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Steel Shot & Steel Grit
Cast steel shot and cast steel grit are industrial metal abrasives used in wheel-blast and air-blast surface preparation. Their performance is defined not only by size but also by particle morphology, hardness distribution, operating mix, and separator efficiency.
Promisteel coordinates export supply with qualified metal-abrasive partners in the Zouping, Shandong, supply cluster. We support grade selection, batch documents, export packing, and trial-based evaluation for steel structures, cylinders, automotive components, foundries, and heavy machinery.
2,000–2,800* application-dependent reference cycle-life range for quality cast steel shot
| S70–S780 / G10–G120 common supplied size range for shot and grit | COA / TDS / SDS documents available for the confirmed grade or batch |
Media size and hardness should be validated by a controlled line trial. The recommendations below are practical starting points-not a substitute for the customer's applicable process specification or coating requirement.
Application guide
Steel Structure Pretreatment
Remove mill scale and corrosion from H-beams, plates and bridge components before coating. For roller-conveyor lines, a common starting target is Sa 2.5 with a profile matched to the coating system.
Starting range: S280–S330; optional G25–G40 for additional cutting action01
LPG Cylinder Production & Refurbishment
Clean exterior surfaces and prepare internal surfaces before inspection or coating. Exterior cleaning and interior descaling are assessed separately because access, contamination and required finish differ.
Starting range: exterior S230–S330; interior G25–G4002
Automotive Cleaning & Specified Peening
Prepare chassis components for e-coating and clean production parts. For springs, gears or other fatigue-critical peening operations, confirm the specified media and process standard before quoting.
Starting range: cleaning S230–S330; specified peening range S110–S23003
Heavy Machinery & Castings
Remove casting sand, heavy scale and corrosion from excavator buckets, frames and welded structures. A controlled shot-and-grit mix can balance cutting performance with operating stability.
Starting range: S330–S460 mixed with G18–G4004
Weld Cleaning & Anti-corrosion Coating
Remove weld slag and create an anchor profile for paint or epoxy adhesion. The coating supplier's specified profile and cleanliness requirement should determine the final abrasive selection.
Starting range: S280–S460 or G25–G5005
Product Selection
| Product | Particle behaviour | Typical use | Reference range |
|---|---|---|---|
| Cast Steel Shot | Rounded particles produce a uniform impact or hammering action. | General blast cleaning, finishing and controlled surface treatment in wheel-blast equipment. | S70–S780 Standard: 40–51 HRC |
| Cast Steel Grit | Crushed, angular particles provide stronger cutting action and faster profile development. | Heavy descaling, casting sand removal and coating-preparation profiling. | G10–G120 Grades: GP / GL / GH |
Operating cost
Media with the same nominal SAE size can perform differently because of hardness distribution, density, internal defects, heat treatment and fines generation. A lower purchase price may be offset by higher top-up, separator load, dust and downtime.
| Quotation-only comparison | Controlled production comparison |
|---|---|
| Focuses on price per ton. | Measures cost per accepted cleaned square metre or part. |
| May overlook breakage, fines and media top-up. | Records top-up rate, fines and separator condition. |
| Does not show the effect on output. | Checks achieved cleanliness, profile, throughput and machine load. |
Keep constant during a trial
| Record during a trial
|
Technical baseline
| Property | Reference value | Why it matters |
|---|---|---|
| Carbon | 0.80–1.20% | Core chemical reference for high-carbon cast steel media. |
| Silicon / Manganese | Si ≥ 0.40%; Mn 0.35–1.20% | Supports the intended heat-treatment and performance balance. |
| Sulfur / Phosphorus | ≤ 0.05% each | Controlled as part of batch-quality requirements. |
| Density | ≥ 7.0 g/cm³ | Affects impact energy and operating behaviour. |
| Standard steel-shot hardness | 40–51 HRC | Reference range; specify a different range only against the confirmed process. |
Standards referencesSAE J444 for size classification; SAE J827 for high-carbon cast steel shot; SAE J1993 for cast steel grit.
| Batch-supporting documentsApplicable COA, TDS and SDS can be supplied after the grade and batch are confirmed.
|
Export packing
Choose the packing configuration around receiving equipment, order volume and container-loading plan. Confirm packing weight, palletisation, labels, shipping marks and any liner requirement before the quotation is finalised.
Steel Drums
Protected individual units for storage, handling and smaller packing configurations.
Bulk Bags
Efficient for bulk orders and container loading where suitable lifting equipment is available.
Palletised Export Packs
Wrapped and secured packs to support warehouse handling and international shipment.
FAQ
Q: How do you recommend the correct size and grade?
A: We review the workpiece material and dimensions, current surface condition, machine type, current abrasive, required cleanliness or roughness, production rate and any customer process specification. The final recommendation should be validated on the line.
Q: Can I receive a sample and inspection report?
A: A 1–5 kg evaluation sample may be arranged for qualified projects. The applicable batch COA, TDS, or SDS is supplied according to the confirmed product.
Q: What should be included in an RFQ?
A: Please provide the workpiece, blast machine, current media, required surface result, monthly demand, requested packing, and destination port. This lets us recommend a realistic starting grade and export quotation.
Tell us what you are blasting.
Share the workpiece, machine type, current abrasive, required surface result, order volume, packing and destination port. We will prepare a practical starting recommendation and bulk quotation.
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