* Made from high-quality cast iron.

* Heat-treated for stress relief.

* Available in two accuracy grades: Grade 2 and Grade 3.

* Precision-machined T-slots and cored as-cast slots are provided to facilitate clamping.

* Special sizes are available according to the customer’s specific requirements.

• Supplied as a matched pair.

Place of Origin: Hebei, China

Warranty: 1 year

Customized Support: OEM, ODM, OBM

Brand Name: Storan

Model Number: 2009

Material: Customized

Accuracy: Customized

Operation Mode: Customized

Item Weight: Customized

Capacity: Customized

Material: HT200-300

Specification: Custom

Surface: Flat, T-slots, and cored as-cast slots

Working Surface Hardness: HB160-240

Surface Treatment: Hand-scraped or finish-milling

Foundry Process: Sand casting or centrifugal casting

Molding Type: Resin sand molding

Painting: Primer and face painting

Surface Coating: Pickling oil and plastic-lined or coated with anticorrosion paint

Packaging: Plywood box

Lead Time

Technical Specification of Cast Iron Square Box:

Cast Iron Square Box Material: HT200-HT300 for Wear Resistance

The material of a cast iron square box directly affects its durability and precision—especially in harsh industrial environments. Storan selects HT200-HT300 gray cast iron for its square box solutions. This premium alloy balances hardness, stability, and wear resistance to outperform standard alternatives. The following explains how this material helps your tool withstand rigorous workshop use:

1. Industrial-Grade Hardness for Heavy-Duty Use

HT200-HT300 Cast Iron (160–240HB hardness) is engineered for toughness:

Superior Abrasion Resistance: Its pearlitic microstructure offers 20% better wear resistance than lower-grade irons, helping maintain smooth surfaces (Ra ≤1.6μm) through 10,000+ clamping cycles. This is critical for cast iron square boxes used in milling or drilling, where constant tool contact may damage softer materials.
Heavy Load Support: With 200–300MPa tensile strength, Storan’s square box models support up to 500kg of static loads without deformation—ideal for holding large workpieces during 3D measurement or machine alignment.

2. Thermal Stability for Sustained Accuracy

Temperature fluctuations (10°C–40°C) will not compromise the precision of HT200-HT300:

Dimensional Consistency: Low thermal expansion (11.6×10⁻⁶/°C) maintains ±0.02mm/m straightness over 1000mm, ensuring reliable perpendicularity (90°±5') and parallelism measurements in CMMs or optical comparators.
Stress Relief Treatment: A 550°C anneal reduces 90% of casting stress, helping prevent micro-cracks that may degrade lower-cost models over time.

3. Manufacturing Craftsmanship Enhances Material Performance

Storan’s processes maximize the performance of HT200-HT300:

Resin Sand Casting: Produces uniform wall thickness (15–30mm) and precise T-slots (14–24mm width, ±0.1mm tolerance) for consistent load distribution.
Optional Hand-Scraped Finish: For critical inspections, artisans refine surfaces to 25+ contact points/25x25mm, increasing load-bearing area by 30% and reducing workpiece deflection—achieving Class 0 flatness (≤0.0005mm/m) for aerospace or medical applications.

4. Proven Performance in Demanding Scenarios

Storan’s iron square box solutions excel in environments where precision matters:

Heavy Machinery Inspection: A 300x300x300mm cast iron square box supports 200kg diesel engine components during flatness testing. The HT200’s vibration-dampening characteristics help minimize measurement errors.
CNC Machining Fixturing: HT300’s 240HB hardness resists tool impact and helps keep workpieces aligned within ±0.01mm for complex part geometries during milling operations.

5. Storan’s Material Promise: Durability & Customization

Tailored to Your Needs: Choose HT200 for general use or HT300 for extreme loads, in sizes from 100x100mm bench models to 600x600mm industrial fixtures.
Quality You Can Trust: Each box meets GB/T 4986-2004 and ISO 8512-1 standards, verified by CMM inspection, and backed by a 1-year warranty against material defects.
Long-Term Value: Storan’s HT200-HT300 models last 3x longer than generic boxes, delivering lower total cost of ownership for shops that rely on dependable fixturing tools.

Don’t compromise on material quality for your cast iron square box. Storan’s HT200-HT300 construction combines hardness, thermal stability, and precision manufacturing to help ensure your square box maintains accuracy even in the toughest workshops. From daily fixturing to critical inspections, our material selection is designed to stand the test of time—backed by the expertise of a leading industrial tool manufacturer. Explore our range today and experience the difference premium cast iron makes.

Hand-Scraped Finish: ±5μm Precision of Cast Iron Square Box for Critical Inspections

In precision measurement and fixturing, the surface finish of a cast iron square box can mean the difference between reliable results and costly errors—particularly in industries such as aerospace, medical devices, and automotive manufacturing. Storan raises inspection standards with hand-scraped finishes on its iron square box solutions. This craftsmanship-driven process delivers ±5μm precision that exceeds the performance of machine-ground alternatives. The following highlights how this premium finish transforms ordinary tools into precision instruments:

1. The Art of Hand Scraping: Beyond Machine Grinding

While machine grinding provides acceptable surfaces (Ra ≤1.6μm), critical inspections require microscopic perfection:

Micro-Contact Optimization: Skilled artisans manually scrape each surface to create a grid of 25–30 precision contact points per 25x25mm, increasing load-bearing area by 30%. This reduces workpiece deflection under 200kg+ loads and supports Class 0 flatness tolerances (≤0.0005mm/m)—essential for verifying perpendicularity (90°±5') and parallelism (≤0.01mm/m) in coordinate measuring machines (CMMs).
Imperfection Elimination: Unlike grinders that may leave residual stress or micro vibrations, hand scraping removes these issues, resulting in a surface uniform enough to serve as a reference standard for dimensional metrology labs.

2. Material & Process Synergy for Lasting Precision

Storan’s cast iron square box hand-scraping process starts with HT200-HT300 gray cast iron (180–240HB hardness):

Scrapability Excellence: The fine-grained structure of our cast iron accepts precise blade cuts, enabling artisans to refine surfaces to ±5μm flatness over 300mm lengths—ideal for square box models used in optical comparator setups or gauge block calibration.
Thermal Stability: Combined with a 550°C stress-relief anneal (reducing 90% of casting stress), the hand-scraped finish resists warping in 10°C–40°C environments and helps maintain accuracy for decades of heavy use.

3. Applications Where Every Micron Counts

Storan’s hand-scraped cast iron square box solutions are well-suited to high-stakes applications:

Aerospace Component Inspection: A 400x400x400mm iron square box ensures ≤0.005mm deviation when verifying the perpendicularity of jet engine mounting brackets, which is critical for vibration-free assembly.
Medical Device Manufacturing: For surgical instrument fixturing, the ±5μm precision of hand-scraped surfaces helps ensure consistent drilling angles for orthopedic implants, reducing scrap rates by 20%.
Automotive Quality Control: Used to calibrate robotic arms in transmission assembly, Storan’s boxes maintain parallelism within 0.01mm/m and help prevent costly misalignments in high-volume production.

4. Storan’s Edge: Craftsmanship Meets Engineering

Customization Without Compromise: Choose from standard sizes (100x100mm–600x600mm) or request custom dimensions—each hand-scraped cast iron square box is supported by 3D laser scanning to ensure compliance with GB/T 4986-2004 and ISO 8512-1.
Durability Built In: A 5μm anti-corrosion oil finish protects the surface from coolant and humidity, extending the service life of Storan’s square box models by 2x compared with uncoated competitor options in demanding workshop environments.
Reliability You Can Trust: Backed by a 1-year warranty against surface wear or dimensional drift, our hand-scraped tools provide confidence for inspections where failure is not an option.

When critical inspections require sub-micron precision, rely on Storan’s hand-scraped cast iron square box solutions. More than just tools, they combine artisanal craftsmanship with industrial engineering, designed to meet the exacting standards of modern manufacturing. Explore our range today and discover how ±5μm precision can elevate your quality control, fixturing, and measurement processes—backed by the reliability of a brand that understands the value of perfection.

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