IS 19841:2026 is an Indian standard recently issued by the Bureau of Indian Standards (BIS) that details the technical specifications for GG zinc alloy ingots intended for use in hot-dip galvanising of steel. The existence of such a standard paves the way for an organised approach to producing high-grade zinc alloys for industrial applications. The producers of such ingots have to adhere to a well-defined schedule and process.
Generally, at least 98.0%-98.5% purity is required, depending on the exact sub-grade, to ensure sufficient zinc for metallurgical reactions. This ensures that the presence of deleterious trace elements such as Lead (Pb), Cadmium (Cd), and Iron (Fe) is kept strictly within specified limits to prevent increased corrosion and the formation of mechanically weak areas. It allows customisation of alloying elements, such as Aluminium, to control ash skimmings and improve coating finish.
What Are Galvanising Grade (GG) Zinc Alloy Ingots?
The Galvanising Grade (GG) or Continuous Galvanising Grade (CGG) Zinc Alloy Ingots are specially designed blocks of molten zinc alloyed with specific quantities of other metals such as aluminium, nickel, or bismuth. These ingots are produced exclusively for application in galvanising baths to coat steel and iron items. In contrast with prime western zinc, which is pure, GG ingots are specifically developed to improve fluid dynamics in the molten zinc alloy bath, iron-zinc alloy growth, and coating surface quality.
Galvanising Grade (GG) or Continuous Galvanising Grade (CGG) Zinc Alloy Ingots are special high-purity zinc alloy raw materials that are utilised in molten baths to coat steel.
In the process of hot-dip galvanising, steel parts that have been cleaned are dipped into a molten bath of zinc, which is kept at about 450° C. GG Zinc Alloy Ingots are added into this molten bath in order to manage the composition of the zinc. The result is a much more uniform protective layer with better adherence properties. Such a layer serves as protection from moisture, chemicals, and atmospheric corrosion.
The standards, compositions, and performance of these alloy ingots are provided in the IS 19841:2026 – Galvanising Grade (GG) Zinc Alloy Ingots for Hot-Dip Galvanising of Steel standard.
Applications of Galvanising Grade Zinc Alloy Ingots
The GG zinc alloy ingots produced under IS 19841:2026 standards are used in several industries to produce superior-quality galvanised steel products. The main applications are:
- Structural Steel: Galvanisation of beams, columns, angles, and other structural sections used in building and industrial constructions.
- Power Transmission Tower: Corrosion protection of transmission towers, substations, and utility poles.
- Telecommunication Infrastructure: Galvanisation of telecom towers, communication poles, and antenna towers.
- Steel Pipes & Tubes: Corrosion protection coating of steel pipes used in construction, water pipelines, and other industries.
- Fasteners and Hardware: Galvanisation of bolts, nuts, washers, screws, and other hardware used in the construction industry.
- Highway & Road Safety Products: Coating of crash barriers, guard rails, road sign posts, and lighting poles to increase the longevity of such products.
- Solar Energy Infrastructure: Protection of steel solar energy mountings.
- Railway Infrastructure: Galvanisation of railway bridges, signal poles, fencing, and overhead constructions.
What is IS 19841:2026?
Indian Standard IS 19841:2026, formulated and issued by the Bureau of Indian Standards (BIS), lays down the requirements for Zinc Alloy Ingots for use in Hot Dip Galvanising of Steel. This standard sets out the quality requirements, chemical composition, manufacture, sampling, testing, and marking to ensure that zinc alloy ingots exhibit consistent properties during hot-dip galvanisation.
- Sets out the requirements for Galvanising Grade (GG) Zinc Alloy Ingots for Hot Dip Galvanising.
- States the composition of the alloy and its permissible impurities.
- Provides sampling and testing procedures to verify material quality.
- Provides marking and identification requirements for traceability.
- Ensures consistent alloy quality for efficient galvanisation.
- Facilitates the production of durable, corrosion-resistant galvanised steel products.
- Acts as the basis for certification of GG Zinc Alloy Ingots by BIS in India.
Why BIS Certification is Important for GG Zinc Alloy Ingots?
BIS Certification for Galvanising Grade (GG) Zinc Alloy Ingots under IS 19841:2026 is required to ensure that the product conforms to the requisite quality, safety, and performance criteria set by the Bureau of Indian Standards. It shows that the product meets the required chemical composition and quality criteria for producing high-quality, corrosion-resistant galvanised steel products.
- Ensures Conformity with IS 19841:2026: Ensures that the zinc alloy ingots conform to the requirements stated in the Indian Standard.
- Quality Control: Ensures that the alloy conforms to the required chemical composition and quality criteria, ensuring consistent galvanising performance.
- Increases Resistance to Corrosion: Enables the manufacture of a tough zinc coating that improves the durability of galvanised steel.
- Consistent Production: Helps ensure consistent product quality across different manufacturing batches.
- Customer Satisfaction: Ensures the product is made in accordance with the recognised national quality standard.
Who Needs BIS Certification?
The following organisations might need BIS Certification for the manufacturing, importing, or supplying of Galvanising Grade (GG) Zinc Alloy Ingots in India under IS 19841:2026:
- Indian Manufacturers: Manufacturing GG Zinc Alloy Ingots for sale in India.
- Foreign Manufacturers: Exporting GG Zinc Alloy Ingots into India under the BIS FMCS Scheme.
- Importers: Importing GG Zinc Alloy Ingots from BIS-certified foreign manufacturers.
- Brands/Private Labels: Selling GG Zinc Alloy Ingots under the brand name through BIS-certified manufacturing plants.
- Government & Infrastructure Projects Suppliers: Supplying BIS-certified zinc alloy ingots for government, railways, power, construction and infrastructure projects.
- Galvanising Plants: Purchasing BIS-certified GG Zinc Alloy Ingots.
Conclusion
BIS Certification for Galvanising Grade (GG) Zinc Alloy Ingots as per IS 19841:2026 is very important for manufacturers seeking to demonstrate the quality and compliance of their products. Adhering to this standard will ensure that zinc alloy ingots meet all required chemical composition and performance test requirements. This can lead to the production of high-quality galvanised steel products with improved corrosion resistance. Get in touch with ERCS to get a hassle-free BIS Certification process.
Frequently Asked Questions (FAQs)
Q1. What is IS 19841:2026?
Ans. IS 19841:2026 is an Indian Standard issued by the Bureau of Indian Standards (BIS) which provides specifications for Galvanising Grade (GG) Zinc Alloy Ingots that are utilised for hot-dip galvanising of steel.
Q2. Is BIS certification mandatory for Galvanising Grade (GG) Zinc Alloy Ingots?
Ans. No, BIS Certification for Galvanising Grade (GG) Zinc Alloy Ingots for hot-dip galvanising of Steel is not mandatory in India.
Q3. Who can apply for BIS Certification under IS 19841:2026?
Ans. Indian manufacturers, Foreign Manufacturers exporting to India under the scheme of the Foreign Manufacturers Certification Scheme (FMCS), and Brand Owners manufacturing through BIS-certified facilities can apply for BIS certification.
Q4. What documents are required for BIS certification?
Ans. Some of the common documents needed for BIS certification are the BIS application form, Factory registration, Manufacturing process, Quality Control, Product Specification, Lab Test Reports, Calibration Certificates, etc.
