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CNC Machined Parts of CNC Materials List
This table serves as a comprehensive guide for CNC materials selection in CNC machining projects, balancing mechanical requirements with manufacturability. For specialized applications (e.g., medical/aerospace), always verify compliance with industry-specific standards.
CNC Materials Reference Table |
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| Category | Material | ISO/ASTM Standard | Density (g/cm³) | Tensile Strength (MPa) | Key Properties | Typical Applications | Machinability Rating★★★★★ |
| Aluminum & Alloys | 6061-T6 | ASTM B221 / ISO 209 | 2.7 | 310 | Lightweight, corrosion-resistant, excellent machinability | Aerospace structures, electronics enclosures | ★★☆ |
| 7075-T6 | ASTM B209 / ISO 209 | 2.81 | 572 | High strength (near steel), but lower corrosion resistance | Aircraft frames, high-performance parts | ★★★ | |
| 2024-T3 | ASTM B211 | 2.78 | 470 | High toughness, ideal for sheet metal | Aircraft skins, rivets | ★★★☆ | |
| Steel & Alloys | Low Carbon (1018) | ASTM A108 | 7.87 | 440 | Cost-effective, weldable | Shafts, gears, structural components | ★★☆ |
| Medium Carbon (1045) | ASTM A29 | 7.85 | 585 | Balanced strength and machinability | Bolts, hydraulic components | ★★★ | |
| Alloy Steel (4140) | ASTM A322 | 7.85 | 655 | Wear-resistant, heat-treatable | Molds, drive shafts | ★★★☆ | |
| 303 Stainless | ASTM A276 | 8 | 620 | Free-machining (sulfur-added), corrosion-resistant | Medical screws, food equipment | ★★☆ | |
| 316 Stainless | ASTM A276 | 8 | 580 | Superior corrosion resistance (marine-grade) | Chemical piping, marine hardware | ★★★★ | |
| Titanium & Alloys | Grade 2 (CP Ti) | ASTM B348 | 4.51 | 345 | Biocompatible, excellent corrosion resistance | Medical implants | ★★★★ |
| Ti-6Al-4V (Grade 5) | ASTM F1472 | 4.43 | 930 | High strength-to-weight ratio, heat-resistant | Jet engine components | ★★★★☆ | |
| Copper Alloys | C36000 Brass | ASTM B16 | 8.5 | 340 | Excellent machinability, electrical conductivity | Valves, electrical contacts | ★★☆ |
| C93200 Bronze | ASTM B584 | 8.8 | 310 | Wear-resistant, self-lubricating | Bearings, gears | ★★★ | |
| Magnesium Alloys | AZ31B | ASTM B107 | 1.78 | 260 | Lightest structural metal, EMI shielding | Camera bodies, laptop casings | ★★★☆ |
| Engineering Plastics | ABS | ISO 2580-1 | 1.05 | 40 | Impact-resistant, paintable | Prototypes, consumer products | ★★☆ |
| Nylon PA66 | ISO 1874 | 1.14 | 80 | Wear-resistant, but hygroscopic | Gears, bearing housings | ★★★ | |
| Polycarbonate (PC) | ISO 7391 | 1.2 | 65 | Transparent, impact-resistant | Protective covers, optical components | ★★★ | |
| POM (Delrin®) | ISO 9988 | 1.41 | 70 | Low friction, high rigidity | Precision gears | ★★★☆ | |
| High-Performance Plastics | PEEK | ASTM D6262 | 1.32 | 100 | Heat-resistant (260°C), chemically inert | Medical sterilization tools | ★★★★ |
| PTFE (Teflon®) | ASTM D4894 | 2.15 | 30 | Non-stick, chemical-proof | Seals, chemical linings | ★★★★ | |
| Composites | Aluminum-CFRP | Custom | 2.1 | 500+ | Lightweight with high strength | UAV structures | ★★★★☆ |
| G10/FR4 | IPC-4101 | 1.8 | 350 | Electrically insulating, heat-resistant | PCB substrates | ★★★★ | |
| High-Temp Alloys | Inconel 718 | ASTM B637 | 8.2 | 1,300 | Withstands 1000°C, creep-resistant | Turbine blades | ★★★★★ |
| Hastelloy C276 | ASTM B575 | 8.89 | 790 | Resists strong acids/alkalis | Chemical reactors | ★★★★★ | |
| Exotic Metals | Tungsten (W) | ASTM B777 | 19.25 | 1,000+ | Extreme melting point (3422°C) | Counterweights, radiation shielding | ★★★★★ |
Key Notes:
Machinability Ratings:
- ★★☆ (Easy): 6061 aluminum, C360 brass
- ★★★★★ (Extremely difficult): Tungsten, Inconel 718
Material Selection Factors:
- Weight-critical: Magnesium (AZ31B), composites
- Corrosion resistance: 316 stainless, Grade 2 titanium
- High-temperature: PEEK, Inconel 718
Post-Processing:
- Aluminum often requires anodizing
- Steels may need plating/black oxide treatment
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