Increase in Wear Resistance and Corrosion Protection.
Metal Machining
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Stainless Steel CNC Machining Services
Stainless Steel CNC Machining Services
Top Aluminum CNC Machining Parts Manufacturer and Supplier in China
Our Aluminum CNC Machining Service lets you get high-grade custom aluminum parts fabricated to suit your requirements. Using sophisticated CNC technology, we have mastered the creation of components unparalleled in precision, repeatability, and efficiency. Our service guarantees exceptional outcomes, remarkable prototyping, and full-scale production speed alongside unmatched customization.
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Precision Aluminum machining services: Your One-Stop Online Solution
Material grade selection: 304, 316, 303, 17-4PH and more. Hardness up to 420 HB and tensile strength to 1600 MPa.
Most Accuracy: Standard tolerances of ±0.005 inches (±0.127 mm) down to ±0.001 inches (±0.025 mm).
CNC Advanced Machining: 3-Axis, 4-Axis, and 5-Axis CNC machines with the latest software.
Size and Weight Restrictions: Sections with maximum dimensions of 24 x 24 x 8 inches and 50 kg (110 lbs) in weight.
Precision Surface Treatment: Ra values starting from 0.4 µm and sandblasting, polishing, custom coatings.
Why Choose Stainless Steel for CNC Machining
Stainless steel works best for durable components and precision parts for CNC machining and custom manufacturing projects.
Corrosion Resistance
Ideal for wet, chemical, or temperature extremes, stainless steel has great longevity.
Smooth Surface Finish
Provides elegance and refinement for broader applications.
High Strength
Able to withstand mechanical stress which makes it perfect for demanding applications.
Versatility
Extensively used in various industries such as aerospace, automotive, medical, etc.
How Does Stainless Steel Compare to Other Metals?
How Does the CNC Machining Process Work for Stainless Steel Parts?
Superior Durability: Compared to aluminum, stainless steel posses greater impact resistance and tensile strength, and does not undergo corrosion like untreated carbon steel.
Exceptional Corrosion Resistance: Unlike aluminum and carbon steel, stainless steel does not corrode without the need for protective coatings, making it suitable in protective stainless steel environments.
Long Term Cost Efficiency: Although more expensive than alternatives such as carbon steel and aluminum, stainless steel requires less maintenance, lowering long-term investments due to durability.
CAD Drafting: Engineers outline particular details with the aid of computer-aided design (CAD) tools.
CNC Programming: The CAD outputs are translated into CNC programs that control the machine activities.
Choice of Material: The most suitable type of stainless steel is selected according to the specifications of the project.
Machining: The material is shaped using either CNC mills or CNC lathes.
Final Touches: Further processes are done to obtain exact measurements and a good quality surface finish.
Aluminum Alloys Available for CNC machining
Stainless Steel 15-5
Stainless Steel 15-5 is a martensitic, precipitation-hardening stainless steel with chromium, nickel, and copper. It offers high strength, hardness, and corrosion resistance, enhanced by heat treatment. It's ideal for applications needing superior corrosion resistance, ductility and toughness.
Stainless Steel 17-4
Stainless Steel 17-4 is a widely used, precipitation-hardening martensitic stainless steel known for its high strength, toughness, and corrosion resistance. It is ideal for applications needing high strength and hardness with reasonable corrosion resistance.
Stainless Steel 18-8
18-8 stainless steel (18% chromium, 8% nickel) offers excellent corrosion resistance and durability. It's easily formed, requires minimal upkeep, and looks appealing. Common applications leverage these properties.
Stainless Steel 304
Diverse industries depend on stainless steel 304 due to its strength and exceptional corrosion resistance. As an austenitic stainless steel, it is used in storage tanks, cutlery, tubing, and kitchen equipment, as well as in architectural panels.
Stainless Steel 316
Stainless Steel 316 is composed of chromium, nickel and molybdenum and is preferred for its corrosion resistance. Its primary uses encompass food processing, medical devices, chemicals, cookware, and marine industry. Additionally, its variant 316L is better suited for high-temperature, corrosive environments
Stainless Steel 416
Stainless Steel 416 is an economical choice of serrated martensitic stainless steel because of his sulfur and phosphorus content that increases its machinability. Its corrosion resistance is only moderate, but it is ideal for heavily machined parts which require good strength.
Stainless Steel 440C
Stainless Steel 440C: This high-carbon martensitic steel has excellent hardness, strength, wear resistance, and moderate corrosion resistance. It is ideal for ball bearings, knife blades, and valve components.
Stainless Steel 410
Stainless Steel 410 is a martensitic steel with 11.5-13.5% chromium. It offers good corrosion resistance, strength, and hardness and is ideal for cutlery, turbine blades, and fasteners.
AISI 12L14 Steel
AISI 12L14: Resulfurized, rephosphorized carbon steel with lead, offering exceptional machinability; perfect for high-speed machining in fittings, couplings, and bushings.
Comparison of stainless steel Materials
| Material | Composition | Mechanical Properties | Corrosion Resistance | Machinability | Weldability | Common Applications |
|---|---|---|---|---|---|---|
| Stainless Steel 15-5 | 15–17.5% Cr, 3.5–5.5% Ni, 0.15% max C + other trace elements | Tensile Strength: ~1035–1170 MPa
|
Good general and chloride resistance | Moderate, improves in annealed state | Good; post-weld heat treatment recommended | Aerospace, marine components, medical devices, structural parts |
| Stainless Steel 17-4 | ~17% Cr, ~4% Ni, 3–5% Cu, 0.07% max C | Tensile Strength (H900): ~1400 MPa
|
Comparable to 304; effective against atmospheric and mild chemical exposure | Good in solution treated form, tougher after aging | Readily welded in solution-treated form | Aerospace components, nuclear waste casks, oil field equipment, high-strength fasteners |
| Stainless Steel 18-8 (304) | ~18% Cr, ~8% Ni, ~0.08% max C + trace Mn, Si, P, S | Tensile Strength (annealed): 515–750 MPa
|
Excellent; ideal for general corrosion and oxidizing environments | Fair; work hardens quickly | Excellent; low risk of carbide precipitation with 304L variant | Cookware, food processing equipment, dairy tanks, chemical tanks, fasteners |
| Stainless Steel 303 | ~18–20% Cr, ~8–10.5% Ni, ~0.07% max C + trace Mn, Si, P, S | Tensile Strength (annealed): ~690 MPa
|
Fair; sulfur addition reduces resistance slightly compared to 304 | Excellent; best austenitic grade for machining | Limited due to sulfur; suitable for non-critical welded applications | Gears, shafts, nuts, bolts, heavily machined components |
| Stainless Steel 304 | ~18–20% Cr, ~8–10.5% Ni, ~0.07% max C + trace Mn, Si, P, S | Tensile Strength (annealed): ~515 MPa
|
Excellent in various environments; vulnerable to pitting in chloride | Fair; softer, prone to work hardening | Excellent | Kitchen sinks, brewing equipment, architectural structures, nuts, bolts |
| Stainless Steel 316 | ~16–18% Cr, ~10–14% Ni, 2–3% Mo, trace Mn, Si, P, S | Tensile Strength (annealed): ~579 MPa
|
Superior to 304, especially in chloride and marine environments | Fair | Excellent; minimal risk of sensitization when using the 316L grade | Marine hardware, chemical processing, food and pharmaceutical equipment |
| Stainless Steel 416 | ~12–14% Cr, ~0.08–0.15% C, ~0.15–0.35% S | Tensile Strength (annealed): ~690 MPa
|
Moderate; mostly atmospheric and mild environments | Very High; behaves like a free-machining carbon steel | Limited due to sulfur inclusion | Screws, gears, valve components, precision machined parts |
| Stainless Steel 420 | ~12–14% Cr, ~0.15–0.42% C | Tensile Strength (hardened): ~700–1020 MPa
|
Fair in hardened-polished condition; moderate in mild corrosive environments | Poor in hardened state | Poor; preheating and post-weld tempering needed | Cutlery, surgical instruments, wear-resistant parts |
| Stainless Steel 440C | ~16–18% Cr, ~0.95–1.2% C, trace Mn, Si | Tensile Strength (hardened): ~755 MPa
|
Limited, better with polishing; prone to pitting without maintenance | Poor | Poor; brittle structure post-heat treatment | High-wear components (knife blades, bearings, molds, dies) |
| Stainless Steel 410 | ~11.5–13.5% Cr, ~0.08–0.15% C | Tensile Strength (annealed): ~480–700 MPa
|
Moderate; good for atmospheric, water, and steam; prone to oxidation with chloride | Good when annealed | Poor; requires pre and post-heat processing | Petroleum processing, cutlery, turbine blades, hand and machine tools |
| AISI 12L14 Steel | ~0.15% C, 0.85–1.15% Mn, 0.26–0.35% S, 0.15–0.35% P | Tensile Strength (annealed): ~410 MPa
|
Limited; highly prone to rust and corrosion | Excellent; designed for speed machining | Difficult to weld due to sulfur and phosphorus | Gears, precision machined components, fasteners |
| C45 Steel | ~0.45% C, ~0.6–0.9% Mn | Tensile Strength (quenched/tempered): ~600 MPa | Poor; highly vulnerable to oxidation and corrosion | Moderate to Good depending on heat treatment | Poor; readily weldable only with pre/post heating | Machinery shafts, bolts, general engineering parts |
| Q235 Steel | ~0.14–0.26% C, ~0.3–0.65% Mn, ~0.3% Si | Tensile Strength (annealed): ~375–500 MPa | Poor; prone to oxidation | Moderate; good for simple machining | Excellent | Structural steel for bridges, buildings, common construction elements |
| Q345 Steel | ~0.2% C, ~1.0–1.6% Mn, ~0.55% Si | Tensile Strength (annealed): ~470–630 MPa
|
Poor; requires protection for corrosive exposure | Moderate; slightly tougher than Q235 | Excellent; widely applicable | Construction, bridges, towers, pressure vessels, welded pipelines |
Stainless Steel CNC Machining Services Detailed Technical Specifications
| Category | Details |
|---|---|
| Material Properties | - Grades: 303, 304/304L, 316/316L, 17-4 PH, 440C
|
| Machining Techniques | - CNC Milling: 3-5 axis, ±0.005 mm tolerance, complex geometries
|
| Surface Finishing | - Options: Media blasting, electropolishing, passivation, heat treatment
|
| Applications | - Aerospace: Engine blades, structural components
|
| Cost Factors | - Influences: Material grade, design complexity, machining time, finishing requirements
|
| Optimization Tips | - Design Considerations: Avoid unnecessary features, use corner radii
|
Common Applications for stainless steel machined parts
Versatile Applications
Stainless steel CNC machining supports critical uses in aerospace, medical, automotive, energy, and marine industries, ensuring durability and precision.
Sample Components
Components include engine brackets, surgical tools, transmission housings, turbine components, and ship-wear components resistant to rust.
Challenging Environments
Designed to endure tough conditions while meeting exact specifications.
Industries Served
Aerospace & Defense, Medical & Pharmaceutical, Oil & Gas, Power Generation, Automotive, and Electronics.
Precision, Quality, and Reliability for Custom Machined Stainless Steel Parts
Utilize our stainless steel CNC machining services to obtain dependable and durable components. Aim to exceed the expectations of sectors such as aeronautics, automobiles, health, and many others.
Stainless Steel 15-5 parts
Stainless Steel 15-5 is a high strength and hardness stainless grade with good corrosion resistance primarily used in aerospace, oil, gas, and nuclear industry, with very good properties in large sections and ability to be heat treated.
Chromium: 14.0-15.50% composition range
Nickel: 3.50-5.50% for added strength
Copper: 2.50-4.50% improving performance
Density: 0.2836 lbs/cubic inch
Yield Strength (H900): 170,000 psi
Elongation (H1150): 14% in 2 inches
Stainless Steel 17-4 parts
Stainless Steel 17-4 parts offer exceptional strength, corrosion resistance, and durability, excelling in aerospace, medical, and petrochemical industries under harsh, corrosive, and high-temperature conditions.
Yield Strength: 1,100–1,300 MPa range
Tensile Strength: 1,300–1,400 MPa range
Hardness: Up to 45 HRC scale
Thermal Conductivity: 17.9 W/mK at H900
Density: 7.75 g/cm² average value
Melting Temperature: 1404–1440 °C range
Stainless Steel 18-8 parts
Stainless Steel 18-8 parts deliver corrosion resistance, durability, and versatility, excelling in food processing, construction, and automotive industries, with a non-reactive surface for hygienic and demanding environments.
Composition: 18% chromium, 8% nickel
Tensile Strength: 515 MPa minimum
Yield Strength: 205 MPa standard minimum
Density: Approximately 7.9 g/cm³
Melting Point: 1400–1450 °C range
Thermal Conductivity: 16.2 W/mK at 100 °C
Stainless Steel 303 parts
Stainless Steel 303 parts offer excellent machinability, moderate corrosion resistance, and durability, excelling in aerospace, automotive, and precision manufacturing for high-performance, finely machined applications.
Composition: 17-19% chromium, 8-10% nickel
Tensile Strength: 620 MPa minimum
Yield Strength: 310 MPa standard minimum
Density: Approximately 8.03 g/cm³
Melting Point: 1400–1450 °C range
Thermal Conductivity: 16.3 W/mK value
Stainless Steel 304 parts
Stainless Steel 304 parts provide outstanding corrosion resistance, durability, and versatility, excelling in food processing, construction, and automotive industries for reliable performance in diverse manufacturing conditions.
Composition: 18% chromium, 8% nickel
Tensile Strength: 515 MPa minimum
Yield Strength: 310 MPa standard minimum
Density: Approximately 8.03 g/cm³
Melting Point: 1400–1450 °C range
Thermal Conductivity: 16.3 W/mK value
Stainless Steel 316 parts
Stainless Steel 316 parts deliver superior corrosion and heat resistance, excelling in marine, industrial, and chemical applications with exceptional durability and reliability in harsh environments.
Density: 8.0 g/cm³
Tensile Strength: 515-700 MPa
Yield Strength: Minimum 205 MPa
Melting Point: Approximately 1400°C
Corrosion Resistance: Exceptional in chloride environments
Thermal Conductivity: 16.3 W/m·K
Stainless Steel 416 Parts
Stainless Steel 416 offers excellent machinability, moderate corrosion resistance, and durability, ideal for precision applications in automotive, aerospace, and manufacturing, commonly used in shafts, gears, and bolts.
Machinability: Up to 85% efficient
Hardness Range: 262-321 HB
Corrosion Resistance: Moderate, improved when hardened
Chromium Content: 12-14%
Maximum Operating Temp: 760 °C intermittent •
Density: 7800 kg/m³
Stainless Steel 420 Parts
Stainless steel of 420 grade possesses properties of increased solidity and polishability with sufficient corrosion resistance, which makes it a top choice for wear resistant materials in applications like surgical plus industrial tools and cooking ware and equipment with mechanical strength able to be enhanced.
Hardness Range: Up to 50 HRC
Tensile Strength: 655-1620 MPa
Chromium Content: 12-14%
Density: 7700 kg/m³
Recommended Temp Range: ≤650 °C
Corrosion Resistance: Moderate, hardened state optimal
Stainless Steel 440C Parts
Stainless Steel 440C packs serious hardness, stands up to rough use, shrugs off rust better than plain carbon steel, and thus suits sharp-edged tools such as surgical scalpels, precision ball bearings, and top-tier folding knives.
Hardness Range: Up to 60 HRC
Tensile Strength: 760-1970 MPa
Chromium Content: 16-18%
Density: 7650 kg/m³
Wear Resistance: Outstanding in hardened form
Corrosion Resistance: Moderate, surface finish dependent
Stainless Steel 410 Parts
Stainless Steel 410 has good heat treatment capability, high strength, and good corrosion resistance in moderate conditions which makes this martensitic stainless steel very suitable for applications all the parts which are wearable like fasteners, turbine blades, kitchen utensils.
Chromium Content: 11.5-13.5%
Tensile Strength: Up to 1,405 MPa
Hardness Range: Annealed to 43 HRC
Density: 7,700 kg/m³
Corrosion Resistance: Good in tempered state
Maximum Temperature: Up to 650 °C
AISI 12L14 Steel Parts
AISI 12L14 steel offers superior machinability and smooth finish, ideal for precision parts like bushings and fittings in automotive, electronics, and industrial manufacturing, excelling in high-speed, cost-effective production.
Yield Strength: 260-460 MPa range
Tensile Strength: 440-620 MPa range
Hardness Range: 140-170 Brinell HB
Machinability Index: 160-170% efficiency
Lead Content: 0.15-0.35% added
Density: 7.87 g/cm³ precision
C45 Steel Parts
C45 steel also boasts immense strength, offers superb machinability apart from other excellent characteristics, making it best for the manufacture of durable parts such as gears, shafts and bolts of automobiles and machines as well as for increse of hardness through heat treatment.
Density: 7.8 g/cm³ standard
Yield Strength: 320 MPa minimum
Tensile Strength: 590-740 MPa range
Carbon Content: Moderate, approximately 0.4-0.5%
Hardness Range: 165-220 Brinell HB
Thermal Conductivity: 40-45 W/mK
Surface Treatments for Machined Stainless Steel Parts
We provide a range of surface treatments, including corrosion protection, more than just performance finishes, and coating decoration, as well as brand and design synchronicity.
Anodizing
Polished Surfaces
Improvement of the Exterior Beauty and Lowering of Resistance Therefore Reducing Contact Damage During Usage.
Coatings for stainless steel
State-of-the-Art Coatings Such as Pvd and Teflon for Specialized Parts with Enhanced Performance.
Passivation for stainless steel
Passivation Is the Method Used to Clean and Remove Impurities from the Surface of Stainless Steel to Encourage Corrosion Protection.
Bead Blasting for stainless steel
Uniform matte finishes for improved visual appeal.
why choose our Custom CNC Machining Stainless Steel Services
Our engineers work closely with you, taking each sketch and turning it into a part that fits, functions, and lasts.
We run modern 3- and 5-axis CNC mills that handle tight angles and deliver a surface finish you'll love.
Tell us what your part faces, and we'll help you pick the right stainless-steel grade for strength, corrosion, and cost.
Our shop meets ISO 9001 and other key standards, so every batch gets the same careful oversight and proof of quality.
Start with ten pieces or jump to thousands; our team adjusts the schedule and tooling to supply exactly what you need.
Stay in the loop with real-time updates; our friendly staff is just a call or message away until the job is done.
Stainless Steel Machined Parts Available for Custom Manufacturing
Stainless steel stair parts
Wisconsin metal parts
Stainless steel parts basket
Stainless steel auto parts
Stainless steel air seeder parts
Cast stainless steel parts
Stainless steel guitar parts
Stainless steel glock parts
Stainless steel rosary parts
Stainless steel pump parts
Stainless steel marine parts
Stainless steel welding parts
304 stainless steel exhaust parts
Cast stainless steel parts
Stainless steel header parts
Stainless steel jewelry parts
Stainless steel balustrade parts
Stainless steel boat parts
Stainless steel bimini parts
Stainless steel brake parts
Stainless steel bracelet parts
Stainless steel chimney parts
Stainless steel jeep parts
Stainless steel lamp parts
Stainless steel stair parts
Deburring stainless steel parts
Ducane stainless steel grill parts
Stainless steel pool filter parts
Stainless steel exhaust parts
Stainless steel grill parts
Stainless steel railing parts
Stainless steel glock parts
What Our Client Says
Build your project with confidence knowing that customers across industries trust we
"Outstanding precision and quality! The baetro team turned around our parts on a tight deadline, yet they matched every spec without compromise. Thanks to them, weve saved countless hours on the shop floor."
John
Project Manager, Aerospace Industry
"Reliable and professional! The finish and durability of the components went well past what we expected, and there was zero rework. Weve finally found a partner we can trust for all our CNC machining."
Mike
Operations manager, medical-equipment manufacturer
Expert Guides to custom CNC machining stainless steel
Can 304 stainless steel be machined
304 stainless steel is certainly machinable, though its tendency to work-harden means that sharp tools and disciplined feeds are essential.
How much does CNC machining cost per hour?
Hourly CNC machining rates usually lie between 30 ???????????? 200, a band affected by the specific controller type, part geometry, tool wear expense, and raw-material price.
How can I tell if my stainless steel is 304 or 316?
Distinguishing grade 304 from 316 stainless can proceed either through a simple magnet test-304 exhibits a faint pull whereas 316 remains non-magnetic-or by chemical examination for the molybdenum that 316 incorporates but 304 lacks.
What are the weakness of 304 stainless steel?
Chloride-laden waters attack 304 stainless steel with surprising speed, leaving pits where the surface once gleamed. The alloy also struggles under fumes from strong acids and surrenders easily to scratches. Heat and sheer stress reveal yet another weakness: 304 simply doesnt hold strength once the temperature climbs far above room level.
Can you weld 304 SS to 316 SS?
Welding 304 and 316 stainless steels is absolutely doable. Most pros grab ER308L or ER316L rod, and TIG is the go-to method since it gives better puddle control.
What is the price of 304 stainless steel per kg?
The price of 304 stainless steel in June 2025 is approximately $5.96 per kilogram in Europe
What does 308 mean in stainless steel?
308 stainless steel sits comfortably in the classic 300 series family. With 19 to 21 percent chromium and about 10 percent nickel, it laughs off rust and keeps shiny in most everyday settings.
How much does it cost to CNC stainless steel?
The average expense of CNC processing stainless steel is going to cost between $60 and $80 each hour. Meanwhile, the price of the stainless steel material is the one to perfomancing the pricing estimation from around $1.87 – $3.14 per pound in the estimation.
Frequently Ask Questions
Q: What are the common machining applications for stainless steel?
A: Shops routinely lean on stainless for one-off CNC brackets, test prototypes, and larger production runs needed in auto or aerospace. Because the alloy refuses to rust and laughs at heavy loads, it shows up wherever toughness and cleanliness can’t be traded away.
Q: What types of CNC machining materials are typically used for stainless steel?
A: 304 food-grade steel, seawater-resistant 316, and the heat-treated 17-4 PH sound familiar to anyone running a milling spindle. Each lets machinists chase its blend of edge life, smoothness, and corrosion defense. Metal-supply catalogs read like a slice chart of those families.
Q: How does a CNC lathe work for machining stainless steel?
A: On a CNC lathe, the part spins while a carbide blade creeps in, peeling curls of steel away and leaving a round echo of the program. That moving-center trick locks diameter and finish tight enough for medical shafts and aerospace pins on the first pass. Settings change fast, but the method stays old-school perfect.
Q: What perks does stainless steel bring to CNC work?
A: Stainless-steel stock sits squarely at the crossroads of toughness and polish. Thanks to its high tensile strength, even heavy-cut jobs fly smoothly across its face. Housekeeping is a breeze, and the final piece can shrug off years of wear and tear.
Q: Will the metal stay rust-free once the part has been seen in the mill?
A: Absolutely. A thin film of chromium stitches itself to the surface when oxygen shows up, and that shield repels water, acids, and salt like an invisible raincoat. Harsh shops or seaside installations rarely bother with extra plating.
Q: What drives the price of CNC machining when stainless steel is on the shop floor?
A: Pricing usually hinges on design intricacy, the exact stainless-steel grade chosen, batch size, and the specific operations, which could be turning, milling, or something else. A quick online calculator will only scratch the surface, so engineers wind up in the office asking for a firm quote once those variables settle.
Q: How do I avoid the patchy, burned look sometimes seen on machined stainless parts?
A: Good carbide inserts, matched feed rates, and a steady coolant flow do most of the lifting, but a brief polish or light anodize at the end gives the surface that smooth, reflective finish. Messy chips left on the part after the last cut can ruin the entire look, so cleanup habit matters too
Q: Why do I hear chatter about tight tolerances whenever stainless steel is mentioned?
A: Because in aerospace or medical gear, a half-millimeter off might mean the piece won’t fit or will fail mid-use. That degree of accuracy also reduces rework, shrinks assembly time, and ultimately keeps the whole project on deadline.
Q: Can I have CNC parts cut from a few different grades of stainless steel?
A: For sure. Many machining shops work with multiple stainless grades in a single project. Remember that each grade behaves a little differently, so you should lay out your performance and environmental needs before the order is finalized.
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