Stainless Steel CNC Machining Service
Superior-quality stainless steel machining with precision, strength, and versatility for various industries. Cutting-edge facilities and experienced team delivering custom stainless steel parts that perform reliably in the most demanding environments.
Stainless Steel
Chromium-enhanced corrosion resistance, heat-resistant, maintains strength in extreme conditions.
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Price:$0
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Lead Time:< 10 days
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Wall Thickness:0.75 mm
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Tolerances:±0.005″ (±0.125mm)
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Max Part Size:200 cm x 80 cm x 100 cm
Stainless Steel 201
Properties: Low-nickel Cr-Mn-Ni alloy (Cr 16-18%, Mn 5.5-7.5%, Ni 3.5-5.5%), moderate corrosion resistance, magnetic, work-hardening grade.
Applications: Kitchenware, sinks, decorative trims, railway carriages.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 515-760 | 240 | 40-55 | 200-250 | 7.93 |
Stainless Steel 301
Properties: High-strength Cr-Ni alloy (Cr 16-18%, Ni 6-8%), excellent ductility when annealed, work-hardens rapidly.
Applications: Automotive structural parts, aircraft components, springs.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 515-930 | 260 | 40-60 | 200-250 | 7.93 |
Stainless Steel 303
Properties: Free-machining Cr-Ni-S alloy (Cr 17-19%, Ni 8-10%, S ≥0.15%), lower corrosion resistance than 304 due to sulfur.
Applications: Shafts, nuts, bolts, fittings requiring extensive machining.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 500-750 | 220 | 35-50 | 180-220 | 7.93 |
Stainless Steel 304
Properties: Standard 18/8 Cr-Ni alloy (Cr 18-20%, Ni 8-10.5%), excellent corrosion resistance, non-magnetic when annealed.
Applications: Food processing equipment, chemical containers, architectural cladding.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 515-720 | 240 | 40-60 | 160-200 | 7.93 |
Stainless Steel 304L
Properties: Low-carbon variant of 304 (C ≤0.03%), reduced carbide precipitation, better weldability.
Applications: Welded structures, pharmaceutical tanks, heat exchangers.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 485-680 | 230 | 45-60 | 150-190 | 7.93 |
Stainless Steel 316
Properties: Mo-added Cr-Ni alloy (Cr 16-18%, Ni 10-14%, Mo 2-3%), superior pitting resistance.
Applications: Marine hardware, medical implants, coastal architecture.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 515-690 | 260 | 40-50 | 170-220 | 7.98 |
Stainless Steel 316L
Properties: Low-carbon 316 (C ≤0.03%), enhanced weldability and corrosion resistance.
Applications: Chemical processing pipelines, nuclear reprocessing units.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 485-620 | 250 | 45-55 | 160-200 | 7.98 |
Stainless Steel 430
Properties: Ferritic Cr alloy (Cr 16-18%), magnetic, moderate corrosion resistance, poor weldability.
Applications: Appliances, automotive trim, low-cost cutlery.
| Tensile Strength, Yield (MPa) | Fatigue Strength (MPa) | Elongation at Break (%) | VHardness (Brinell) | Density (g/cm³) |
|---|---|---|---|---|
| 450-600 | 180 | 20-25 | 150-180 | 7.70 |
Surface Finishing Options for Brass
Brass CNC turned parts can undergo various surface finishing processes to enhance their appearance, durability, and performance.
- As Machined
- Electroplating
- Passivation
- Powder Coating
Surface Finishes We Offer
Since magnesium parts are prone to machining defects and formation of burrs, it’s important to treat them with the right surface finishes.
This will improve their aesthetic appeal and enhance performance and longevity. At RapidDirect, we offer an extensive range of surface finishing options tailored to your requirements,
ensuring optimal protection and visual quality for your magnesium parts.
This will improve their aesthetic appeal and enhance performance and longevity. At RapidDirect, we offer an extensive range of surface finishing options tailored to your requirements,
ensuring optimal protection and visual quality for your magnesium parts.
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As MachinedDescription: Standard finish with surface roughness of 3.2 μm (126 μin), removes sharp edges and deburrs parts cleanly. Key Use: Functional parts requiring no post-processing (e.g., brackets, gears). Process Tolerance: Dimensional ±0.1 mm, Ra 3.2±0.5 μm Process Specifications: ISO 2768-m standard, burr height ≤0.05 mm
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ElectroplatingDescription: Electrochemical metal coating (e.g., chrome, zinc) for durability. Process Compatibility: Post-machining electrodeposition Key Use: Automotive trim, jewelry. Process Tolerance: Coating thickness 5-25 μm±2 μm, adhesion ≥4B (ASTM B571) Process Specifications: Current density 1-10 A/dm², bath temp. 40-60℃
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PassivationDescription: Acid treatment to remove free iron and enhance corrosion resistance. Process Compatibility: Post-cleaning chemical immersion Key Use: Surgical tools, food processing equipment. Process Tolerance: Film thickness 0.001-0.01 μm, salt spray ≥96 hrs Process Specifications: Nitric acid 20-50%, process time 20-60 min
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Powder CoatingDescription: Electrostatic polymer powder cured into durable film. Process Compatibility: Post-cleaning spray and bake Key Use: Outdoor furniture, automotive wheels. Process Tolerance: Coating thickness 60-120 μm±10 μm, ΔE≤1.0 Process Specifications: Voltage 30-90 kV, cure 180-200℃×15 min
Pros
- Corrosion Resistance: Exceptional resistance to rust and corrosion, ideal for harsh environments. This makes it suitable for a wide range of outdoor and indoor applications, including those involving extreme temperatures and pressures.
- High Strength: Robust mechanical properties compared to mild steel, brass, and various aluminum alloys to ensure durability under stress.
- Versatile Applications: Suitable for industries ranging from aerospace to medical devices.
- Recyclability: Eco-friendly, as stainless steel can be recycled without degradation.
- Aesthetic Appeal: Thanks to its high chromium content, stainless steel maintains a silver-white appearance that neither discolors nor rusts over time.
- Cryogenic Resistance: Certain grades of stainless steel remain stable across a wide range of temperatures. Austenitic steels retain excellent toughness and enhanced tensile strength even at sub-zero temperatures.
Cons
- Cost: Higher initial cost compared to some other metals, but offers long-term value.
- Machining Challenges: Some grades can be difficult to machine, requiring specialized tools and techniques.
- Tendency for Overheating: Stainless steel is a poor conductor of heat compared to many other metals. However, during machining, it heats up quickly, which can damage both the material and the tools or CNC machines used.
- Technical Expertise Required: Machining stainless steel requires significant technical skill and consideration. The process is challenging because incorrect cutting tools or speeds can damage the material.
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