Integrated casting-forging is a pressure-assisted aluminum forming route that combines near-net-shape casting with controlled forming during solidification. It may be considered when a component needs more geometric freedom than conventional forging can readily provide, while also requiring closer control of internal quality than a conventional casting route may offer.

At Beigong, the integrated casting-forging process is evaluated according to the part drawing, alloy, load path, wall-thickness changes, heat treatment, machining requirements, production volume and validation standard. The process name itself does not determine whether a component is suitable.

Why Was Integrated Casting-Forging Developed?

Aluminum structural parts often involve a compromise between geometry, mechanical requirements and manufacturing feasibility.

Casting can form ribs, bosses, curved load paths and integrated mounting features efficiently. However, internal defects and local variations require careful control when a component is exposed to cyclic loading, concentrated forces or demanding safety requirements.

Forging is widely used for load-bearing aluminum parts. However, complex cavities, integrated features and large changes in section thickness can increase tooling difficulty and subsequent machining requirements.

Integrated casting-forging was developed for applications between these two routes. It uses a shaped mold to form the component and controlled pressure to support the material during forming and solidification.

The intended result is a near-net-shape aluminum blank with controlled critical regions and less material removal than a part machined completely from plate or billet.

This does not mean that integrated casting-forging should replace casting or forging in every project. It is an additional manufacturing option for components whose geometry and performance requirements do not fit comfortably within a conventional route.

How Does the Process Work?

At a public engineering level, integrated casting-forging can be understood through four general stages.

1. Material and part preparation

The alloy, initial geometry, machining allowance and inspection requirements are defined according to the product drawing and application.

2. Mold filling

Molten aluminum is introduced into a closed forming system developed around the component geometry.

3. Pressure-assisted forming and solidification

Controlled pressure is applied according to the structural and quality requirements of the part.

4. Post-forming operations

The formed blank is removed and inspected. Heat treatment, CNC machining and surface finishing are performed when required by the final product.

This explanation describes the general process principle, not a production recipe. Machine configuration, mold construction, filling design, pressure strategy, thermal conditions and process windows are developed for each component and remain part of the manufacturing know-how.

What Engineering Problem Does Pressure Address?

The most demanding areas of an aluminum structural part are not always its largest visible surfaces.

Critical areas may include:

• bearing seats;

• mounting bosses;

• transitions between thick and thin sections;

• machining interfaces;

• regions where the load changes direction;

• areas exposed to repeated or concentrated loading.

During process development, engineers examine how these areas fill and solidify and whether they may be affected by shrinkage, porosity, oxide films or insufficient local feeding.

Pressure-assisted forming provides an additional method for controlling the material during this stage. However, the result cannot be judged from appearance alone.

Depending on the part and its application, validation may include dimensional inspection, X-ray examination, metallography, tensile testing, fatigue testing, pressure testing or component bench testing.

The inspection plan should be defined according to the intended use of the component rather than copied from an unrelated part.

Which Aluminum Parts May Be Suitable?

Integrated casting-forging may be worth evaluating when a component has several of the following characteristics:

• complex load-bearing geometry;

• ribs, bosses or mounting features that would otherwise require several operations;

• critical regions requiring closer internal-quality control;

• substantial material removal in the current CNC route;

• heat-treatment or controlled surface-finishing requirements;

• geometry that is difficult to produce through conventional forging;

• an opportunity to combine several functions in one aluminum blank.

Representative custom aluminum structural components may include steering and suspension parts, wheel-related parts, E-bike motor mounts, structural brackets, housings and industrial equipment components.

Every component still requires an independent feasibility review. A part with simple geometry, limited structural requirements or an established economical production route may gain little from changing processes.

Technical feasibility and commercial suitability should therefore be evaluated separately.

Which Aluminum Alloys Can Be Considered?

Alloy feasibility depends on more than the grade shown on a drawing.

Fluidity, solidification behavior, cracking tendency, heat-treatment response, final section thickness, machining requirements and surface condition can all influence the manufacturing route.

Beigong’s development records include casting alloys and selected wrought aluminum alloys. Examples include:

• A356.2;

• 6061;

• 7075;

• 205 (AM5).

These materials demonstrate development experience. They do not mean that every geometry can be produced successfully in every listed alloy.

For 6061 and other wrought aluminum alloys, initial trials may be required to evaluate filling behavior, cracking risk, dimensional stability and heat-treatment response.

For 205 (AM5) structural parts, the component geometry, material condition, sampling location and validation method should be agreed before mechanical test results are interpreted.

A 205 (AM5) Aluminum Structural-Part Example

Beigong has produced anonymized automotive structural-part samples using 205 (AM5) aluminum, including steering-knuckle, control-arm and wheel-related samples.

The development work included forming, heat treatment, machining and component-specific inspection. Customer names and identifying project information are not disclosed.

The purpose of this example is not to present a universal strength value. It demonstrates how manufacturing feasibility is evaluated through an actual component rather than through a material datasheet alone.

For a steering-knuckle-type component, engineers may need to review:

• bearing and mounting positions;

• load transfer between arms and bosses;

• changes in section thickness;

• machining datums and final tolerances;

• inspection locations;

• fatigue requirements;

• component-level validation requirements.

Mechanical-property values obtained from development samples represent the tested samples under their specific material condition, sampling position and test method. They should not be interpreted as guaranteed values for a different component.

What Should an OEM Provide for a Feasibility Review?

A preliminary review does not require a completed tooling specification. The following information is generally sufficient to begin an engineering discussion:

• a 3D model and dimensioned drawing;

• the target alloy and acceptable alternatives;

• estimated annual demand;

• expected program duration;

• load cases and fatigue requirements;

• critical areas and allowable defect limits;

• heat-treatment requirements;

• surface-treatment requirements;

• machining datums and tolerances;

• inspection and validation standards;

• limitations of the current manufacturing route.

With this information, the engineering team can assess whether integrated casting-forging may be relevant, which questions require simulation or trials and what evidence will be needed before production approval.

If the project contains sensitive information, the drawing and technical documents can be reviewed under an appropriate confidentiality arrangement.

What Does Beigong Provide?

Shenzhen Beigong Industrial Co., Ltd. develops integrated casting-forging equipment, molds, forming processes and aluminum structural components.

Its technical development is supported by 40 patents associated with equipment and forming-system development.

For a customer project, the practical work involves coordinating:

• component geometry;

• aluminum material;

• equipment and tooling;

• heat treatment;

• CNC machining;

• inspection;

• prototype validation.

The appropriate manufacturing route is determined according to the requirements of the individual component. Detailed equipment configurations and process parameters are reviewed under suitable confidentiality arrangements.

Frequently Asked Questions

Is Integrated Casting-Forging the Same as Conventional Forging?

No. Conventional forging shapes a solid billet or preform. Integrated casting-forging begins with mold filling and applies controlled pressure while the material forms and solidifies.

The material state, equipment and process design are different.

Is Integrated Casting-Forging a Type of Die Casting?

It uses molten aluminum and a mold, but its forming objective and pressure application differ from conventional high-pressure die casting.

A useful comparison should consider the material state, pressure action, heat-treatment requirements, component geometry and validation target.

Can Integrated Casting-Forging Eliminate Every Casting Defect?

No manufacturing process removes every production risk.

Part design, alloy quality, melt handling, tooling condition, process control and operator consistency still matter. Inspection and testing remain necessary for structural components.

Can 6061 Aluminum Be Used?

6061 can be evaluated, but it is a wrought aluminum alloy with a more demanding casting window than common casting alloys.

Feasibility depends on component geometry, thermal control, cracking risk, heat treatment and required properties. Trials may be necessary before a production decision is made.

Can 205 (AM5) Be Used for Automotive Structural Parts?

205 (AM5) can be evaluated for automotive structural components, but the alloy designation does not determine suitability by itself.

The drawing, load conditions, section thickness, heat treatment, machining plan, inspection method and component-level validation requirements must be reviewed together.

How Do I Know Whether My Part Is Suitable?

The practical approach is to review the drawing, alloy, load conditions, annual demand, heat treatment, machining requirements and validation standard together.

A feasibility review should identify both the potential manufacturing advantages and the unresolved engineering risks.

Request an Integrated Casting-Forging Feasibility Review

If an aluminum component is limited by casting quality, forging geometry or extensive CNC material removal, Beigong can review the drawing and technical requirements.

The initial review can help determine:

• whether integrated casting-forging is relevant;

• what additional information is required;

• which areas require further engineering evaluation;

• what prototype and validation steps should be considered.

Send your drawing for an engineering feasibility review.