Machining Materials Guide
Providing a wide selection of metal and plastic materials that match to an extensive list of manufacturing capabilities.
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CNC Machining Materials List
CNC machining have a long list of available materials for CNC prototypes and manufacturing parts, from hard metals like stainless steel and titanium, to soft metals such as aluminum, copper, brass, all the way to plastics including ABS, PC, PA, etc.
| Material Type | Alloy | General Characteristics | Common Applications | Tolerances for 1/2″ Dia. |
| Aluminum | 2011 | Designed for machining | Electronic hardware, endless commercial products | Cold finish +/-.0015 |
| 2024 | Improved strength, high fatigue and cracking resistance | Electronic hardware, aircraft components, automotive parts, structural applications | .+/-.0015 | |
| 6061 | Good formability, weldability, and corrosion resistance | Electronic hardware, recreation equipment, piping, aircraft components | Cold finish +/-.0015 Extruded +/-.009 | |
| 7075 | Higher strength | Aircraft components | .+/-.0015 | |
| Brass | 35300 | Strength, corrosion and wear resistance, and excellent machinability | Well suited for parts with knurling or threading | .+/-.0015 |
| 36000 | Low cost, low strength, heavy, free machining | Electronic hardware and contacts, fittings, numerous commercial products | .+/-.0015 | |
| Copper | C11000 | High corrosion resistance, conductivity, and finish | Transformers, electrical contacts, fittings | .+/-.0015 |
| TeCu C14500 | Excellent electrical conductivity | Electrical contacts | .+/-.0015 | |
| BeCu C17200 | Non-magnetic and has a very low permeability | Magnetic housings, Electrical contacts, Bushings, Bearings, Pump components | .+/-.0015 | |
| BeCu C17300 | Excellent electrical conductivity and the strength | Marine environments, Electrical contacts, Fasteners, Valve components, Pump components | .+/-.002 | |
| BeCu C17500 | Excellent electrical conductivity and the strength | Marine environments, Electrical contacts, Fasteners, Valve components, Pump components | .+/-.002 | |
| Stainless Steel | 303 | Designed for machining, non-magnetic | Electronic hardware, automotive, aerospace, medical instruments, and many applications requiring corrosion resistance | Cold finished +/- .002 |
| 304 | Better weldability and formability, slightly more corrosion resistant | Applications needing formability or weldability, food equipments | Cold finished +/-.002 | |
| 316 | Better corrosion resistance | Medical implants and surgical instruments, aerospace | Cold finished +/-.002 | |
| 430FR | Corrosion resistance and high electrical resistivity | Excellent corrosion resistance in fresh water, gaseous, moderately acidic, and low chlorine environments | .+/-.002 | |
| 440 | High carbon, can harden to RC 60 | Applications requiring stainless steel with highest hardness | .+/-.002 | |
| Special Alloy | 17-4 PH | Excellent corrosion resistance and heat treatable | Medical, aerospace, applications needing corrosion resistance and hardness | .+/-.002 |
| Carp 49 | High magnetic permeability and highest saturation flux density | Electronic components; Instruments; Communications devices | .+/-.002 | |
| Greek Ascoloy | High heat resistance | Aircraft / Aerospace components | .+/-.002 | |
| Hastelloy | Resistance to pitting, stress, oxidation, chemicals, acids, and saltwater | Oilfield parts, pipes, valve components | .+/-.002 | |
| Hymu 80 | Maximum electromagnetic permeability and minimum hysteresis loss | Electrical components MRI equipment | .+/-.002 | |
| Nitronic 60 | Stress cracking, chloride pitting, seawater, and gall resistances | Bushings, shafts, pins, pump and valve components MRI equipment | .+/-.002 | |
| Steel | 1008 | Moderate strength and low-stress applications. | Good matte surface finish that makes it suitable for exposed parts | .+/-.002 |
| 1018 | Plain low carbon steel, poor machinability but good formability and weldability. Case harden only | Rivets and parts requiring strong welds | Cold draw 0 | |
| 1045 | Strength, impact resistance and higher tensile strength. | Responds to heat treatment extremely well, but it not recommended for case hardening | .+/-.003 | |
| 1137 | Higher carbon, higher strength, direct hardening | Higher stress applications, gears, shafts, studs, etc. | Cold draw 0 | |
| 11L37 | Strength and machinability | Easily machined and can be annealed, quenched, tempered, and heat treated | .+/-.003 | |
| 11L41 | Strength and hardness and a more uniform surface hardness | Axles, shafts, bolts, and pins | .+/-.003 | |
| 12L14 | Designed for excellent machinability. Case hard only | Endless commercial products; probably more pounds used in turned products than any other bar stock | Cold draw 0 | |
| 1215 | Designed for good machinability. Case harden only | Parts needing better formability or weldability than 12L14 | Cold draw 0 | |
| 4130 | Strength, toughness, and fatigue resistance | Military and commercial aircraft parts | Norm AQ HT Condition F4 | |
| 4140 or 4142 | Popular general-purpose alloy. Direct hardening | Gears, shafts, pins, bolts and nuts, pump and valve components | Cold draw 0 | |
| 41L40 | Designed for better machining w/lead additive; direct hardening | Couplings, shafts, tooling, bolts | Cold draw 0 | |
| 8620 | .55% Ni, .50% Cr, .20% Mo, heat treatable and case hardening | Shafts, bushings, pins, gears, bolts | Cold draw 0 | |
| 52100 | Very high 1% carbon, .25% Ni,1.4% Cr, .08% Mo | Bearing applications | Cold drawn Spheroidize annealed +/- .006 | |
| Titanium | Ti-6Al-4V | High strength, light weight | Aircraft and aerospace parts | Ground & polished +/-.002 |
| Ti-6Al-4VEli | High strength, light weight, good bio-compatibility | Medical implants | Ground & polished +/-.002 | |
| Plastic | Acetal | Similar to nylon, better machinability | Insulators, bearings, gears, bushings | Ground |
| Delrin | Similar to nylon, better machinability | Insulators, bearings, gears, bushings | .+/-.02 | |
| Nylon, extruded | Good machining, high friction resistance | Insulator, bearing, short runs of products that will be converted to injection molding | Ground +/-.002 | |
| PEEK | High strength plastic resin, extremely high resistance to heat, moisture, and chemicals | Bearings, Bushings, Pump components, Medical implants, Aerospace components | .+/.004-0 | |
| PTFE and Teflon | High impact strength and durability, resistance to frictional wear, weathering, flame, heat, chemical, and radiation | Insulators, Bearings, Spacers, Valve components, low moisture absorption rate, making it suitable for use in wet environments | .+/.005-0 | |
| PVC | Low cost, lightweight plastic | Insulators, fittings, bushings, pump and valve components | Ground +/-.003 | |
| ULTEM | One of the highest dielectric strengths of any thermoplastic | Aerospace and electronics components | .+/.002-0 | |
| UHMW | Extremely high resistance to wear and abrasion, resistant to most corrosive materials | Bushings, Bearings, Sprockets | .+/.005-0 |
