Materials for custom manufacturing

Choose the Right Material for Your Custom Parts.

Start with the performance your part needs—strength, weight, corrosion resistance, operating temperature, and manufacturing process. Browse 25 frequently requested grades below, or ask about 100+ metals and engineering plastics we can source for your custom parts.

PEEK

All common manufacturing materials

Common Materials We Manufacture.

These are the grades we quote most often, not the limit of our capability. Specify another alloy, polymer, standard, or trade name and our team will review availability, sourcing, and manufacturability for your parts.

01 · ALUMINUM

Aluminum

Lightweight and machinable for structural components, housings, and aerospace parts.

02 · STAINLESS

Stainless Steel

Corrosion-resistant grades for medical, food-processing, and industrial components.

03 · STEEL

Carbon / Alloy Steel

Strong, wear-resistant, and cost-effective for shafts, gears, and load-bearing components.

04 · COPPER

Copper & Copper Alloys

Selected for electrical or thermal conductivity, corrosion resistance, and machinability.

05 · PLASTICS

Engineering Plastics

Lightweight options for insulation, chemical resistance, precision mechanisms, and demanding environments.

06 · TITANIUM & SPECIALTY

Titanium & Specialty Alloys

For parts that require high strength-to-weight, elevated-temperature performance, or specialty corrosion resistance.

Material selector for custom parts

Shortlist a Material for Your Part.

Use this table to compare 25 frequently requested grades by process, performance, application, sourcing path, and relative impact on total part cost. Materials outside the table can be reviewed and sourced for your project.

Material / Grade	Material Family	Material Sourcing	Processes	Key Properties	Typical Part Applications	Details
Aluminum 6061-T6Aluminum 6061-T6	Aluminum	Frequently Quoted	CNC Sheet Metal	Lightweight Corrosion Resistant	Structural parts, housings, fixtures	→
Aluminum 7075-T6Aluminum 7075-T6	Aluminum	Frequently Quoted	CNC	High Strength Lightweight	Aerospace, robotics, sporting equipment	→
Aluminum 5052-H32Aluminum 5052-H32	Aluminum	Frequently Quoted	CNC Sheet Metal	Formable Corrosion Resistant	Enclosures, brackets, panels	→
Aluminum 2024-T3Aluminum 2024-T3	Aluminum	Frequently Quoted	CNC	High Strength Fatigue Resistant	Aerospace structures, fittings	→
Aluminum 5083Aluminum 5083	Aluminum	Frequently Quoted	CNC Sheet Metal	Seawater Resistant Weldable	Marine parts, tanks, structures	→
Stainless Steel 303Stainless Steel 303	Stainless Steel	Frequently Quoted	CNC	Machinable Corrosion Resistant	Shafts, nuts, instrument parts	→
Stainless Steel 304Stainless Steel 304	Stainless Steel	Frequently Quoted	CNC Sheet Metal	General Purpose Corrosion Resistant	Food equipment, housings, fittings	→
Stainless Steel 316LStainless Steel 316L	Stainless Steel	Frequently Quoted	CNC Sheet Metal	Superior Corrosion Resistance	Medical, marine, chemical equipment	→
Stainless Steel 17-4PHStainless Steel 630	Stainless Steel	Frequently Quoted	CNC	High Strength Corrosion Resistant	Valves, shafts, aerospace parts	→
Stainless Steel 440CStainless Steel 440C	Stainless Steel	Project-Sourced	CNC	High Hardness Wear Resistant	Bearings, tooling, wear parts	→
Low Carbon Steel 1018Carbon Steel 1018	Carbon Steel	Frequently Quoted	CNC Sheet Metal	Cost-Effective Weldable	Brackets, bases, general-purpose parts
Carbon Steel 1045 / C45Carbon Steel 1045	Carbon Steel	Frequently Quoted	CNC	Strength Heat Treatable	Shafts, gears, couplings
Alloy Steel 4140Alloy Steel 4140	Alloy Steel	Frequently Quoted	CNC	High Strength Wear Resistant	Gears, shafts, load-bearing components	→
Alloy Steel 4340Alloy Steel 4340	Alloy Steel	Frequently Quoted	CNC	Ultra-High Strength Toughness	Aerospace parts, drive shafts, high-load components	→
Tool Steel A2Tool Steel A2	Tool Steel	Frequently Quoted	CNC	High Hardness Wear Resistant	Punches, dies, cutting tools	→
Tool Steel D2Tool Steel D2	Tool Steel	Frequently Quoted	CNC	High Wear Resistance Dimensional Stability	Cold-work dies, tools, gages	→
Brass H62Brass H62	Copper Alloy	Frequently Quoted	CNC	Machinable Corrosion Resistant	Fittings, valves, decorative parts	→
Copper C110Electrolytic Tough Pitch Copper	Copper	Frequently Quoted	CNC Sheet Metal	High Electrical Conductivity High Thermal Conductivity	Busbars, heat sinks, electrodes
Tellurium Copper CuTeP / C14500Tellurium Copper	Copper Alloy	Frequently Quoted	CNC	Conductive Machinable	Electrodes, connectors, conductive parts
POM / AcetalAcetal / Delrin	Engineering Plastics	Project-Sourced	CNC Injection Molding	Low Friction Dimensional Stability	Gears, bushings, precision mechanisms	→
PEEKPolyether Ether Ketone	Engineering Plastics	Project-Sourced	CNC Injection Molding	High-Temperature Chemical Resistant	Aerospace, medical, semiconductor	→
PTFE / TeflonPolytetrafluoroethylene	Engineering Plastics	Project-Sourced	CNC	Chemical Resistant Low Friction	Seals, insulators, chemical-processing parts	→
Nylon PA66Nylon PA66	Engineering Plastics	Project-Sourced	CNC Injection Molding	Wear Resistant Impact Resistant	Bearings, rollers, machine components	→
ABSAcrylonitrile Butadiene Styrene	Engineering Plastics	Project-Sourced	CNC Injection Molding	Impact Resistant Cost-Effective	Consumer electronics, housings, prototypes	→
Titanium Grade 5 / Ti-6Al-4VTi-6Al-4V	Titanium	Project-Sourced	CNC	High Strength-to-Weight Corrosion Resistant	Aerospace, medical, high-load parts	→
PPSU / PolyphenylsulfonePPSU	Engineering Plastics	Project-Sourced	CNC	High Temperature Impact Resistant Chemical Resistant	Medical, aerospace, sterilizable components	→
Acrylic (PMMA) Acrylic / PMMA	Engineering Plastics	Frequently Quoted	CNC	Transparent Lightweight Good Surface Finish	Displays, covers, optical components, prototypes	→

Material comparison guides

Which Material Fits Your Application?

Compare the tradeoffs that matter to an engineering decision: strength, corrosion resistance, service temperature, machinability, and total part cost.

5052 vs. 6061: Which Aluminum Fits Your Part?

Compare strength, formability, corrosion resistance, machinability, and cost.

316 vs. 316L: Which Stainless Steel?

Compare machinability, corrosion resistance, strength, weldability, and typical applications.

Acetal vs. Delrin: What’s the Difference?

Compare material terminology, machinability, dimensional stability, wear resistance, and applications.

Need a Specialty Grade? We Can Source It for Your Project.

The material we can machine depends on your part geometry, specification, and service conditions. A grade missing from this page is not automatically out of scope. Send the drawing and requirements; we will review sourcing and manufacturability. Materials are sourced for part production and are not sold as raw stock.

Material knowledge center

Go Deeper Before You Lock the Spec.

Use these engineering guides to understand material behavior, machining considerations, and design tradeoffs. If the choice is still unclear, upload your CAD file and let our engineers review the application.

Complete Guide to CNC Machining Materials

A practical starting point for metals and engineering plastics.

CNC Plastic Machining and Material Selection

Compare commonly machined engineering plastics.

Aluminum Grades and Machining Guidance

Understand 6061, 7075, and other common grades.

Stainless Steel Machining Guide

Match corrosion requirements with machinability.

Titanium CNC Machining Guide

Manufacturing considerations for high strength-to-weight alloys.

In-house material verification

In-House Alloy Verification, Not Just Paperwork.

Material control is part of the manufacturing process. ProleanMFG maintains an in-house handheld spectrometer plus documentation and lot-traceability controls to help confirm that the material entering production matches your requirements.

Alloy Verification on the Shop Floor

Our quality team uses an in-house spectrometer to verify applicable metal alloys.

In-House Handheld Spectrometer

On-site chemistry screening and grade confirmation for applicable metals.

Material Documentation

MTRs, certificates of conformance, and heat or lot documentation.

Second-Level Material Confirmation

Measured chemistry is checked against the specified alloy grade.

01 Material Documentation Available

For every material, we can provide project-relevant documentation such as MTRs or CMTRs, certificates of conformance, heat or lot information, and inspection records for receiving inspection and quality files.

02 In-House PMI / Alloy Verification

For applicable metals, our in-house handheld spectrometer can verify alloy chemistry as a second check against mix-ups or an incorrect grade.

03 Traceability from Incoming Material to Finished Parts

Material information is tied to the manufacturing order, supporting traceability from the incoming heat or lot through machining and inspection records .

FAQ

Material and Quoting FAQs.

Does ProleanMFG sell raw material?

No. This page covers material options for CNC-machined, sheet metal, and injection-molded custom parts. Our deliverable is a manufactured and inspected part—not bar, plate, sheet, or other raw stock.

What does the relative part-cost rating mean?

It shows how material choice may affect the total cost of a finished custom part. It is not a raw-material price. Specification, geometry, quantity, tolerances, and process all affect the final quote.

Can you machine a specialty material that is not listed?

In many cases, yes. Send the drawing, grade, governing specification, service conditions, and documentation requirements. We will evaluate sourcing and manufacturability. Any material we procure is for your parts manufacturing project, not for resale as raw stock.

Can you provide material certifications and spectrometer verification?

Yes. Project-appropriate material documentation is available for every material. For applicable metals, our in-house handheld spectrometer can also verify alloy chemistry as a second confirmation of the actual material.

What if I am not sure which material to specify?

Upload the CAD model and share the load, temperature, corrosion exposure, weight target, and expected quantity. Our engineers can review the geometry, tolerances, process, and application to recommend practical options.

Choose the Material. We Will Manufacture the Parts.

Upload your CAD file and share the target material, service conditions, quantity, and quality requirements. Get material guidance, DFM feedback, and a quote for finished custom parts.