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Built on Stability: High-Performance
Castings for Heavy Machinery

KBR designs and manufactures the structural cores—bases, frames, and housings—for construction and engineering machinery. We deliver the strength, precision, and durability required to perform under the most demanding conditions.

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Home > Application > Construction & Engineering Machinery

Challenges

The Unyielding Demands of Construction & Engineering Machinery

Construction and engineering machinery operates under the most demanding conditions, where reliability and durability are measured in years of rigorous service. The structural components of earth-moving, lifting, and material-handling equipment are not just metal frameworks; they are the foundation of safety, stability, and performance.

Vibrational & Load Stability

In the field, construction equipment faces constant vibration from uneven terrain, heavy impacts from material handling, and variable loads from changing work conditions. Structural castings must provide exceptional vibration damping, impact resistance, and dimensional stability to ensure consistent performance, operator safety, and extended component life under dynamic stress.

Material Durability & Environmental Resistance

Construction and engineering machinery operates in harsh environments—exposed to moisture, corrosive materials, temperature extremes, and abrasive particles. Structural components must be manufactured with high-strength, corrosion-resistant materials that maintain integrity under prolonged stress. Castings must be free from internal defects and porosity to prevent crack propagation and ensure reliable performance throughout the equipment's service life.

Structural Rigidity & Fatigue Resistance

The immense weight of machinery subsystems combined with repeated loading cycles demands structural components with superior rigidity and exceptional fatigue resistance. This ensures that equipment maintains precise operational alignment, withstands millions of stress cycles without deformation, and delivers consistent performance throughout its operational lifespan.

Process

KBR Construction & Engineering Solution Matrix

Construction & Engineering Machinery Challenges	Required Casting characteristic	KBR's Verifiable Solution & Evidence
Resisting Heavy Load Impact and Vibration	High Impact Resistance and Excellent Vibration Damping Performance	High-strength ductile iron (QT450-12/600-3) and alloy cast iron: Possess good toughness, impact resistance, and vibration damping capabilities, suitable for bases and structural frames subjected to extreme dynamic loads.
Adapting to Harsh Operating Conditions and High Environmental Stress	High Material Density, Fatigue Resistance, and Wear Resistance	High-density alloy cast iron and specialized wear-resistant cast iron: Utilize advanced casting processes and alloy formulations to ensure material structural integrity and performance stability under long-term alternating stresses and abrasive environments.
Ensuring Long-term Stability of Large Structural Components	Low Residual Stress and Excellent Dimensional Stability	Large integrated resin sand casting and heat treatment processes: Capable of producing ultra-heavy structural components (e.g., over 10,000 kg), with residual stress controlled through heat treatment to ensure dimensional stability during long-term use.
Meeting Installation Accuracy Requirements Under High Loads	High Dimensional Accuracy and Machining Consistency	In-house heavy-duty machining centers and 3D inspection systems: Equipped with large gantry mills and multi-axis machining capabilities, achieving key mating surface accuracy within ±0.1mm, supported by full-dimensional verification via 3D scanning.
Ensuring Field Operation Reliability and Traceable Quality	Systematic Quality Assurance and Full-process Testing	ISO 9001:2015 certified system and in-house material laboratory: Provide material mechanical properties testing, metallographic analysis, ultrasonic inspection, and fatigue testing to ensure long-term reliability of products under demanding working conditions.

Quality Control

Qualification Through Verification:
Our Commitment to Quality

In high-stakes manufacturing, trust is earned through proof. Our quality system is not just a certificate on the wall; it is an integrated, data-driven process designed to mitigate risk and ensure absolute conformance to your specifications.Our entire operation is certified to the ISO 9001:2015 standard, ensuring a systematic, repeatable, and documented approach to quality assurance.

Quality Control

Comprehensive In-House
Metrology & Testing

We validate every critical parameter in our dedicated quality lab, providing you with complete transparency and verifiable data.

Spectrometer

To verify the precise chemical composition of every melt, ensuring material properties meet specifications like HT300 or QT450-15.

Tensile Strength & Hardness Testers

To confirm that the final casting possesses the required mechanical properties for strength, durability, and wear resistance.

Ultrasonic Flaw Detector

To perform ultrasonic inspection for castings. This ultrasonic flaw detection inspects the internal structure for subsurface porosity or inclusions, a critical step to prevent outgassing in vacuum components.

Metallographic Microscope

To examine the material's microstructure (e.g., graphite flake size in gray iron or nodularity in ductile iron), which dictates its performance characteristics.

3D Scanner

To perform 3D scanning for castings. This CAD-to-part inspection provides high-precision dimensional verification against the original CAD model, ensuring accuracy and conformance.

Projects

Typical Components forHigh-Performance Equipment

Counterweight casting for forklift trucks:
Can be directly used for assembly and does not require machining.

Process:Resin Sand Casting

Material:HT250 Gray Iron

Weight: 450 kg

As a top-quality HT250 cast component, its design is aimed at achieving maximum durability and rust resistance.

Pump casting:
High-pressure resistant, pore-free pump body

Process:Coated sand process

Material:HT250 Gray Iron

Weight:30 kg

Coated sand process delivers ultra-smooth flow channels and surface finish.

Capabilities

Mastering the Craft : Our Dual Casting Processes

Request Casting Process Solution

Resin Sand Process

Coated Sand Process

Resin Sand Process

For Large-Scale & Heavy-Duty Castings

Our Resin Sand process is ideal for producing large, heavy, and structurally demanding castings. Using robust metal or wood patterns, High-strength sand shell, with a smaller draft angle,24 to 72 hours of insulation time.this process provides a cost-effective solution for low-to-medium volume production runs where structural integrity is paramount.

Key Specifications Table

Casting Weight: 50 kg – 10,000 kg

Best For: Low-to-medium volume (tens to hundreds annually)

Materials: Gray Iron (HT200,HT250,HT300,).Ductile Iron (QT400-QT450-QT500-QT600)

Applications: Machine Tool Bases, Large Housings, Construction Machinery Frames

Coated Sand Process

For High-Precision & High-Volume Components

When precision and surface finish are critical, our Coated Sand process delivers exceptional results. Using high-precision, long-life iron molds (100,000+ uses), By using the core shooter, we can produce more precise sand molds with a smaller draft angle.we achieve accuracy errors within 0.5mm, the surface roughness reaches Ra25.making it perfect for complex parts in high-volume production.

Key Specifications Table

Casting Weight: 5 kg – 1,000 kg

Best For: Hundreds to tens of thousands

Materials: Gray Iron (HT200,HT250,HT300,).Ductile Iron (QT400-QT450-QT500-QT600)

Applications: Valve, Cylinder block, Transmission parts

Trusted by Leading OEMs Worldwide for Gray & Ductile Iron Castings

Talk to us

Let's Build Your Next Great Component

Whether you have a complete CAD model or are in the early stages of design, we can provide expert guidance on material selection, process optimization, and design for manufacturability to ensure your project's success.

Discover Keboer

Built on Stability: High-Performance Castings for Heavy Machinery

Challenges

The Unyielding Demands of Construction & Engineering Machinery

Vibrational & Load Stability

Material Durability & Environmental Resistance

Structural Rigidity & Fatigue Resistance

Process

KBR Construction & Engineering Solution Matrix

Quality Control

Qualification Through Verification: Our Commitment to Quality

Quality Control

Comprehensive In-House Metrology & Testing

Spectrometer

Tensile Strength & Hardness Testers

Ultrasonic Flaw Detector

Metallographic Microscope

3D Scanner

Projects

Typical Components forHigh-Performance Equipment

Counterweight casting for forklift trucks:Can be directly used for assembly and does not require machining.

As a top-quality HT250 cast component, its design is aimed at achieving maximum durability and rust resistance.

Pump casting:High-pressure resistant, pore-free pump body

Coated sand process delivers ultra-smooth flow channels and surface finish.

Capabilities

Mastering the Craft : Our Dual Casting Processes

Resin Sand Process

For Large-Scale & Heavy-Duty Castings

Key Specifications Table

Coated Sand Process

For High-Precision & High-Volume Components

Key Specifications Table

Trusted by Leading OEMs Worldwide for Gray & Ductile Iron Castings

Talk to us

Let's Build Your Next Great Component

Email

Phone / WhatsApp

Shanghai Office

Anhui Factory

Capabilities

VMC Casting Solutions

Application

About Keboer

Resource

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Built on Stability: High-Performance
Castings for Heavy Machinery

Qualification Through Verification:
Our Commitment to Quality

Comprehensive In-House
Metrology & Testing

Counterweight casting for forklift trucks:
Can be directly used for assembly and does not require machining.

Pump casting:
High-pressure resistant, pore-free pump body