1. The Trap of Comparing "Per-Piece" Prices
Most RFQs start with one question: "How much per part?"
But carbon fiber is not a commodity like screws or standard extrusions. Two quotes at $12/part can deliver completely different total costs over 12 months.
What the unit price usually excludes:
Tooling / Mold cost (and whether it's amortized or paid upfront)
NRE (Non-Recurring Engineering) for drawings, layup design, and first articles
Scrap rate on complex geometries
Rework loops caused by missing tolerances or process specs
2. Tooling: The Silent Budget Killer
Carbon fiber tooling is often steel, aluminum, or hybrid.
A proper mold can cost $800–$8,000+, depending on part size, cavity count, and surface finish.
|
Tool Type |
Cost Range |
Best For |
|---|---|---|
|
Aluminum mold |
$ |
Prototypes, low volume |
|
Steel mold |
$$$ |
High volume, tight tolerance |
|
Hybrid (steel + aluminum) |
$$ |
Balanced cost/durability |
Key question to ask your supplier:
"Is tooling amortized across POs, or charged per batch?"
If it's per batch, your effective unit cost can double without warning.
3. Scrap, Rework, and the "First Article Trap"
Carbon fiber rejects are expensive because:
Material cost is high
Labor is manual and skill-dependent
Cure cycles take hours
A part that passes first article but drifts in Batch 4 creates:
Line-down costs for your assembly
Emergency air freight to replace rejected parts
Engineer time spent re-clarifying specs
What prevents this:
Written ply schedule + resin system spec
Agreed tolerance stack-up (not just "±0.1mm" on one dimension)
Process capability review before mass production
4. Logistics & Duty: The Forgotten 15–30%
For buyers in Southeast Asia, North America, and the EU:
Carbon fiber sheets/tubes may fall under HS 6815 / 3916 (varies by region)
Duties range from 0% to 8%+, depending on country of origin
Incorrect classification = customs delays + penalties
Pro tip: Ask your supplier for a commercial invoice template with correct HS code before quoting.
5. The Right Way to Compare Carbon Fiber Quotes
Instead of asking "Who's cheapest?", ask:
|
Question |
Why It Matters |
|---|---|
|
What resin system is quoted? |
Epoxy vs BMI vs Phenolic = different cost & performance |
|
Is tooling amortized? |
Changes true unit cost |
|
What's the scrap/rework allowance? |
Affects delivery reliability |
|
What's the cure process? |
Oven vs autoclave = different consistency |
|
What's the on-time delivery rate for similar parts? |
Past performance predicts future risk |
