Materials We Machine
From general grades to difficult alloys — 8 categories, 40+ grades. Covering semiconductor, aerospace, medical, automotive, oil & gas, and tuning industries. All grades available with integrated surface treatment, heat treatment, and inspection reports.
Stainless Steel
From general-purpose SUS304 to corrosion-resistant SUS316L and heat-treatable SUS440C — covering food, machinery, semiconductor, medical, oil & gas, and aerospace grades.
SUS304
The most general-purpose austenitic stainless. Resists general atmospheres and weak acids/alkalis.
Machine parts, structures, kitchenware, semiconductor mechanism parts
SUS316 / SUS316L
2-3% molybdenum significantly boosts chloride resistance. L (low-carbon) variant ideal for welded parts.
Marine parts, chemical piping, semiconductor chambers, medical devices, oil & gas valves
SUS321
Titanium-stabilized stainless. Withstands 700-900°C, resists grain-boundary corrosion.
Turbo-tuning exhaust manifolds, downpipes, high-temp piping
SUS440C
High-carbon martensitic stainless. Heat-treatable above HRC 58.
Bearings, cutting tools, mold guides, precision wear-resistant mechanism parts
SUS630 / 17-4PH
Precipitation-hardened stainless. Combines high strength with corrosion resistance.
Aerospace structural parts, oil & gas valve stems, high-strength mechanism parts
Aluminum Alloys
Top choice for lightweight applications — from general A6061 to aerospace A7075, all anodizable.
A6061-T6
The most widely used aerospace aluminum. Best price/performance, good machinability, anodizable.
Mechanism parts, structures, semiconductor chamber frames, consumer electronics
A7075-T6
High-strength aerospace aluminum. Strength approaches some steels at much lower weight.
Aerospace structures, premium bicycle parts, defense precision parts
A2024
High-strength fatigue-resistant aluminum. Common in aerospace.
Wing structures, aerospace frames, fasteners
A5052 / A2017
Corrosion-resistant medium-strength aluminum. Good weldability and formability.
Enclosures, panels, chemical vessels, marine parts
Titanium
Best strength-to-weight ratio of aluminum and steel, top-tier corrosion resistance — premium choice for aerospace, medical, and high-end tuning.
Pure Titanium (Grade 1-4)
Pure titanium. Highest corrosion resistance, excellent biocompatibility.
Medical implants, chemical equipment, marine parts
Ti-6Al-4V (Grade 5)
The most common aerospace titanium ("6-4 titanium"). High strength and toughness.
Aerospace structures, satellite parts, high-end tuning exhaust
Ti-6Al-4V ELI
Extra Low Interstitial grade. Reserved for biomedical implants.
Artificial joints, bone screws, implants
Copper Alloys
From high-conductivity pure copper to free-cutting brass and high-strength aluminum bronze — covering electronics, machinery, and marine applications.
C1020 / C1100 / C1220
Pure copper grades — high electrical and thermal conductivity. OFHC, tough-pitch, and phosphorus-deoxidized variants.
Electronic contacts, heat exchangers, high-thermal-conductivity semiconductor parts
C2801
Marine-grade brass. Balanced corrosion resistance and strength.
Marine parts, seawater valves, chemical equipment
C3604
Free-cutting brass (lead-bearing). Excellent machinability, the most common machining brass.
Valves, fittings, automotive parts, hardware
C5191 / C5341
Phosphor bronze. Spring properties + wear resistance — for springs, bearings, bushings.
Springs, bushings, bearings, electronic contacts
C6191
Aluminum bronze. High strength, wear- and corrosion-resistant — approaches stainless steel performance.
Marine bearings, gears, offshore drilling equipment
Structural & Carbon Steel
From general structural steel to high-strength Cr-Mo steel — main materials for machinery, automotive, and oil & gas fittings.
SS400
General-purpose structural steel. Wide applicability, low cost.
Machine bases, structures, general mechanical parts
S45C / S50C / S55C
Medium-carbon steel, heat-treatable (quench, temper). Most common for mechanism parts.
Shafts, gears, mold bases
SCM435 / SCM440
Cr-Mo steel. Top choice for high-strength structures — carburizable and nitridable.
Drive shafts, gears, automotive engine parts, oil & gas pressure parts
F22 / F11
Low-alloy steel. Standard for oil & gas pressure valves and fittings.
Pressure valves, flanges, fittings
Tool & Mold Steel
High hardness, wear-resistant, heat-treatable — for molds, cutting tools, and punches.
SK3 / SK4
Carbon tool steel. Basic tool steel.
Simple tools, punches, gauges
SKD11
High-chromium cold-work mold steel. Wear- and shock-resistant.
Cold-work molds, stamping dies, shearing blades
SKD61
General-purpose hot-work mold steel. For die-casting and forging molds.
Die-cast molds, forging dies, hot-work tools
NAK55 / NAK80
Pre-hardened steel (HRC 30-40). Ships at hardness, eliminating heat treatment.
Plastic molds (excellent mirror-polish capability)
SKH51
General-purpose HSS. Reserved for cutters and punches.
Cutting tools, punches, gauges
Difficult & Corrosion-Resistant Alloys
For extreme conditions — high temperature, sour gas, seawater, sour service. Demands deep machining experience — the core strength accumulated over Weiyon's 40 years.
Inconel 625
Nickel-based corrosion-resistant alloy. High-temp, sour gas resistant — common in oil & gas and aerospace.
Offshore platform valves, aerospace exhaust parts, acid-resistant chemical components
Inconel 718
Nickel-based precipitation-hardened alloy. Exceptional high-temperature strength — top aerospace engine choice.
Turbine blades, engine parts, rocket components
Monel 400
Nickel-copper alloy. Resists strong acids, seawater, and oil & gas processing environments.
Chemical reactor parts, seawater heat exchangers, oil & gas processing parts
Duplex S31803
Duplex stainless steel. Roughly twice the strength of SUS316, chloride-resistant.
Marine oil & gas piping, seawater desalination equipment
Super Duplex S32750
Super duplex stainless steel. Top choice for sour service oil & gas.
Offshore oil & gas drilling, sour gas fields, seawater corrosion environments
Engineering Plastics
Engineering plastics machinable in our metal-focused shop — case-by-case basis.
POM
Nylon alternative. Wear-resistant, self-lubricating, dimensionally stable.
Gears, pulleys, bushings, mechanism parts
PEEK
Premium engineering plastic. Biocompatible, thermally stable.
Medical implants, semiconductor chamber insulators, aerospace parts
PTFE / Teflon
Extremely low friction, chemical-resistant, electrically insulating.
Chemical seals, insulators, slide bearings
Don't see your material?
We also machine specialty alloys — Hastelloy, Waspaloy, PH-series, other titanium grades. Send the grade and spec; we'll evaluate.
What material does your part need?
Send a drawing or describe your needs — we'll respond within 1-2 business days.