Die Cavity: Pressure Resistance 50-150 MPa

Component Specifications

Definition

The die cavity is the negative impression or hollow space within a die casting die that defines the external geometry and surface features of the cast part. It receives molten metal under high pressure and solidifies it into the desired component shape with dimensional accuracy and surface finish.

Working Principle

The die cavity operates by containing and shaping molten metal injected under high pressure during the die casting process. As the metal solidifies within the cavity's precisely machined contours, it takes the inverse shape of the cavity, forming the final part geometry. The cavity must withstand thermal cycling, mechanical stress, and chemical interaction with molten alloys.

Materials

Typically made from hot-work tool steels (H13, H11), maraging steels, or premium alloys with high thermal fatigue resistance, hardness (44-48 HRC), and thermal conductivity. Surface treatments include nitriding, PVD coatings, or chrome plating for wear resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Finish	Ra 0.4-1.6μm
Cavity Tolerance	±0.05-0.1mm
Pressure Resistance	50-150 MPa
Operating Temperature	150-300°C
Thermal Expansion Coefficient	11-13×10⁻⁶/°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 8062, DIN 16749, ASTM A681

Parent Products

This component is used in the following industrial products

Die Casting Die

A precision tool used in high-pressure die casting to shape molten metal into complex components.

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Engineering Analysis

Risks & Mitigation

Thermal fatigue cracking
Soldering (metal adhesion)
Erosion from high-velocity metal flow
Dimensional inaccuracy from wear
Surface defects transfer to cast parts

FMEA Triads

Trigger: Insufficient cooling channels or improper thermal management
Failure: Thermal stress cracks reducing cavity life
Mitigation: Optimize cooling circuit design, use conformal cooling, implement proper die temperature control

Trigger: Incompatible die material for specific alloy being cast
Failure: Premature erosion or soldering
Mitigation: Select appropriate tool steel grade and surface coatings for the casting alloy

Trigger: Improper venting design
Failure: Gas entrapment causing porosity in cast parts
Mitigation: Design adequate venting channels and overflow systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 8062 GD&T standards for cast dimensions

Test Method

CMM inspection, surface roughness testing, hardness testing (Rockwell C), dye penetrant testing for cracks

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Die Cavity

Manufacturer profiles associated with Die Cavity.

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Frequently Asked Questions

What is the difference between die cavity and core in die casting?

The die cavity forms the external surfaces of the cast part, while cores create internal features or undercuts. Cavities are typically stationary half features, while cores may be movable.

How long does a die cavity typically last?

With proper maintenance, a quality die cavity can produce 100,000-500,000 shots depending on alloy, design complexity, and operating conditions before requiring significant refurbishment.

What causes die cavity erosion?

Primary causes include thermal fatigue from repeated heating/cooling cycles, chemical reaction with molten alloys, mechanical wear from high-pressure injection, and improper venting causing trapped gas erosion.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Die Cavity