Beyond Steel: Why OEMs are Accelerating the Switch to Aluminum Forging in 2025

Across automotive, aerospace, and industrial machinery, OEMs are reassessing one of the most fundamental design choices: which material and process to use for critical structural parts. Steel is still important, but the pressure to reduce weight, extend EV range, and meet aggressive ESG targets is pushing engineering teams to look harder at forged aluminum components instead of traditional steel forgings and castings.

In 2025, this is no longer a niche decision. Lightweight aluminum alloy forging and machining is becoming a mainstream strategy for suspensions, chassis parts, powertrain housings, aerospace fittings, and high-performance industrial hardware. Market studies now project mid-single to high-single digit annual growth for the global aluminum forging market through 2030, supported by EV adoption and lightweighting in conventional vehicles.

For procurement leaders and engineers, the challenge is to understand how forged aluminum compares with steel and aluminum casting, what the ESG implications are, and how to select reliable, integrated suppliers in a tightening global supply chain.

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Why Lightweight Forged Aluminum Matters in the EV Era

The density gap and range impact

Aluminum has roughly one-third the density of steel, which means that like-for-like parts can be radically lighter when designs are optimized for forged aluminum. In an internal combustion engine vehicle this supports better fuel economy; in an EV, weight reduction directly affects battery size, range, and total cost of ownership. Elka Mehr Kimiya

Because EV battery packs can weigh hundreds of kilograms, every kilogram removed from suspension knuckles, control arms, crossmembers, steering components, motor housings, and brackets helps extend range and reduce brake, tire, and bearing wear over the vehicle’s life. OEMs are also learning that the value of these savings often exceeds the initial material cost premium of high-grade forged aluminum.

Lifecycle economics for purchasing teams

From a sourcing and cost perspective, the relevant metric is shifting from price per kilogram to cost per kilometer or per operating hour. When the mass removed by forged aluminum extends range, enables a smaller battery, or reduces maintenance, the ROI over the product lifecycle can be compelling. Recent research on automotive lightweighting confirms that mass reduction is one of the most effective levers to improve energy efficiency in modern vehicles. Science Direct

In parallel, aluminum forging demand is rising with EV and hybrid production volumes. Several independent market reports now show aluminum forging growing significantly faster than mature metalworking segments, with long-term CAGR estimates in the 6–7% range through 2030. Grand View Research

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Forged Aluminum vs Casting and Steel: Structural Integrity and Grain Flow

Lightweighting only works if safety and durability are maintained. That is why forging, not casting, is the preferred aluminum process for critical components such as steering knuckles, suspension arms, aerospace fittings, and high-pressure industrial parts.

Why aluminum forging outperforms casting

In aluminum casting, molten metal fills a mold and solidifies. This process is flexible but can suffer from internal porosity and non-uniform microstructure, especially in thick or highly stressed regions. By contrast, forging starts from a solid billet that is compressed and plastically deformed into shape. The deformation consolidates the material and aligns the grain structure with the part geometry, which significantly improves fatigue performance and impact resistance.

A simplified comparison is:

Property	Forged Aluminum	Aluminum Casting	Typical Steel
Internal porosity	Very low, near fully dense	Higher risk of shrinkage and gas porosity	Low
Grain structure	Directional grain flow following the part	Random, equiaxed grains	Uniform, but heavier
Fatigue performance	Excellent for cyclic and shock loading	Weaker under repeated loads	Good, with higher weight penalty
Mass for equivalent load	Lowest at equal design targets	Intermediate	Highest

In aerospace and aviation, forged aluminum has long been used for landing gear, aircraft wheels, and structural connectors where high strength and low weight are both essential, illustrating the performance headroom available when forging is combined with appropriate alloy selection and heat treatment.

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From Near-Net Shape to Micron-Level Tolerances: The Role of Precision Machining

The value of aluminum forging is fully realized only when it is tightly integrated with precision machining.

Near-net shape as a process strategy

Modern closed-die forging allows parts to be produced in a near-net shape, meaning the geometry after forging is already close to the final part. CNC machining then removes only a thin envelope of material to achieve final dimensions, tolerances, and interface features. This combination supports:

• Lower material waste compared with machining from solid bar or plate

• Shorter cycle times on CNC machines

• More stable machining performance due to consistent, dense microstructure

• The ability to hit tight tolerances down to the micron level for mating surfaces, bores, and sealing features

Integrated forging and machining is now a core capability of many leading suppliers. For example:

• Al Forge Tech specializes in aluminum alloy forging combined with precision CNC machining for automotive, aerospace, medical, and industrial hardware components, positioning itself as a B2B partner for forged and machined aluminum parts.

• Tung Shuhn Precision Industry provides aluminum forging together with CNC machining and other processes for high-strength parts in aerospace and EV applications, offering a single flow from forging to finished components.

Suppliers that design forgings with machining in mind can optimize stock allowance, fixturing surfaces, and datum structures to reduce programming complexity and lead time for OEMs.

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ESG Pressures, Green Aluminum, and Lifecycle Emissions

Recycling and energy savings

Aluminum’s sustainability profile is a key reason why OEMs are willing to pay a modest premium for high-quality forged parts. Aluminum can be recycled indefinitely without loss of properties, and recycling saves about 95% of the energy required for primary production, reducing greenhouse gas emissions by a similar percentage.

This matters for Scope 3 emissions, where the carbon footprint of materials and components in the supply chain is increasingly scrutinized. Industry initiatives around “low-carbon” or “green” aluminum typically define thresholds for CO₂ per tonne of metal, encouraging the use of renewable energy, efficient smelting technologies, and high scrap content. International Aluminium

Recent collaborations between automakers and aluminum producers, such as the use of low-carbon aluminum in EV body structures to cut lifecycle emissions, show how material choice has become a strategic lever for OEM climate commitments. Reuters

What procurement teams should ask for

To align aluminum forging programs with ESG objectives, buyers increasingly request:

• Documented recycled content and energy mix for forged stock

• Third-party verified carbon footprints for alloys and processes

• Evidence of continuous improvement in energy efficiency and scrap reduction

Suppliers with transparent data on material sourcing, recycling rates, and process energy often become preferred partners in framework agreements.

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Supply Chain Resilience and the Global Supplier Landscape

The disruptions of recent years have shifted OEM thinking from “just-in-time” to “just-in-case,” especially for safety-critical forged parts. Vendor consolidation, dual-sourcing strategies, and preference for integrated forging-plus-machining partners are now common.

Trends in vendor integration

Many leading aluminum forging suppliers are investing in vertical integration, combining metallurgy, forging, heat treatment, CNC machining, and often assembly. Examples include:

• Aluminum Precision Products (APP), based in the United States, provides aluminum and titanium forgings along with machining and assembly. APP positions itself as a fully integrated manufacturer that supports customers from engineering and tooling through forging and final machining, especially in aerospace, defense, and automotive markets.

• Anchor Harvey focuses on closed-die aluminum forging and has recently integrated multiple precision machining businesses. This combination gives OEMs access to domestically sourced forged aluminum components and advanced CNC machining under one roof, which simplifies logistics and quality management for high-volume programs.

• AESA (Aleaciones Estampadas S.A.) in Europe manufactures forged light-metal components including aluminum, supported by CNC machining centers with up to five axes. AESA emphasizes its ability to deliver forged and machined parts for automotive, rail, and mobility sectors, handling both forging and machining in-house.

• Tung Shuhn Precision Industry, mentioned earlier, illustrates how regional suppliers in Asia combine aluminum forging, friction stir welding, casting, and high-precision machining to serve aerospace and EV customers that need reliable, localized production capacity.

• Al Forge Tech, also in Asia, focuses specifically on aluminum alloy forging and machining, supplying forgings for automotive, motorcycle, medical, sporting, and industrial applications. Its portfolio shows how specialized forging and CNC machining capabilities can be tailored for high-mix, high-precision product lines.

These examples are not an exhaustive list of qualified suppliers, but they illustrate a broader pattern: OEMs increasingly prefer partners that can design the forging, perform simulations, manage heat treatment, execute multi-axis machining, and ship a ready-to-assemble part.

Risk management and regional strategies

From a risk standpoint, integrated aluminum forging partners support:

• Fewer hand-offs between independent forge shops, machine shops, and surface finishers

• Unified accountability for material integrity and dimensional accuracy

• Stronger leverage in raw material procurement and alloy availability

• More predictable lead times, which is crucial when EV platforms ramp quickly

OEMs often combine global and regional suppliers to balance cost, logistics, and geopolitical risk, while still enforcing common quality and process standards across the forging supply base.

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Key Actions for OEM Decision-Makers in 2025

For engineering, sourcing, and operations teams, several practical steps can help future-proof aluminum forging strategies:

1. Prioritize component families with the highest weight and fatigue loading. Steering, suspension, subframes, and motor housings are typical early candidates for aluminum forging conversion.

2. Evaluate total lifecycle value, not just piece price. Include energy savings, range extension, maintenance reductions, and potential battery downsizing in business cases.

3. Specify forging plus machining requirements early. Work with suppliers that can support near-net shape design, heat treatment, and CNC process development as part of co-engineering.

4. Align material strategies with ESG targets. Request data on recycled content, carbon intensity, and energy sources for forged aluminum, and connect this data to Scope 3 reporting frameworks.

5. Build a resilient, diversified supplier portfolio. Combine large global players like APP, Anchor Harvey, and AESA with regional specialists such as Tung Shuhn Precision and Al Forge Tech where appropriate, while maintaining harmonized specifications and validation protocols.

By treating aluminum alloy forging and machining as a strategic, cross-functional topic rather than a commodity purchase, OEMs can capture both performance and sustainability advantages in the decade ahead.