Galvanized Steel Coils
Galvanized Steel Coils Manufacturer and Supplier in Indonesia
Galvanized steel coils are cold rolled steel coils coated with zinc by hot-dip galvanizing, protecting the steel from corrosion in humid and coastal environments. Sino East Steel is a galvanized steel coils manufacturer and supplier based in Tianjin, China, exporting to Indonesia and more than 50 countries for over 18 years. As a direct factory supplier with a 65,000 m2 production base and 500,000 tons of annual capacity, we deliver to Indonesian importers, distributors, contractors and project companies with complete documentation, including the Mill Test Certificate (MTC) per EN 10204 3.1 on every shipment.
Indonesian buyers choose our galvanized steel coils because every batch is tested in our ISO 9001:2015 certified quality system, packed seaworthy and shipped to Tanjung Priok (Jakarta), Tanjung Perak (Surabaya), Belawan (Medan) and Makassar within 18-25 days after production. Third-party inspection by SGS, BV or TUV can be arranged at the factory or at the destination port, and SNI documentation support is available for regulated applications.
What Is Galvanized Steel Coils?
Galvanized steel coil is produced by passing cold rolled steel through a bath of molten zinc at around 460 °C, creating a metallurgically bonded zinc coating. The result is a cost-effective corrosion-resistant material used by roof sheet rollers, purlin and profile manufacturers, duct fabricators, pipe producers and appliance makers across Indonesia. Coils are supplied in widths from 600 mm to 1500 mm, thicknesses from 0.3 mm to 3.0 mm, and zinc coatings from Z30 to Z275 g/m2, with Z350 available for coastal projects.
Sino East Steel supplies galvanized coils and slit coils with tight thickness tolerances, stable mechanical properties and full MTC documentation, keeping Indonesian manufacturers running without material-related stoppages.
Standards, Grades and Specification Range
Our galvanized steel coils is manufactured to internationally recognized standards and supplied in the sizes most frequently ordered by Indonesian importers and distributors:
| Item | Specification |
|---|---|
| Standards | ASTM A653, JIS G3302, EN 10346, GB/T 2518 |
| Zinc coating | Z30 - Z275 g/m2, Z350 on request |
| Thickness | 0.30 mm - 3.00 mm |
| Width | 600 mm - 1500 mm, slit coils available |
| Grades | CS-A/B/C, SS grades, full hard or annealed |
| Surface | Spangle, minimised spangle, or zero spangle |
| Forms | Coils, slit coils, sheets, corrugated sheets |
| Certification | ISO 9001:2015, MTC per EN 10204 3.1 |
Zinc Coating Weight and Spangle Control
Coating weight determines how long a galvanized coil lasts in service. We verify coating weight with magnetic thickness testing on every coil and control spangle size and surface finish to match your forming and painting process. For roofing and cladding applications in coastal Indonesia we recommend Z275 or higher; for indoor ducting and general fabrication Z180-Z220 is usually sufficient. Every coil is edge-trimmed and oiled or passivated to survive tropical sea freight without white rust.
Applications of Galvanized Steel Coils in Indonesia
- Roof and wall cladding - Base material for corrugated and trapezoidal roof sheet production.
- Purlin and profiles - C- and Z-purlins, decking profiles and cold-formed sections.
- Ductwork - HVAC ducting and air-handling components.
- Pipes and tubes - Base coil for spiral and ERW pipe production.
- Appliances and furniture - Cabinets, shelving and general fabrication.
Why Indonesian Buyers Buy Direct from Our Factory
When you source galvanized steel coils from Sino East Steel, you buy from the manufacturer, not a trading company. That means the specification confirmed in the quotation is the specification delivered, at mill-direct pricing with complete quality accountability:
| Factor | Factory direct (Sino East Steel) | Trading company |
|---|---|---|
| Pricing | Mill-direct, no middleman markup | Multiple markups added |
| Quality control | In-house testing lab, heat number traceability | Relies on supplier documents |
| Documentation | MTC per EN 10204 3.1 on every batch | Documents often incomplete |
| Production control | Direct scheduling, 15-25 days lead time | Lead time dependent on third parties |
| Custom orders | Custom dimensions and specifications accepted | Limited to stocked items |
How to Order Galvanized Steel Coils as an Indonesian Importer
- Send your required standard, grade, size, quantity and destination port to [email protected] or WhatsApp +86 186 2208 8833.
- Receive a formal quotation with FOB Tianjin or CIF pricing, delivery time and shipping options within 24 hours.
- Confirm the specification in writing; production starts after order confirmation and 30% deposit.
- Track your shipment with weekly progress updates and full export documentation, including MTC, commercial invoice, packing list and bill of lading.
Shipping and Logistics to Indonesian Ports
We ship on a monthly rolling schedule to the main Indonesian ports: Tanjung Priok (Jakarta), Tanjung Perak (Surabaya), Belawan (Medan) and Makassar, with regular consolidation for mixed-product container orders. Sea freight from Tianjin to Indonesian ports typically takes 18-25 days. Mixed sizes and mixed product lines can be consolidated in one container to reduce your total landed cost.
Frequently Asked Questions
What is the minimum order quantity?
MOQ is typically 5 metric tons per specification, and mixed-size container loads of 20 or 40 feet are welcomed for distributors and project stock orders.
What are the payment terms?
We accept T/T, L/C, D/A, D/P and O/A for long-term partners. Standard terms are 30% deposit and 70% against copy of shipping documents.
Do you provide Mill Test Certificates?
Yes, every batch ships with an MTC per EN 10204 3.1 including chemical composition and mechanical test results.
How long does delivery to Indonesia take?
Production takes 15-25 days after specification confirmation, followed by 18-25 days sea freight to Tanjung Priok, Tanjung Perak, Belawan or Makassar.
Can third-party inspection be arranged?
Yes, SGS, BV or TUV inspection can be arranged at the factory before loading or at the destination port, which is common for government and project supply in Indonesia.
What zinc coating weight should I order?
Z180-Z220 suits indoor and general use; Z275 or Z350 is recommended for coastal and outdoor applications in Indonesia.
Can you slit coils to my width?
Yes, we supply slit coils to your exact width to reduce processing waste.
Request a Quote from the Galvanized Steel Coils Manufacturer
Send your specification to [email protected] or message us on WhatsApp +86 186 2208 8833. We respond within 24 hours with pricing, lead time and shipping options to Indonesian ports.