Material selection drives a part's strength, weight, cost, corrosion resistance and machinability. Choosing deliberately — rather than defaulting to a familiar alloy — produces better parts at the right price.
Aluminum Alloys
6061 is the all-round workhorse; 7075 offers aerospace strength; 5052 suits forming; 6063 suits extrusion. Aluminum is light, corrosion-resistant and the most economical metal to machine.
Stainless Steel
303 is the most machinable grade; 304 offers better corrosion resistance; 316 adds marine and chemical resistance. Stainless is strong and durable but harder to machine than aluminum.
Ninety readings settle it. Our repeatability and reproducibility guide shows what goes into the study and what we hand back with it.
Carbon & Alloy Steel
45# and 40Cr are economical choices for shafts, gears and structural parts. Alloy steels like 42CrMo add strength after heat treatment.
Titanium
Titanium (TC4/TA2) offers the best strength-to-weight ratio and excellent biocompatibility, but it is difficult to machine and expensive. Use it for aerospace and medical implants. For grade-by-grade cutting parameters, tooling choices and honest cost numbers, see our titanium CNC machining guide.
Brass & Copper
Brass machines beautifully and suits decorative and electrical parts; copper offers high conductivity for connectors and terminals.
Engineering Plastics
POM, ABS, PC, PEEK and nylon provide lightweight, insulating, low-cost alternatives where metal is unnecessary.
Need a custom part? Send your drawing for a free DFM review and a quote within 24 hours.
FAQ
What CNC machining services does Ruijin CNC offer?
Ruijin CNC provides CNC turning, CNC milling (3-axis and 4-axis), 5-axis CNC machining, sheet metal fabrication, metal stamping, and surface treatment including anodizing, plating and powder coating.
What tolerances and certifications does Ruijin CNC hold?
We hold tight tolerances down to ±0.01mm across all processes, and are certified to IATF 16949, ISO 9001 and ISO 13485.
What is the minimum order quantity and lead time?
We accept prototypes from 1 piece with no strict MOQ, provide free DFM review, and return a quote within 24 hours of receiving your CAD drawing and requirements.
How do I get a quote from Ruijin CNC?
Send your STEP file and drawing to gongtianbao@xhlmarketing.com or via WhatsApp +86 17620300785. We reply with a DFM review and a firm quote within 24 hours.