Summary: October 10, 2026 — Ahead of the Fujian Marine Equipment Show (Oct 17, Fuzhou), more shipyards are moving from single-size shot to AI-graded mixed abrasives. Stable Sa2.5 / Rz75-100 μm profile, first-pass inspection, and about 30% lower abrasive consumption. Our PhD team has developed the grading system since 2022; Huahai and Gezhouba shipyards have run it for years. 28 warehouses in China, 72-hour delivery.

Ask a blasting foreman what goes wrong most often, and the answer is rarely the machine. It is the abrasive mix.

A single-size shot does one job well and everything else poorly. Thick rust zones come back for a second pass; thin plates get blasted too deep, trapping moisture under the primer. Inspectors catch it, and the section is redone.

Why graded mixes beat single sizes

A blast profile has a window to hit. Too shallow, the primer cannot grip. Too deep, moisture sits in the anchor pattern and the coating blisters.

Graded mixes — steel shot and grit in proportions matched to the plate, the machine and the target profile — hold that window across a whole hull. In our customers' trials, one ton of graded abrasive does the work of about 1.3 tons of single-size product.

What the grading system does

Since 2022 our PhD team has built and refined the system around one input set: machine model, plate material, required roughness.

Put those in, and it returns a mix ratio. Huahai Shipbuilding, Gezhouba Shipbuilding and Wuchang Shipbuilding have used it for years on plate pre-treatment and hull work.

Trial first, buy after

Send your machine model and plate specs, and we will run the numbers for free. Trial samples are available so you can compare consumption on your own line before committing.

28 warehouses across China, 72-hour nationwide delivery. Fujian and neighbouring provinces are covered by the nearest hub.

Wuhan Hongxin Lixin Metal Products Co., Ltd. (Ma Li Steel Shot)

Website: www.sisball.com

Hotline: +86 400-038-8928