PPAP for Die Casting Buyers - Levels 1-5, Documents & Timeline

PPAP for die casting is the production part approval process used to confirm that a supplier can manufacture parts consistently according to the drawing, specification, material, process flow, and customer requirements. It is common in automotive and other controlled manufacturing programs.

For buyers, PPAP is not only paperwork. It connects tooling, casting, machining, finishing, inspection, packaging, and process control before mass production starts.

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PPAP Levels

Level	What Is Submitted
Level 1	Part Submission Warrant only
Level 2	Warrant plus samples and limited supporting data
Level 3	Warrant, samples, and complete supporting data
Level 4	Warrant and other customer-defined requirements
Level 5	Warrant, samples, and complete data reviewed at supplier location

Level 3 is commonly requested for many production programs, but the customer decides the required level.

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Common PPAP Documents for Die Castings

Document	Purpose
Design record	Confirms drawing and revision
Engineering change documents	Tracks approved changes
Process flow diagram	Shows production route
PFMEA	Reviews process risks
Control plan	Defines inspection and control points
Dimensional results	Confirms part dimensions
Material certificate	Confirms alloy
Initial process study	Shows capability for critical dimensions
MSA or gauge study	Confirms measurement method
Appearance approval	Used when cosmetic surfaces matter
Sample parts	Physical parts from production-intent process
Part Submission Warrant	Summary approval document

Die casting PPAP may also include leak test data, coating reports, machining inspection, and packaging approval.

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Typical Timeline

Stage	Typical Timing
DFM and tooling approval	1-2 weeks
Tool build	4-8 weeks depending on complexity
T0 or first trial samples	1 week after tool trial
Corrections and T1 samples	1-4 weeks
Dimensional and material reports	1-2 weeks
PPAP package preparation	1-2 weeks after stable samples

Actual timing depends on tool complexity, sample results, customer response speed, and whether design changes are needed.

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Buyer Responsibilities

Buyers should provide:

1. Current drawing and 3D model.
2. PPAP level requirement.
3. Critical dimensions and special characteristics.
4. Material and finish specifications.
5. Test requirements.
6. Packaging requirements.
7. Approval workflow and contact person.
8. Required submission date.

Missing requirements cause PPAP delays more often than suppliers expect.

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RFQ Checklist

When requesting a PPAP quote, include:

• PPAP level
• Annual volume
• Required documents
• Sample quantity
• Critical dimensions
• Test and inspection requirements
• Customer-specific forms
• Target approval date

KastMfg supports automotive process controls, inspection documentation, sample approval, and PPAP preparation for qualified programs. Submit drawings and PPAP requirements through the RFQ page.

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FAQ

What is PPAP in die casting?

PPAP is a structured approval process that confirms a die casting supplier can produce parts consistently according to drawing, material, process, and customer requirements.

Which PPAP level is most common?

Level 3 is commonly used because it includes samples and complete supporting documentation, but the customer defines the required level.

Does PPAP happen before or after tooling?

PPAP happens after production-intent samples are made, but requirements should be agreed before tooling starts.

What causes PPAP delays?

Common delays include drawing changes, unstable dimensions, missing critical characteristics, unclear testing requirements, and customer-specific documents provided too late.