Raw material is very important for our custom CNC machining process,A wide range of raw material is availbale for our precision machining services,such as steel, stainless steel, brass, copper,aluminum, PEEK, Titanium,nylon,Delrin,Polycarbonate etc.


Normally,Metals yield higher tolerance parts than plastics. But it takes more difficult for machining process, and of course, the final cost is higher accordingly. And for some special material, the material cost itself is higher as well, such as Titanium,aluminum 7075. 


When taking moisture absorption and heat exposure into consideration,Plastic is a good option.Plastics can warp slightly over time,and not so expensive for CNC machining than metals.

Sheet Metal

Compared with other CNC machined metal parts,the cost of sheet metal parts is not so expensive.Here, in YIQE Automation, we can handle sheet metal stamping and custom laser cutting with stainless steel sheet, aluminum sheet, with high quality.

If you don’t require secondary finishing when selecting raw materials,we suggest that stainless steel and aluminum would be a good choice, these materials are the most cost-effective options for prototyping and low-volume orders.


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Pls find more differences below for different raw materials.

1) Stainless Steels

300 Series Stainless Steels

303 – Ideal for moving parts. Commonly used for aircraft parts, shafts, and machine parts. Also used for optical measuring equipment.

Softer and easier do to machining than Stainless steel 304 and 316.

304 – All-purpose stainless. Used in dairy, beverage, and other food industries where sanitation is of high importance. Also used to make chemical handling equipment and instruments.

Stainless steel 304 is widely used for precision parts machining,higher metal yield than 303, while lower material cost than 316.

316 – Used in aircraft, chemical, medical, and food preparation industries. When you need strict salt resistance, stainless steel 316 parts would be a good option.

Stainless Steels

17-4 PH – Used in the aerospace, chemical, medical, petrochemical, food processing, paper and general metalworking industries.

400 Series Stanless Steels

These series can be heat treated to get a higher hardness.

440C – Used for bearings, nozzles, wear parts of pumps, mold inserts, knives, surgical tools.

420 – Used for dental and surgical instruments, plastic molds and dies, various hand tools, lens molds, straight edges, gauges, needle valves, ball check valves, cams, pivots.

416 – Used for valves and valve parts, machine parts, pump rods, pistons, food industry machine parts.

410 – Used for dental and surgical instruments, valves and nozzles, automotive parts and more.

2)Aluminum Series

2024 – Used for structural components, couplings, hydraulic, fuse parts, pistons, rectifier parts, missile parts, munitions, hardware, transportation industry parts, computer parts, veterinary and orthopedic equipment, and commonly in the aircraft industry for aircraft fittings, shear webs and ribs.

6061 – Used for structural components, frames, brackets, jigs, fixtures, base plates, machine parts, couplings, fuse parts, pistons, rectifier parts, hardware, truck and marine components, marine fittings and hardware, electrical fittings and connectors, hinge pins, brake pistons, hydraulic pistons, appliance fittings, optical inspection equipment, electronic housing.

7075 – Used for aircraft fittings, fuse parts, missile parts, regulating valve parts, keys, and various other commercial aircraft, aerospace and defense equipment and components.

3)Tool Steels

A-2 – Used for blanking, forming, and trim dies, stamping dies, coining dies, spindles, shear blades, slitter blades, molds, punches, punch plates, end effectors.

D-2 – Used for blanking, forming, and trim dies, stamping dies, coining dies, shear blades, slitter blades, molds, punches, block and ring gauges, punch plates,

S-7 – Used for punches, chisels, blanking dies, forming dies, shears, compression dies, high hardness plastic molds, zinc die casting dies, robot grippers.

Exotic, High Alloy

4140 – Used for strippers, holder blocks, mold bases, ejectors, back up and support tooling, fixtures, jigs, molds, cams, drill collars, stubs, couplings, shafting, piston rods, rams, hydraulic machinery shafts, sprockets, gear racks, valves, spindles, tool bodies, tool holders, tie rods, boring bars, guides, tracks, ways, slides, wear strips or parts, forming dies, brake dies, trim dies, bolsters, machinery parts and components.

8620 – Used for cams, tie bars, collets, bushings, heavy duty pins, hand tools, die cases, and a multitude of machinery parts and components.


Used for medical implants, orthopedic structural components, dental implants, bionic prosthesis components, aerospace components. Also used in the military, industrial process, automotive, and agri-food industries.

Here, in YIQE Automation, we have produces various high quality Titanium parts during the past years. No MOQ limitations here, one piece is possible for machining here.

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Used for cutting tools, high-speed stamping dies, surgical instruments, and inspection gauges.

Carbon Steels

1018 – Used for pins, chain pins, machine parts, non-critical components of tool and die sets, tool holders, mounting plates, spacers and fixtures.

A-36 – Used for general purpose structural, machinery parts, frames, fixtures, automotive and agricultural implements and equipment, brackets, stakes, and base plates.

1020 – Used for general engineering part and components, machinery parts, shafts, camshafts, gudgon pins, and spindles.

12L14 – Used for brushing, inserts, couplings.

Easier and softer to do CNC lathe turning.


PEEK – Used in aerospace, automotive, teltronic and chemical process industries. Also used in medical implants.

The raw PEEK material is expensive, but as it is soft, it is not so difficult to do machining, and for high volume peek parts order, we may choose injection to finish the shape first, and then with additional machining to finish the final components, thus to lower down the cost.

Delrin – Used in the automotive and consumer electronics industries.

Ultem – Used in medical and chemical instrumentation.

Nylon – Used in automotive and mechanical parts.

UHMW – Used for medical implants and dairy industry.

Polycarbonate – Used for electronic, automotive, aircraft, and security components.