Colombian Customer Purchases 104 Tons of Galvalume Steel Coils

A customer from Colombia purchased a batch of galvalume steel coils. The product features a DX51D base material and an AZ30 coating, with dimensions of 0.41 × 1220 mm, and both sides of the coils were treated with a fingerprint-resistant finish.

The total order volume was approximately 104 metric tons. In addition to the surface treatment and dimensional requirements of the product itself, the customer placed particular emphasis on the weight per coil, edge protection, and container loading weight. The final production plan needed to meet the total purchase volume while reasonably controlling the weight per coil to reduce the risk of the coil edges being crushed during transportation and loading/unloading.

Order Specifications

Item	Customer Requirements
Product Name	GL / Galvalume Steel Coil
Surface Treatment	Double-sided fingerprint resistant
Country of Origin	Colombia
Material	DX51D
Coating	AZ30
Specifications	0.41 × 1220 mm
Total Quantity	Approximately 104 tons
Weight per Roll	Please keep the weight under 4 tons as much as possible
Container Loading	Each container should ideally be close to 26 tons
Color	No color requirements
Hardness	No special requirements
Delivery Time	Approximately 15 days after receiving prepayment
Trade Terms	FOB
Payment Terms	30% TT prepayment + 70% TT before shipment

Note: This order was signed on September 1st and is currently in the raw material preparation stage. The pictures shown on the page are of the aluminized zinc steel coils we produced previously.

Why does the customer require that the weight of each coil be kept under 4 metric tons?

This is because the customer’s lifting equipment has a maximum lifting capacity of 4 metric tons. Another reason is that the customer is concerned that if the coil weight is too heavy, the edges of the steel coils will be more susceptible to significant pressure during transportation, loading, unloading, or stacking, thereby increasing the risk of edge deformation and indentations.

Therefore, this order does not simply aim to maximize the weight of each coil, but rather to reasonably control the weight of the finished coils during the production and slitting processes.

Aluminum-zinc steel coil production completed

Product surface details

Our Solutions

Coil Weight Control

Prior to production, the target weight of each coil is precisely calculated at 3.71 metric tons, ensuring that the coil diameter for the 0.41 mm × 1220 mm specification remains within a reasonable range.
Closed-loop tension control is employed during the winding process to ensure uniform tightness—preventing the inner layer from becoming loose or the outer layer from becoming too tight—and to avoid layer misalignment during transportation.
Each coil is weighed and labeled with its actual weight immediately upon completion, ensuring the total weight of 28 coils is close to 104 metric tons, while no single coil exceeds the 4-metric-ton limit.

Aluminized zinc steel coil

Surface characteristics

Surface Protection

After the fingerprint-resistant coating has cured, online surface quality inspection is conducted to ensure the coating is uniform, with no missed areas or streaks.
The outer circumference of each coil is wrapped in rust-proof paper and PE protective film to prevent surface abrasion during lifting and transportation; protective plates are installed on both ends of the coil to shield the edges from impact.
When packing, appropriate spacing is maintained between coils, and they are secured with wooden battens to prevent surface dents caused by the coils rolling and colliding during ocean transport.