CNC Machining in Stainless Steel
Designed for machining, corrosion-resistant, and durable, high tensile strength, corrosion and temperature resistant.Stainless steel alloys for electronic hardware, automotive, aerospace, medical instruments, and many other applications.

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Stainless steel 304L (CNC) has excellent mechanical properties and good machinability.
Stainless steel 304/304L
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Stainless steel 316L (CNC) has similar mechanical properties to 304, with higher corrosion and chemical resistance.
Stainless steel 316/316L
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Stainless steel 303 (CNC) has excellent toughness, but lower corrosion resistance than 304.
Stainless steel 303
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Stainless steel 416 is magnetic and has a high machinability.
Stainless steel 416
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Stainless steel 420 provides high strength and corrosion resistance. It is the hardest of all stainless steels when hardened.
Stainless steel 420
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Stainless steel 440C has improved toughness and corrosion resistance due to Carbon and Chromium content.
Stainless steel 440C
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Stainless steel 301 is corrosion resistant similar to Stainless steel 304.
Stainless steel 301
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Stainless steel 17-7 (CNC) - SAE grade 630 - is a precipitation hardening alloy with good corrosion resistance. Can be hardened up to 44 HRC.
Stainless Steel 17-7
Available Stainless Steel Materials
CNC machining produces parts with excellent mechanical properties, accuracy and repeatability from metal and plastic. 3-axis & 5-axis CNC milling available.
Custom CNC Machining for Stainless Steel
Stainless steel is strong, resistant to corrosion, easy to clean and sterilize, and resistant to extreme temperatures. Our CNC machining services let you make custom stainless steel parts for many industries, including energy, medical technology, agriculture, industrial automation, machinery, robotics, and construction. We can machine your parts from a CAD file or technical drawing. This makes the steel harder and more corrosion-resistant.

Material Properties of Stainless Steel for CNC Machining
Jingbang has been engaged in CNC machining industry for 13 years, more than 50 kinds of metal and plastic materials have a wealth of machining experience, the following materials are commonly used in our production of stainless steel materials
Stainless Steel 303
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
---|---|---|---|---|---|---|---|
≤0.15 | ≤1.00 | ≤2.00 | ≤0.20 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤0.6 |
Mechanical Properties
Tensile strength (MPa) | Conditional yield strength (MPa) | Elongation (%) | Hardness |
---|---|---|---|
≥520 | ≥205 | ≥40 | HB≤187HB; HRC≤90HRB; HV≤200HV |
Stainless Steel 304
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % |
---|---|---|---|---|---|---|
≤0.08 | ≤0.03 | ≤2.00 | ≤0.45 | ≤0.03 | 18.0–20.0 | 8.0-11.0 |
Mechanical Properties
Tensile strength (MPa) | Conditional yield strength (MPa) | Elongation (%) | Hardness |
---|---|---|---|
≥515-1035 | ≥205 | ≥40 | ≤201HBW; ≤92HRB; ≤210HV |
Stainless Steel 316
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
---|---|---|---|---|---|---|---|
≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 |
Mechanical Properties
Tensile strength (MPa) | Conditional yield strength (MPa) | Elongation (%) | Reduction of area (%) |
---|---|---|---|
≥620 | ≥310 | ≥30 | ≥40 |
Stainless Steel 420
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
---|---|---|---|---|---|---|---|
0.16-0.25 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 12.00-14.00 | ≤0.75 | – |
Mechanical Properties
Tensile strength (MPa) | Conditional yield strength (MPa) | Elongation (%) | Hardness |
---|---|---|---|
≥635 | ≥440 | ≥20 | annealing, ≤223HB; quenching and tempering, ≥192HB |
Stainless Steel 430
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
---|---|---|---|---|---|---|---|
≤0.12 | ≤0.75 | ≤1.00 | ≤0.04 | ≤0.03 | 16.00-18.00 | ≤0.6 | – |
Mechanical Properties
Density | Melting point | Expansion coefficient | Young’s modulus |
---|---|---|---|
7.75g/cm³ | 1427℃ | mm/℃(at 20-100℃) | kN/mm² |
Stainless Steel 440C
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Mo % |
---|---|---|---|---|---|---|---|
0.95-1.20 | ≤1.00 | ≤1.00 | ≤0.035 | ≤0.03 | 16.00-18.00 | ≤0.6 | – |
Mechanical Properties
Tensile strength (MPa) | Internal stress (MPa) | Quenching and tempering | Hardness |
---|---|---|---|
≥560 | ≥250 | ≥58HRC | Annealed, ≤269HB |
Stainless Steel 17-4PH
Chemical Composition
C % | Si % | Mn % | P % | S % | Cr % | Ni % | Cu % |
---|---|---|---|---|---|---|---|
≤0.07 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 15.5-17.5 | 3.00-5.00 | 3.00-5.00 |
Mechanical Properties
Tensile strength (MPa) | Conditional yield strength (MPa) | Elongation (%) | Reduction of area (%) |
---|---|---|---|
aging at 480℃ | aging at 480°C | aging at 480°C | aging at 480°C |
If your project requires other materials, please Contact us, material-related data and suitability assessment for your project will be sent to you promptly.

Stainless Steel Machining Applications
CNC machining of stainless steel is used to produce a variety of parts in the medical industry, robotics, food and beverage industry, aerospace, and any industry that requires high-strength applications.
- Medical instruments
- Machine parts
- Gears
- Parts for tractors
- Heavy construction equipment
- Vacuum and pressure vessels
Ready to get a free quote?
Learn all about our full range of rapid prototyping and CNC machining services—contact Jingbang today. With a team of experienced engineers, we are ready to provide expert guidance and support at every step. Reach out for a free quote within 24 hours and enjoy a DFM analysis within 48 hours.
