Complete Reference Chart · March 2026

Blasting Media Comparison Chart: All Types Ranked by Key Properties

Q: Which blasting media is best overall?

There is no single best blasting media for all applications. Aluminum oxide ranks highest for versatility — high hardness (Mohs 9.0), excellent recyclability (100–200 cycles), silica-free, and compatible with the widest range of substrates. Steel grit and steel shot rank highest for cost-per-m² in high-volume automated blast rooms. Garnet ranks highest for open-air dust-sensitive environments. Glass bead is unmatched for non-directional satin finishes on stainless and aluminum. The correct choice depends entirely on substrate, coating system, equipment, and environmental constraints.

Q: What is the hardest blasting media?

Silicon carbide is the hardest commercially available blasting media at Mohs 9.5, followed by aluminum oxide at Mohs 9.0, steel grit and shot at approximately Mohs 8.0, garnet at 7.5–8.0, copper slag at approximately 7.0, glass bead at 5.5–6.0, and plastic media at 3.0–4.0.

Q: Which blasting media is most recyclable?

Steel grit and steel shot are the most recyclable blasting media, achieving 500–2,000+ cycles in well-maintained automated blast rooms with proper classifier and separator systems. Aluminum oxide follows at 100–200 cycles in cabinet systems. Glass bead achieves 30–50 cycles and garnet 3–5 cycles. Single-use media — copper slag, coal slag, and most industrial by-products — have zero recycle life.

Q: Which blasting media is silica-free?

All of the following are silica-free and OSHA/EU compliant: aluminum oxide (both BFA and WFA grades, <0.1% free silica), silicon carbide (<0.1%), garnet (<1%), glass bead (0% — amorphous glass), steel grit and steel shot (metallic, no silica), and plastic blast media (synthetic polymer, no silica). Walnut shell and corn cob are also silica-free. The only common blasting abrasive that is NOT silica-free is crystalline silica sand itself, which is banned or severely restricted in most industrialized countries.

The definitive single-page reference for industrial blasting media selection — all major abrasive types compared across hardness, particle shape, surface profile, recyclability, silica compliance, cost, dust generation, and substrate compatibility. Updated March 2026.

Updated March 2026 · 12-minute read · Jiangsu Henglihong Technology Co., Ltd.

📖Part of our complete abrasive blasting resource library. For full application guidance and selection framework, visit the Blasting Media: Complete Industry Guide.

1. How to Use This Comparison Guide

This page is designed as a working reference tool, not just an informational article. It contains four distinct comparison resources that serve different decision-making needs:

The Master Comparison Table (Section 2) covers all major technical and commercial parameters for every blasting media type in a single scrollable table — use this for a complete side-by-side view.
The Property Rankings (Sections 3–6) rank each media type on a single critical dimension — use these when one factor (hardness, recyclability, dust, cost) is the primary decision driver.
The Substrate Compatibility Matrix (Section 7) shows at a glance which media types are approved, acceptable, or prohibited for each major substrate material — use this to immediately eliminate non-compatible options.
The Decision Guide (Section 8) maps the most common application scenarios to the correct media specification — use this when you have a specific situation and need the recommendation directly.

Important Note on Comparison Context No blasting media is universally best across all dimensions. Aluminum oxide leads on versatility; steel abrasives lead on recyclability and cost-per-m² at scale; garnet leads on dust control; glass bead leads on finish quality for non-ferrous metals; silicon carbide leads on raw hardness. The correct specification always depends on substrate, coating system, equipment, and environmental constraints — no comparison chart substitutes for the selection framework in our complete media selection guide.

2. Master Comparison Table — All Media Types

The table below compares all commercially significant blasting media types across ten key parameters. Scroll horizontally on mobile to view all columns. For detailed technical data and application guidance on any individual media type, follow the links in the deep-dive guides listed at the end of this article.

Excellent Good Poor / Not suitable ★ = Recycle cycle rating (5★ = 500+ cycles)

媒体类型	莫氏硬度	粒子形状	Profile Depth	Recycle Life	Silica-Free?	Dust Level	Price /MT (USD)	Cost/m² Rank	类别
Aluminum Oxide (BFA)	9.0	有角的	High (50–120 µm)	★★★★	Yes <0.1%	Low–Med	$600–900	⭐⭐⭐⭐⭐ (cabinets)	Mineral
Aluminum Oxide (WFA)	9.2	有角的	High (45–110 µm)	★★★★	Yes <0.05%	Low–Med	$900–1,400	⭐⭐⭐⭐ (SS / Ti)	Mineral
碳化硅	9.5	Angular / splintery	Very High	★★	Yes <0.1%	Medium	$1,400–2,200	⭐⭐ (specialist)	Mineral
Garnet (almandine)	7.5–8	Sub-angular	High (40–90 µm)	★★	Yes <1%	Very Low	$400–700	⭐⭐⭐⭐ (open blast)	Mineral
钢砂	~8.0	有角的	Very High (75–150 µm)	★★★★★	No (iron)	Low (closed)	$700–1,100	⭐⭐⭐⭐⭐ (blast rooms)	Metallic
钢丸	~8.0	Spherical	Low–Med (peened)	★★★★★	No (iron)	Low (closed)	$700–1,100	⭐⭐⭐⭐⭐ (blast rooms)	Metallic
Glass Bead	5.5–6	Spherical	Low (smooth, 10–35 µm)	★★★	Yes 0%	Low–Med	$500–900	⭐⭐⭐⭐ (finishing)	Synthetic
Plastic Media (melamine)	3–4	Angular / blocky	Minimal (<5 µm)	★★★	Yes 0%	Low	$1,200–2,000	⭐⭐⭐ (specialist)	Synthetic
Walnut Shell	3–4	Irregular	Negligible	★	Yes 0%	Very Low	$300–600	⭐⭐ (light clean)	Organic
Copper Slag	~7.0	有角的	High	Single use	Yes	High	$100–200	⭐ (high disposal cost)	By-product
Coal Slag	6-7	有角的	Med–High	Single use	Verify	Very High	$80–180	⭐ (high disposal cost)	By-product

Prices indicative FOB China, March 2026. Recycle dots: ●●●●● = 500+ cycles · ●●●●○ = 100–200 · ●●●○○ = 30–50 · ●●○○○ = 3–10 · ●○○○○ = 1–3 · ○○○○○ = single-use. Cost/m² rankings apply in appropriate equipment context.

3. Hardness Ranking (Mohs Scale)

Hardness determines cutting speed and the range of substrates a media type can effectively treat. Higher hardness means faster material removal on hard substrates and a deeper anchor profile at equivalent grit size and blast pressure — but also greater risk of substrate damage if the media is too hard for the workpiece material. For detailed guidance on hardness implications for substrate selection, see the complete blasting media types guide.

Hardness — Ranked Highest to Lowest (Mohs)

碳化硅

Mohs 9.5

9.5

Al₂O₃ White (WFA)

Mohs 9.2

9.2

Al₂O₃ Brown (BFA)

Mohs 9.0

9.0

Steel Grit / Shot

Mohs ~8.0

~8.0

石榴石

Mohs 7.5–8

7.5–8

Copper Slag

Mohs ~7.0

~7.0

Coal Slag

Mohs 6–7

6-7

Glass Bead

Mohs 5.5–6

5.5–6

塑料介质

Mohs 3–4

3–4

Walnut Shell

Mohs 3–4

3–4

4. Recyclability Ranking

Recyclability determines cost-per-m² in recirculating systems and total waste volume generated over a production run. For the full economic analysis of recyclability's impact on operating cost, see the Blasting Media Cost Guide & ROI Analysis.

Recycle Life — Ranked Highest to Lowest (Cycles in Appropriate Equipment)

钢丸

1,000–2,000+ cycles

2000+

钢砂

500–1,500 cycles

1500

Al₂O₃ (BFA/WFA)

100–200 cycles

200

Glass Bead

30–50

塑料介质

20–50

碳化硅

10-30

石榴石

3–5

Walnut Shell

1–3

Copper Slag

Single use

Coal Slag

Single use

5. Dust Generation Ranking

Dust generation is a critical environmental and health parameter for open blasting operations. Lower dust means better worker visibility, lower exposure risk, reduced containment infrastructure requirements, and easier permit compliance. For full guidance on dust control and regulatory compliance, see the eco-friendly and silica-free blasting media guide.

Dust Generation — Ranked Lowest (Best) to Highest (Worst)

石榴石

Very Low

Best

Steel Grit / Shot

Low (enclosed)

塑料介质

Low

Walnut Shell

Low

Glass Bead

Low–Medium

Al₂O₃ (BFA/WFA)

Low–Medium

碳化硅

Medium (friable)

Copper Slag

High

Coal Slag

Very High — highest dust generation

Worst

6. Cost-per-m² Ranking

This ranking reflects total cost per m² of surface treated in the most appropriate equipment context for each media type — not unit purchase price per kg. Rankings invert significantly from raw price rankings once recyclability and disposal costs are factored in. Full methodology and worked examples are in the Blasting Media Cost Guide & ROI Analysis.

Cost per m² — Ranked Lowest (Best) to Highest (Worst) in Appropriate Equipment

Steel Grit / Shot

Lowest

~$0.01

Al₂O₃ (cabinet)

~$0.025

Garnet (open blast)

~$0.05

Glass Bead (cabinet)

~$0.06

塑料介质

~$0.08

碳化硅

~$0.12 (specialist)

~$0.12

Copper Slag (+ disposal)

~$0.15 (high disposal)

~$0.15

Coal Slag (+ disposal)

~$0.18+ (very high disposal)

~$0.18+

Cost/m² estimates are indicative for standard production conditions in appropriate equipment, including amortized media cost and typical non-hazardous disposal. Hazardous waste disposal rates multiply slag costs significantly. March 2026 pricing basis.

7. Substrate Compatibility Matrix

The matrix below provides an at-a-glance view of which media types are suitable, acceptable with conditions, or prohibited for each major substrate category. For the full substrate-to-media decision framework, see the complete blasting media selection guide.

Substrate	Al₂O₃ BFA	Al₂O₃ WFA	SiC	石榴石	钢砂	钢丸	Glass Bead	Plastic	Walnut Shell
Carbon / structural steel	✅	✅	⚠️	✅	✅	✅	⚠️	❌	❌
不锈钢	⚠️	✅	⚠️	✅	❌	❌	✅	❌	❌
Aluminum alloys	⚠️	⚠️	❌	⚠️	❌	❌	✅	✅	⚠️
Titanium / Ni superalloys	⚠️	✅	⚠️	✅	❌	❌	✅	⚠️	❌
CFRP / Composites	❌	❌	❌	❌	❌	❌	❌	✅	⚠️
Fiberglass (GRP)	❌	❌	❌	❌	❌	❌	⚠️	✅	⚠️
Cast iron	✅	✅	⚠️	✅	✅	✅	⚠️	❌	❌
Glass / ceramics	⚠️	⚠️	✅	⚠️	❌	❌	⚠️	❌	❌
Stone / masonry	✅	⚠️	⚠️	✅	❌	❌	❌	❌	✅
Zinc / magnesium alloys	❌	⚠️	❌	❌	❌	❌	✅	✅	⚠️

✅ Suitable · ⚠️ Acceptable with conditions (see individual media guides for constraints) · ❌ Not suitable

8. Decision Guide — Best Media by Scenario

The following quick-reference guide maps the most common industrial blasting scenarios to the correct media specification. Each recommendation reflects the optimal choice considering performance, cost, and regulatory compliance as of March 2026.

If your situation is... → Specify this media

Structural steel, Sa 2.5, epoxy primer

Al₂O₃ 36–60G (cabinet) · Garnet 30–60M (open)

Industry standard — see industrial surface prep guide

High-volume automated blast room

Steel Grit G25–G40 + Steel Shot blend

Lowest cost/m² — see steel grit vs steel shot guide

Stainless steel (no iron contamination)

White Al₂O₃ 80–120G · Glass Bead #8–#11

Iron-free media mandatory — see substrate matrix above

Aluminum body panels / thin sheet

Glass Bead #8–#11 (steel) · Plastic Media 20–30M (aluminum)

Warp prevention — see automotive restoration guide

CFRP / fiberglass composites

Plastic Blast Media — urea or melamine 16–30M

Only safe abrasive — see plastic media guide

Pipeline FBE / 3LPE coating prep

Garnet 40–60M (low chloride <25 ppm)

See pipeline section in industrial surface prep guide

Glass etching / stone carving

Silicon Carbide F24–F80 (black SiC)

Hardest available — see silicon carbide guide

Open blast — dust control critical

Garnet 30–60M · or wet blast system with any mineral media

See eco-friendly blasting media guide

Satin / decorative finish on metal

Glass Bead #8–#12 (grade by desired texture)

See glass bead guide

Lowest cost per m² over time

Steel Grit (blast rooms) · Al₂O₃ (mineral cabinet systems)

See cost guide & ROI analysis

9. Frequently Asked Questions

Which blasting media is best overall?

There is no single best blasting media for all applications. Aluminum oxide (brown or white fused) ranks highest for versatility — hard enough for most industrial substrates, silica-free, recyclable 100–200 cycles, and compatible with the widest range of substrates and equipment types. Steel grit and steel shot rank best on cost-per-m² in high-volume automated blast rooms. Garnet leads for open-air, dust-sensitive environments. Glass bead is unmatched for non-directional satin finishes on stainless steel and aluminum. Silicon carbide is the only practical choice for glass etching and very hard ceramic substrates. Plastic media is the only safe option for composites. The correct specification always depends on substrate, coating system, equipment, and environmental constraints.

What is the hardest blasting media?

Silicon carbide is the hardest commercially available blasting media at Mohs 9.5, followed by white fused aluminum oxide at approximately Mohs 9.2, brown fused aluminum oxide at 9.0, steel grit and shot at approximately 8.0, garnet at 7.5–8.0, copper slag at approximately 7.0, coal slag at 6–7, glass bead at 5.5–6.0, and plastic blast media and walnut shell at 3.0–4.0. See the complete silicon carbide blast media guide for full detail on the hardest abrasive.

Which blasting media is most recyclable?

Steel shot is the most recyclable blasting media, achieving 1,000–2,000+ cycles in well-maintained automated blast rooms. Steel grit follows at 500–1,500 cycles. Aluminum oxide achieves 100–200 cycles in cabinet blast systems. Glass bead achieves 30–50 cycles and plastic media 20–50 cycles. Garnet averages 3–5 cycles, making it only marginally better than single-use media in terms of recyclability — though its very low dust generation justifies its use for open blasting applications. Copper slag and coal slag are single-use with no recycle life. For the full recyclability economics analysis, see the Blasting Media Cost Guide & ROI Analysis.

Which blasting media is silica-free?

The following blasting media types are silica-free and compliant with OSHA 29 CFR 1926.1153 and EU Directive 2017/2398: aluminum oxide (BFA and WFA, both <0.1% free silica), silicon carbide (<0.1%), garnet (<1%), glass bead (0% — made from amorphous glass), steel grit and steel shot (metallic, no silica), plastic blast media (synthetic polymer, no silica), walnut shell and corn cob (organic, no silica). The only common blasting abrasive that contains significant free crystalline silica is silica sand itself, which is banned for professional blasting in most industrialized countries. Coal slag requires verification — some sources contain low but potentially regulated levels of free silica. For the full regulatory picture, see the eco-friendly and silica-free blasting media guide.

How do I use this comparison chart to select blasting media?

Start with the substrate compatibility matrix in Section 7 to immediately eliminate any media types that are not compatible with your substrate material. Then apply your primary decision constraint: if cost-per-m² is the driver, use the cost ranking in Section 6; if dust control is the driver, use the dust ranking in Section 5; if maximum recyclability is required, use Section 4; if substrate hardness is the limiting factor, use the hardness ranking in Section 3. Finally, check the Decision Guide in Section 8 to confirm the recommendation against your specific application scenario. For a full structured decision framework including grit size selection and equipment compatibility, refer to the complete blasting media selection guide.

In-Depth Guides for Each Media Type

Use the links below to access complete technical specifications, grit size tables, application guidance, and sourcing information for each individual blasting media type:

Blasting Media: Complete Industry Guide — full pillar page covering all topics
How to Choose the Right Blasting Media — structured selection framework
Types of Blasting Media: Complete Guide — all types in one guide
Aluminum Oxide Blast Media — grit sizes, BFA vs WFA, applications
Silicon Carbide Blast Media — hardest abrasive, glass and ceramic applications
Garnet Blasting Media — low-dust, pipeline, waterjet cutting
Steel Grit vs Steel Shot — metallic abrasives, grades, blending
Glass Bead Blasting Media — grades, finish types, stainless and aluminum
Plastic Blast Media for Aerospace & Automotive
Blasting Media Cost Guide & ROI Analysis
Eco-Friendly Blasting Media: Low-Dust & Silica-Free Options
Blasting Media Safety Guide: Silica Risks & PPE
Industrial Surface Prep: Best Blasting Media for Metal
Blasting Media for Automotive Restoration

Ready to Source the Right Blasting Media?

Jiangsu Henglihong Technology supplies aluminum oxide, garnet, glass bead, silicon carbide, and specialty abrasives to industrial buyers worldwide — with full QC documentation, competitive pricing, and reliable sea freight logistics.

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