Customers of Newinds often find themselves weighing the options between hot dip galvanised steel and stainless steel. How do these materials differ, and which is the most suitable for your project? This article explores hot dip galvanised steel, compares it with stainless steel, and provides insights to help you make the best decision for your needs.
WHAT IS HOT DIP GALVANISED STEEL (HDG)?
Hot dip galvanised steel is produced by submerging steel components in a bath of molten zinc at approximately 450°C. This process creates a robust zinc-iron alloy coating that acts as a protective shield, safeguarding the steel from rust and environmental damage. The coating bonds molecularly with the steel, ensuring comprehensive protection even on complex shapes like threads and welds.
WHERE ARE HOT DIP GALVANISED PRODUCTS USED?
Thanks to its durability and corrosion resistance, HDG products are widely used in various applications, including:
– Structural Frameworks: Supporting buildings, bridges, and industrial structures.
– Cable Containment Systems: Protecting electrical and data cables in commercial and residential projects.
– Outdoor Installations: Handrails, fencing, solar panel mounts, and gantries designed to withstand harsh weather conditions.
– HVAC and Mechanical Systems: Durable fixings and supports for heating, ventilation, and air conditioning systems.
POPULAR HOT DIP GALVANISED PRODUCTS
COMPARATIVE OVERVIEW: HOT DIP GALVANISED STEEL VS. STAINLESS STEEL
Choosing between HDG steel and stainless steel depends on project requirements, budget, and environmental conditions. Below is a comparative overview:
| Feature | Hot Dip Galvanised Steel | Stainless Steel (A2/A4) |
| Corrosion Resistance | Excellent (20–70+ years) | Superior (40–100+ years) |
| Coating Thickness | 50–100 μm | Inherent (no coating) |
| Cost Efficiency | High | Lower |
| Appearance | Matte grey | Polished finish |
| Common Use | Outdoor, industrial settings | Marine, high-hygiene areas |
QUALITY STANDARDS FOR HOT DIP GALVANISED STEEL
Hot dip galvanised products are subject to stringent quality standards, which vary by region. Galvanised steel factories must thoroughly research the specific requirements of each country to ensure compliance with the galvanising process and resulting product quality. Key standards include:
1. ISO (International Organization for Standardization)
– ISO 1461:2022: Specifies the properties of hot-dip galvanised coatings and testing methods.
– ISO 10684: Covers hot-dip galvanised fasteners and components.
– ISO 14713-1: Provides guidelines for design and corrosion resistance of zinc coatings.
2. EN / EN ISO (European Standards)
– EN ISO 1461: The European equivalent of ISO 1461, applicable to processed steel structures.
– EN 10348-2:2018: Specifies galvanised reinforcing steel for concrete under European standards.
3. ASTM (United States)
– ASTM A123 / A123M: Covers hot-dip galvanising for steel structures, pipes, and large components.
– ASTM A153 / A153M: Applies to small components, fasteners, and fittings.
– ASTM A767 / A767M: Specifies galvanised reinforcing steel (rebar).
– ASTM F2329: Covers galvanising for bolts, nuts, and specialised threaded components.
4. Other Country-Specific Standards
– AS/NZS 4680 (Australia/New Zealand): Governs hot-dip galvanising for fabricated steel components.
– CAN/CSA G164 (Canada): Applies to hot-dip galvanising for irregularly shaped components.
HDG steel is an efficient, cost-effective solution chosen by many project owners to ensure long-term durability. The quality of hot dip galvanised products heavily depends on the expertise of the galvanised steel factory. Therefore, careful research and evaluation are essential to select a reliable manufacturing partner.
Newinds Corporation Vietnam supplies a comprehensive range of HDG steel products worldwide. Our products are designed and manufactured to ensure reliability, durability, and effective corrosion resistance. With an experienced consulting team, we are ready to deliver top-quality solutions in the shortest possible time.
Contact Newinds:
Email: sales@newindscorp.com
Phone/Whatsapp/Zalo: Ann Yen +84 868 482 038