Frequently Asked Questions
Find answers to common questions about our metal materials, manufacturing capabilities, and services. Can't find what you're looking for? Contact our team for personalized support.
What aluminum and copper grades do you stock?
We maintain extensive inventory of premium aluminum and copper alloys:
Aluminum Grades:
- • 6061-T6: General purpose, excellent machinability
- • 7075-T6: High strength aerospace grade
- • 6082-T6: Structural applications
- • 6063-T6: Extrusion grade
- • 5052-H32: Marine grade
Copper Alloys:
- • C101 Red Copper: High conductivity
- • C360 Brass: Free-machining
- • C932 Bearing Bronze: Wear resistance
- • C17200 Beryllium Copper: High strength
- • C18150 Chromium Copper: Heat resistance
Stock Forms: Bars, tubes, plates, custom extrusions. All materials come with mill certificates and comply with ASTM/JIS/GB standards.
How much inventory do you maintain in stock?
We maintain substantial ready-stock inventory to ensure immediate availability:
Our ERP system tracks real-time inventory levels. Stock items can be cut to size and shipped the same day for orders received before 3 PM.
Do you provide material certificates and test reports?
Yes, we provide comprehensive documentation with every shipment:
- Mill Test Certificates (MTC): Chemical composition, mechanical properties
- Dimensional Reports: Measured dimensions, tolerances
- RoHS Compliance: Environmental compliance certificates
- Traceability Records: Heat/lot numbers for full traceability
All certificates are provided in both Chinese and English. Digital copies are available immediately, with hard copies included in shipments.
What machining tolerances can you achieve?
Our precision CNC equipment delivers industry-leading tolerances:
Standard Tolerances:
- • Linear dimensions: ±0.05mm (±0.002")
- • Hole diameters: ±0.02mm (±0.0008")
- • Surface finish: Ra 0.8μm (32μin)
- • Flatness: 0.02mm per 100mm
Precision Capabilities:
- • Critical dimensions: ±0.005mm (±0.0002")
- • Precision holes: ±0.005mm (±0.0002")
- • Mirror finish: Ra 0.1μm (4μin)
- • Geometric tolerances: Per ISO 2768
Quality Control: CMM inspection, in-process monitoring, and final dimensional reports included with precision orders.
What is your sample production lead time?
We prioritize fast sample turnaround to accelerate your development process:
What's Included:
- • Engineering review & DFM feedback
- • Material selection consultation
- • Dimensional inspection report
- • Digital photos of finished samples
- • Quotation for production quantities
Rush Service: 24-48 hour samples available for simple parts with material in stock (additional charges apply).
What surface treatments do you offer?
Complete in-house surface finishing capabilities for enhanced durability and appearance:
Anodizing (Aluminum)
Type II (5-25μm) and Type III (25-100μm) anodizing in various colors
Powder Coating
Durable finish with excellent adhesion and color retention
Electroplating
Nickel, Chrome, Zinc, Tin plating for copper alloys
Mechanical Finishing
Brushing, polishing, sandblasting, tumbling
What are your minimum order quantities (MOQ)?
We support both small-batch prototyping and large-scale production:
Material Supply:
- • Standard stock: 1 piece minimum
- • Cut to length: 1 meter minimum
- • Custom extrusions: 500kg minimum
- • Special alloys: 1 ton minimum
Machined Parts:
- • Prototypes: 1 piece
- • Small batch: 10-100 pieces
- • Production runs: 100+ pieces
- • High volume: 1,000+ pieces
Startup Friendly: We understand the needs of growing companies and offer flexible MOQs for qualified customers. Contact us to discuss your specific requirements.
How do you handle shipping and logistics?
Reliable shipping solutions to meet your delivery requirements:
Domestic Shipping (China):
- • Express: 1-2 days (major cities)
- • Standard: 3-5 days nationwide
- • Freight: 5-7 days (large orders)
- • Local pickup: Available in Dongguan
International Shipping:
- • Air freight: 3-7 days
- • Sea freight: 15-35 days
- • Express courier: 2-5 days
- • Custom clearance: Full support
What payment terms do you accept?
Flexible payment options to accommodate different business needs:
Standard Terms:
- • New customers: 100% prepayment
- • Established customers: 30% deposit, 70% before shipping
- • Large orders: 50% deposit, 50% against B/L copy
- • Long-term partners: Net 30 days (approved credit)
Payment Methods:
- • T/T Wire Transfer: Most common
- • L/C (Letter of Credit): Large orders
- • PayPal: Small orders under $3,000
- • Western Union: Urgent payments
Credit Applications: Qualified companies can apply for credit terms after 3 successful transactions. Trade references and financial statements may be required.
Do you offer technical support and engineering consultation?
Yes, our experienced engineering team provides comprehensive technical support:
Design for Manufacturing (DFM)
Review your designs for manufacturability, cost optimization, and quality improvements. Suggest alternative approaches to reduce complexity and costs.
Material Selection
Help choose the optimal alloy for your application considering strength, corrosion resistance, machinability, and cost factors.
Process Optimization
Recommend manufacturing processes, surface treatments, and quality control methods to meet your specifications and budget.
Problem Solving
Troubleshoot manufacturing issues, quality concerns, and provide solutions based on our 20+ years of experience.
Contact Methods: Email technical questions to our engineering team, schedule video calls for complex projects, or visit our facility for in-person consultations.
Still Have Questions?
Our technical team is ready to help with your specific requirements. Get personalized answers and expert recommendations.
Business Hours: Monday - Friday: 8:00 - 18:00 | Saturday: 9:00 - 17:00 (GMT+8)
Response time: Within 2 hours during business hours | Same-day quotes for standard requests