Compare G60, G90 and G115 galvanized steel by zinc coating weight, thickness, corrosion resistance, applications, cost and ASTM specification requirements.
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Explore the differences between PPGI and PPGL coils, including coating, corrosion resistance, applications, and cost. Learn how to choose the right prepainted steel coil for roofing, cladding, appliances, and long-term projects with Hengze Steel.
Learn what steel grade means, how steel grades are classified, major standards, and how to choose the right steel grade for construction and manufacturing.
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Steel Coil Frequently Asked Questions
Quick answers to common questions about steel products.
PPGI normally uses a galvanized steel substrate, while PPGL normally uses a Galvalume substrate. Both have factory-applied paint systems, but their underlying metallic coatings differ.
Selection depends on structural requirements, forming processes, end-use applications, strength requirements and applicable product specifications.
Z275 generally indicates a total zinc coating mass of 275 g/m² across both sides, subject to the applicable standard and test method.
PE, SMP, HDP and PVDF systems have different durability and weathering characteristics. The correct choice depends on the environment, design life and maintenance requirements.
GI steel coil uses a zinc coating, while GL steel coil uses an aluminum-zinc alloy coating. Their corrosion protection mechanisms and performance vary according to coating weight, environment and application.
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