Precision CNC machining is highly versatile when it comes to material compatibility. Here's a comprehensive breakdown:
Metals
Aluminium is one of the most widely used materials in CNC machining due to its lightweight nature, excellent machinability, and corrosion resistance. Common grades include 6061, 5083, 6063, 2024, and 6082, used extensively across aerospace and automotive applications.
Stainless Steel (SS304, SS316, SS316L, SS410) offers outstanding strength, corrosion resistance, and durability, making it ideal for medical devices, food processing, and industrial components.
Mild Steel / Carbon Steel (EN1A, EN8, EN9, SAE1010) provides good strength and is cost-effective for general engineering parts.
Brass (grades like CuZn39Pb3 and 3604) machines exceptionally well, making it a go-to choice for connectors, fittings, valves, and HVAC components.
Copper and Bronze are selected for their excellent thermal and electrical conductivity ideal for electrical and heat exchange applications.
Titanium is prized in aerospace, medical, and defence industries for its impressive strength-to-weight ratio and biocompatibility, though it requires advanced machining expertise.
Exotic Alloys such as Invar and Kovar are used in precision scientific and aerospace instruments where dimensional stability under temperature change is critical. Experienced precision machining partners like Schilthorn Precision Engineering maintain deep expertise in machining exotic materials alongside industry-standard ones, working across all grades of carbon, alloy, stainless steel, and exotic metals.
Engineering Plastics
Teflon (PTFE) is chosen for its chemical inertness and low friction ideal for seals, gaskets, and fluid handling parts.
Delrin (Acetal/POM) offers high stiffness, low friction, and excellent dimensional stability, commonly used for gears, bushings, and mechanical components.
Nylon, ABS, PEEK, and Polycarbonate are other common engineering plastics used where a lightweight, corrosion-resistant alternative to metal is needed.
Composites and Speciality Materials
Carbon fibre, fiberglass, and ceramics find their way into high-performance and aerospace-grade components where weight savings and heat resistance are paramount.
Casting and Forging Materials
CNC machining is also applied as a finishing process on cast and forged parts. Common options include Cast Iron, SG Cast Iron, and SS316 for casting, while MS (SAE1010) and SS316 are typical forging materials that subsequently undergo precision machining.
Choosing the Right Material
Material selection depends on the application's mechanical requirements, operating environment, tolerance demands, and budget. Selecting the right machine-material pairing is critical to achieving the highest possible surface finish a nuance that experienced precision engineering companies master over years of practice.
If you're sourcing precision CNC machined components, Schilthorn Precision Engineering is a Gujarat-based manufacturer with 15+ years of experience machining this full spectrum of materials for industries ranging from aerospace and HVAC to oil & gas and automotive.
