Mingtai 5754 aluminum plate strip for GIS shell stamping

Mingtai 5754 Aluminum Plate Strip for GIS Shell Stamping: High-Performance Material for High-Voltage Switchgear Enclosures

Gas Insulated Switchgear (GIS) is a core component of ultra-high voltage power transmission and distribution systems, and its shell (tank body) requires materials with superior formability, high corrosion resistance, excellent airtightness, and reliable weldability to withstand high-pressure gas insulation and complex stamping processes. Mingtai Aluminum (stock code: 601677), a leading Chinese aluminum processing enterprise with 27 years of expertise, specializes in producing 5754 aluminum plate strip tailored for GIS shell stamping. As a typical Al-Mg alloy (Mg content: 2.6-3.6%), 5754 aluminum plate strip perfectly meets the stringent requirements of GIS shell manufacturing, serving as the preferred material for high-voltage switchgear enclosures globally.

1. Core Advantages of Mingtai 5754 Aluminum Plate Strip for GIS Shell Stamping

Mingtai’s 5754 aluminum plate strip is engineered to address the key challenges of GIS shell stamping and operation, offering six critical performance benefits:

(1) Exceptional Stamping Formability for Complex GIS Shell Structures

GIS shells feature irregular curved surfaces and deep-drawn cavities (depth ≥8mm) that demand high ductility. Mingtai’s 5754-O/H22/H24 aluminum plate strip achieves an elongation rate ≥15% and a cup test value ≥7.5mm, enabling cold stamping, deep drawing, and bending without cracking or deformation. Its uniform internal grain structure (controlled via precision annealing) ensures consistent forming performance across the entire plate, reducing scrap rates to below 0.5% during mass production.

(2) Superior Corrosion Resistance for Harsh Operating Environments

GIS switchgear operates in outdoor or industrial environments with high humidity, salt spray, and chemical pollutants. The dense oxide film formed by 5754 aluminum’s magnesium content provides excellent resistance to seawater, industrial atmosphere, and acid-base corrosion—passing 1000-hour salt spray tests (ASTM B117) and maintaining structural integrity for over 30 years in service. This eliminates rust and leakage risks, critical for gas-tight GIS enclosures filled with SF6 insulating gas.

(3) High Airtightness to Ensure Gas Insulation Performance

GIS shells require absolute airtightness to prevent SF6 gas leakage (leakage rate ≤10⁻⁶ mbar·L/s). Mingtai’s 5754 aluminum plate strip features ultra-low porosity (≤1 pore/m², diameter ≤0.03mm) and tight thickness tolerance (±0.02mm), ensuring seamless welding and uniform pressure distribution. After stamping and welding, the shell maintains airtightness under 0.6-0.8MPa internal pressure, complying with IEC 62271-203 GIS standards.

(4) Excellent Weldability for Seamless GIS Shell Assembly

GIS shells are fabricated by welding multiple stamped components (e.g., cylinder bodies, flanges). Mingtai’s 5754 aluminum plate strip exhibits low welding crack sensitivity and high weld strength (weld joint tensile strength ≥165MPa), compatible with MIG/TIG welding and friction stir welding. The weld zone retains 90% of the base metal’s mechanical properties, avoiding structural failure under high pressure.

(5) Lightweight & High Strength for Reduced Installation Costs

With a density of 2.66 g/cm³, 5754 aluminum is 60% lighter than steel while delivering a tensile strength of 165-265MPa—sufficient to withstand the internal pressure of GIS enclosures. This reduces the overall weight of GIS equipment by 40-50%, lowering transportation and on-site installation costs significantly compared to steel alternatives.

(6) Environmental Friendliness & Recyclability

As a non-toxic, recyclable material, 5754 aluminum aligns with global green manufacturing trends. Mingtai produces 5754 plate strip using 30% recycled aluminum, reducing carbon emissions by 18% and complying with EU RoHS and REACH environmental standards.

2. Key Technical Specifications of Mingtai 5754 Aluminum Plate Strip for GIS Shell Stamping

Mingtai offers customized 5754 aluminum plate strip solutions for GIS shell stamping, with core parameters optimized for performance and compatibility:

Additional Critical Parameters

Surface Quality: No cracks, corrosion spots, or nitrate traces; surface roughness Ra ≤0.8μm for uniform coating adhesion.

Dimensional Precision: Flatness ≤1mm/m; edge straightness ≤0.5mm/m (no burrs) to ensure precise stamping die fit.

Chemical Composition (wt%): Si ≤0.40; Cu ≤0.10; Mg 2.6-3.6; Mn ≤0.50; Cr ≤0.30; Fe ≤0.40; Zn ≤0.20; Al (balance).

Cleanliness: Oil content ≤5mg/m²; particle count (≥0.5μm) ≤10 particles/㎡, meeting cleanroom Class 1000 standards for stamping workshops.

3. Compatibility of Mingtai 5754 Aluminum Plate Strip with GIS Shell Stamping Processes

Mingtai’s 5754 aluminum plate strip is optimized for the entire GIS shell manufacturing workflow, from blanking to final assembly:

(1) Cold Stamping & Deep Drawing

Process Adaptability: Ideal for cold stamping (no preheating required) with a stamping speed of 10-15 strokes/min for complex shell components.

Die Compatibility: Compatible with standard steel stamping dies; minimal wear on tools due to aluminum’s low hardness.

(2) Welding & Sealing

Welding Methods: Supports MIG/TIG welding (most common for GIS shells) and friction stir welding for high-strength joints.

Post-Welding Treatment: Annealing at 350-410℃ for 30-120 minutes eliminates welding stress and restores ductility.

(3) Surface Coating

Coating Adhesion: The plate’s smooth surface ensures excellent bonding with anti-corrosion coatings (e.g., epoxy powder) and electrostatic spraying, with coating adhesion grade ≥1 (GB/T 9286).

4. Mingtai’s Manufacturing & Quality Assurance for 5754 Aluminum Plate Strip

Mingtai’s state-of-the-art production facilities and strict quality control ensure consistent performance of 5754 aluminum plate strip for GIS shell stamping:

(1) Advanced Production Lines for Precision

Equipped with CVC 6-high cold rolling mills and precision annealing furnaces, Mingtai achieves uniform thickness tolerance (±0.02mm) and grain structure control.

The Class 1000 clean production workshop prevents surface contamination during processing, critical for high-precision stamping.

Annual production capacity of 5754 aluminum plate strip exceeds 80,000 tons, supporting large-scale orders for GIS manufacturers.

(2) Rigorous Quality Testing for GIS Standards

Mingtai’s CNAS-accredited testing center conducts 100% inspection of each batch, including:

Chemical composition analysis (ICP-MS) to ensure Mg content is within 2.6-3.6%.

Mechanical property testing (tensile, elongation, hardness) to verify stamping performance.

Airtightness and porosity testing to meet GIS shell gas-tight requirements.

Corrosion resistance testing (salt spray, acid immersion) to validate long-term durability.

Each batch is accompanied by a Mill Test Certificate (MTC) for full traceability.

(3) Customization & Fast Delivery

Customization: Supports tailored thickness (0.8-20mm), width (800-2600mm), and temper (O/H22/H24) to match specific GIS shell designs.

Lead Time: In-stock standard sizes ship within 3 days; custom orders are delivered in 15-30 days (MOQ: 1 ton).

Global Logistics: Partnered with MAERSK and COSCO for international delivery, with 20-30 day lead times to major ports (Rotterdam, Houston, Singapore).

5. Application Cases of Mingtai 5754 Aluminum Plate Strip in GIS Industry

Mingtai’s 5754 aluminum plate strip has been widely adopted by leading GIS manufacturers worldwide:

Domestic Applications: Supplied to China’s top high-voltage equipment enterprises (e.g., XJ Electric, Pinggao Group) for 110kV, 220kV, and 500kV GIS shell stamping, used in national power grid projects across China.

International Applications: Exported to Siemens, ABB, and Schneider for European and Southeast Asian GIS projects, withstanding tropical high-humidity and coastal salt-spray environments.

Customer Feedback: Achieves a 99.8% on-time delivery rate and a product qualification rate of 99.9%, earning the title of “Strategic Supplier” from key GIS manufacturers.

6. Why Mingtai 5754 Aluminum Plate Strip Outperforms Alternatives for GIS Shells

Compared to other materials (e.g., 5052 aluminum, steel, 6061 aluminum), Mingtai’s 5754 aluminum plate strip offers distinct advantages:

Better Formability than 5052 Aluminum: 5052 aluminum has lower elongation (≥12%) and is unsuitable for deep-drawn GIS shells; 5754’s higher ductility enables complex shaping.

Lighter & More Corrosion-Resistant than Steel: Steel is heavy (increasing GIS installation costs) and prone to rust; 5754 aluminum reduces weight by 60% and eliminates corrosion risks.

Superior Weldability than 6061 Aluminum: 6061 aluminum (Al-Mg-Si alloy) has high welding crack sensitivity; 5754 aluminum’s Al-Mg composition ensures crack-free welding for gas-tight GIS enclosures.

Contact Mingtai for 5754 Aluminum Plate Strip for GIS Shell Stamping

If you are a GIS manufacturer or high-voltage equipment supplier seeking a reliable 5754 aluminum plate strip for shell stamping, Mingtai offers free sample testing and technical support:

Sales Hotline: +86-17760728273 (WhatsApp/WeChat available)

Email: sales@mingtai-al.com

Official Website: www.mingtaialuminum.com

Domestic Service: 0371-67898720 (China)

Mingtai Aluminum is committed to providing high-performance 5754 aluminum plate strip solutions for GIS shell stamping, supporting the global development of high-voltage power transmission and distribution systems with quality and innovation!