Cost-benefit analysis of galvalume (GL) and galvanized steel (GI) sheets in the production of color steel roof
release time：
2025-08-29 17:58
Material selection between galvalume (GL) and galvanized steel (GI) directly impacts color steel tile project economics. This 2025 analysis evaluates key factors influencing production costs and long-term value, providing data-driven recommendations for manufacturers.
Comparative Cost Breakdown
1、Material Economics
●GL's 55% Al-Zn alloy coating maintains a 15-25% price premium over GI (August 2025 zinc spot: $3,050/ton)
●Thinner GL coatings (20-25μm vs. GI's 80-100μm) reduce material waste by 12-18%
2、Production Efficiency
●GL's 2,000+ salt spray hours cut painting cycles by 30% (ASTM B117 standards)
●Energy savings: 8-12% lower processing temperatures compared to GI
3、Lifecycle Savings
●40% lower maintenance costs for GL in coastal projects (30+ year lifespan vs. GI's 15-20)
●GI recoating costs: $1.2-$1.8/m² every 5-8 years
Strategic Implementation
●High-Durability Projects: GL delivers 25% lower lifecycle costs despite higher initial investment
●Budget Solutions: GI remains viable for inland applications with <15 year lifespans
●Hybrid Approach: GL roofs (85% of total surface) with GI walls optimize cost-performance
While GL requires greater upfront investment, its corrosion resistance and operational efficiency provide superior long-term value. Producers should consider environmental exposure, project duration, and budget constraints when selecting materials for color steel tile manufacturing.
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