and upgraded our tooling, fixtures, and inspection systems. As a result, production efficiency, product stability, and delivery speed have all reached new industry standards.
Specifications
|
Product Name |
Machined Stainless Steel Parts / CNC Machined Components |
|
Materials |
SS304, SS316, SS303, SS201, Custom Stainless Steel Grades |
|
Diameter Range |
Ø1 mm – Ø150 mm |
|
Processes |
CNC Milling, CNC Turning, Drilling, Grooving, Threading, Chamfering |
|
Surface Treatment |
Passivation, Polishing, Sandblasting, Tumbling, Nickel Plating |
|
Tolerance |
±0.01 – ±0.05 mm depending on structure |
|
Applications |
Machinery, fluid systems, connectors, valves, shafts, fittings, hardware |
|
Prototype Quantity |
1–50 pcs |
|
Mass Production |
CNC machining centers, automatic turning, batch processing |
|
Lead Time |
7–20 working days depending on complexity |
|
OEM/ODM |
Supported |
Guideline of cnc machining stainless steel :
Material Inspection : Stainless steel composition is analyzed using a spectrometer. For 304 series stainless steel, ensure Cr ≥ 16% and Ni ≥ 8%, and generate a material report.
Process Planning : Process is broken down according to the 3D model (STEP/IGS), prioritizing high-speed machining (HSC), with a cutting speed of 100-300 m/min.
Tool Selection : Carbide TiAlN coated tools, feed rate 0.1-0.3 mm/r, depth of cut 0.5-2 mm. PCD tools are used for difficult-to-machine materials such as 316L.
Key Control Points : After rough machining, low-temperature aging at 200℃ for 2 hours to relieve internal stress and prevent deformation.
Cutting Parameters : Milling of 304 stainless steel, VC = 150 m/min, f = 0.15 mm/z, ap = 1.5 mm, oil mist lubrication and cooling.
First Article Inspection : The first article of each batch is inspected dimensionally using a CMM, and a PPAP document is generated.
Inspection frequency : 3 pieces are randomly selected from every 50 pieces produced in batches, and critical dimensions are monitored online using a laser diameter gauge.
Record requirements : Complete machining parameter records (cutting speed, feed rate, tool life) must be maintained for at least 3 years.
Common Steel Grades Used in CNC Machining
|
Steel Grade |
Composition & Type |
Key Properties |
Machinability / Weldability |
Typical Applications |
TiRapid Notes & Example |
|
1018 (Low Carbon Steel) |
Fe, ~0.18% C, Mn |
High ductility, easily carburized, good toughness |
Good machinability, excellent weldability |
Fixtures, shafts, bushings, carburized parts |
Used for locating fixtures and shafts requiring H7 tolerance (±0.01 mm). |
|
1215 (Free-Machining Steel) |
Fe, C, Mn, high S |
Generates small chips, supports high cutting speed, lower strength |
Excellent machinability, poor weldability |
Fittings, pins, screws, automatic lathe parts |
Ideal for mass-production screws; saves 25% cycle time. |
|
1045 (Medium Carbon Steel) |
Fe, ~0.45% C, Mn, Si |
Tough, affordable, moderately hardenable |
Moderate machinability, fair weldability |
Shafts, gears, bolts, pins |
Machined hydraulic rods, surface ground to Ra ≤ 0.4 µm. |
|
4130 (Cr-Mo Alloy Steel) |
Fe, Cr, Mo, Mn |
High strength-to-weight ratio, heat-treatable |
Average machinability, good weldability |
Welded frames, aircraft parts |
Used in welded control arms; bores kept ≤ 0.01 mm coaxiality. |
|
4140 (Cr-Mo Alloy Steel) |
Fe, Cr, Mo, Mn |
Excellent fatigue and wear resistance; pre-hard machinable |
Good machinability, moderate weldability |
Couplings, spindles, gears |
Pre-hardened 4140 hubs ±0.01 mm; induction-hardened teeth. |
|
304 Stainless Steel |
18 Cr – 8 Ni (Austenitic) |
Excellent corrosion resistance, high formability |
Fair machinability, excellent weldability |
Food equipment, housings, clamps |
Enclosures with 0.03 mm flatness over 100 mm. |
|
316 / 316L Stainless Steel |
17 Cr – 12 Ni – 2.5 Mo |
Superior corrosion resistance in marine or chemical environments |
Fair machinability, excellent weldability |
Marine valves, chemical equipment |
316L valve blocks, Ra ≤ 0.8 µm after grind, leak-free. |
|
17-4PH Stainless Steel |
Fe, Cr, Ni, Cu |
High strength and corrosion resistance, age-hardenable |
Moderate machinability, good weldability |
Aerospace parts, pump shafts |
Machined then H900-aged pins, positional tol ≤ 0.02 mm. |
|
Tool Steels (D2, H13, O1, A2) |
High C + Cr / Mo |
Extreme wear and heat resistance, stable at high temp |
Difficult machinability, poor weldability |
Dies, molds, cutting tools |
H13 mold cavities EDM-finished Ra ≤ 0.4 µm, corner radius ≤ 0.2 mm. |
Tolerance Ranges (Typical CNC Steel Machining)
|
Feature |
Standard Tolerance |
High-Precision Capability |
|
Linear dimensions |
±0.05 mm |
±0.01 mm |
|
Hole diameters |
H7–H9 |
H6 achievable |
|
Flatness |
0.05 mm / 100 mm |
≤0.015 mm |
|
Angularity |
±0.5° |
±0.2° |
|
Thread pitch accuracy |
±0.02 mm |
±0.01 mm |
Maximum dimensions : 1500mm×800mm×600mm
Minimum machining dimensions : 5mm×5mm×0.5mm
Maximum machining length : 3000mm
Diameter range : φ3mm-φ500mm
Positioning accuracy : X/Y/Z axis positioning accuracy up to ±0.005mm, repeatability ±0.003mm
Linear dimensional tolerance : Up to IT5 grade (±0.013mm/300mm)
Angle tolerance : ±5″
Surface quality : Mirror finish Ra≤0.2μm, precision grinding Ra≤0.4μm, conventional milling Ra≤1.6μm
Geometric tolerances : Flatness ≤0.01mm/1000mm, Cylindricity ≤0.005mm, Perpendicularity ≤0.008mm/300mm
Certificate
fAQ
We're well-known as one of the leading cnc stainless steel part manufacturers and suppliers in China. With reliable product quality and honest service, we have won widespread trust and praise from our customers. Please rest assured to wholesale custom made cnc stainless steel part from our factory.
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