China Casting Lead Time Explained: What Affects Your Delivery Schedule
You placed an order. When should you actually expect delivery? The answer is more complex than "4 weeks." Here's a complete breakdown of what's really happening in that foundry, and how to plan your supply chain accordingly.
Lead Time Breakdown by Process
| Process | New Tooling | Repeat Order | Expedited |
|---|---|---|---|
| Green sand casting | 2–4 weeks tooling + 1–3 weeks production | 1–3 weeks | Possible (extra cost) |
| Resin/shell sand | 3–6 weeks tooling + 2–4 weeks production | 2–3 weeks | Limited |
| Investment (soft tool) | 2–3 weeks tooling + 3–5 weeks production | 3–4 weeks | Marginal |
| Investment (prod. tool) | 4–8 weeks tooling + 4–8 weeks production | 3–5 weeks | Possible |
| HPDC (Aluminum) | 8–16 weeks tooling + 3–6 weeks production | 2–4 weeks | Difficult |
The Hidden Timeline: What Foundries Don't Tell You
A "4-week lead time" often means: 2 weeks in queue, 1 week actual production, 1 week in QC inspection. Real capacity is often 50–70% of stated capability.
Key Variables That Affect Your Actual Lead Time
1. Foundry Capacity
Q3 (July–September) and Q4 (October–December) are peak seasons — foundries are busy and lead times extend. Q1 (January–March) post-CNYP is slow. Plan accordingly.
2. Heat Treatment
Heat treatment is often a bottleneck — especially for large parts or specialized grades (stainless, alloy steel). Heat treatment can add 5–15 days to your lead time. Ask the foundry if they have in-house heat treatment.
3. Inspection and Testing Queue
CMM inspection, NDT (X-ray, UT, PT), and mechanical testing are often batched — you may wait for enough parts to fill a CMM session or inspection queue.
4. Material Availability
Specialty alloys (stainless, tool steel, Hastelloy) may require the foundry to source specific raw materials, adding 1–2 weeks.
5. Chinese Holidays
| Holiday | Dates | Production Impact |
|---|---|---|
| Chinese New Year | Late January–Mid February | Most foundries closed 2–4 weeks |
| National Day / Golden Week | October 1–7 | Most foundries closed 1–2 weeks |
| Mid-Autumn Festival | Mid September | Most foundries closed 1–3 days |
| Qingming Festival | Early April | Most foundries closed 1–3 days |
How to Plan Your Supply Chain
- Buffer time: Always add 20–30% to the foundry's stated lead time
- Golden Week avoidance: Don't place orders in late September for delivery before November
- CNY planning: Last order before Chinese New Year: mid-December. Next shipment: mid-March minimum
- Stock buffer: For critical parts, maintain 4–6 weeks of safety stock at your warehouse
- Forecast sharing: Share 6-month rolling forecast with foundry at start of year — they can plan capacity
- Expedite options: Ask about express services (dedicated furnace run): typically 20–40% premium for 30–50% lead time reduction
Frequently Asked Questions
What is a realistic lead time for casting from China?
Standard: sand casting (2–5 weeks after tooling), investment casting (4–8 weeks), shell mold (3–6 weeks), die casting (8–16 weeks including tooling). Repeat orders with existing tooling: 1–3 weeks production + logistics.
When should I avoid placing orders?
Avoid placing orders in: (1) Late September (Golden Week shutdown), (2) Mid-December to mid-March (CNY shutdown). Place orders in November–December for delivery before Chinese New Year, or in March–April after the holiday.
Need Help Planning Your China Casting Supply Chain?
We help buyers plan production schedules, manage lead times, and maintain safety stock for critical casting programs. Get in touch to discuss your supply chain needs.
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