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SGA 20/40 Mesh Alluvial Garnet for Sandblasting

SGA 20/40 is a coarse alluvial garnet abrasive for heavy-duty sandblasting, rust and coating removal, and steel surface preparation. Controlled 20/40 mesh sizing supports strong cleaning action and consistent abrasive feeding.

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Model:
SGA20/40
Code:
25132000

20/40 Mesh Blasting Abrasive

SGA 20/40 River Garnet for Blasting

Coarse river garnet abrasive for sandblasting, rust removal, steel structure cleaning and heavy-duty surface preparation. SGA 20/40 provides strong impact force, stable cleaning performance and lower dust compared with many traditional blasting media.

Fast Rust & Coating Removal

Low Dust & Silica-Free

Reusable & High Density

Bulk Export Packaging

Download (GARNET SGA) TDS

What Is SGA 20/40 Garnet?

SGA 20/40 is a coarse alluvial river garnet abrasive. Through natural water flow and later processing, the material keeps a hard, dense and sub-angular particle shape for strong surface impact and efficient cleaning.

20/40 Mesh Grade Coarse size for heavy-duty blasting work.

Rust & Coating Removal Suitable for scale, coating and corrosion removal.

Stable Mineral Quality Natural inert mineral, non-toxic and chemically stable.

Lower Dust Blasting Lower dust than many traditional blasting media.

Strong Cutting Force Good impact force for steel and marine maintenance.

Export Packaging Available in 25kg bags and 1000kg jumbo bags.

Key Applications

Ship Hull Blasting

For marine maintenance, coating removal and surface preparation before repainting.

Steel structure blasting with garnet abrasive

Steel Structure Cleaning

For bridges, steel frames, tanks, pipelines and industrial equipment.

Heavy Rust Removal

Coarse 20/40 mesh grains provide strong impact force for heavily rusted steel surfaces, old coatings and rough industrial maintenance work.

Production Process

River garnet is processed through multiple steps to remove impurities, control particle size and prepare stable abrasive grades for export supply.(You can click on "Quality Control System" on the second page to view the specific generation process.)

01 Raw Material
Selected alluvial river garnet source.

02 Washing & Drying
Remove mud, moisture and loose impurities.

03 Screening
Control 20/40 mesh particle size.

04 Inspection & Packing
Verify quality and prepare export bags.

River Garnet Source

Processing & Classification

Laboratory Testing & Quality Control

Quality control is used to verify particle size distribution, bulk density, specific gravity, moisture and chloride content before export supply.

Particle Size Distribution Testing for 20/40 mesh before shipment.

Moisture Control Supports free-flowing abrasive and stable packing.

Chloride Content Reviewed for blasted steel surface preparation.

In-house laboratory for garnet batch inspection and quality testing

Chemical Composition & Physical Properties

Typical Specification
Mesh Size	20/40 mesh
Color	Pink / reddish brown
Hardness	7.5-8.0 Mohs
Specific Gravity	4.1-4.2 g/cm³
Bulk Density	2.0-2.4 g/cm³
Main Use	Sandblasting, rust removal and surface preparation

SGA Garnet vs Typical Slag Abrasive

Property	SGA Garnet	Typical Slag
Dust Level	Low	Often higher
Free Silica	Low / silica-free abrasive option	May vary
Cutting Profile	Consistent	Variable
Reuse Potential	Possible depending on condition	Often lower
Surface Cleanliness	Clean and chemically inert	May leave more residue

Packaging and Delivery

SEPPE provides export-ready packaging for SGA garnet abrasives. Common options include 25kg woven bags and 1000kg jumbo bags. Palletizing and container loading can be arranged according to order quantity and destination requirements.

25kg Woven Bag

1000kg Jumbo Bag

Container Loading

FAQ

?How many times can blasting garnet be reused?

Typically 3-5 times depending on blasting pressure, surface condition and recovery system.

?Does blasting garnet contain free silica?

SGA garnet is a silica-free abrasive option and is often chosen as a safer alternative to silica sand.

?What mesh should I choose for heavy rust removal?

20/40 mesh is recommended for heavy rust, thick coating and aggressive cleaning.

?Can I get samples before ordering?

Yes. Samples and technical documents can be arranged on request.

Need a Quote or Free Sample?

Send us your required mesh size, application, quantity and destination port. SEPPE will provide product specifications, packaging options and quotation support.

Request a Quote

SEPPE Product Data

SGA 20/40 Particle Size and Quality Control

This page presents the particle-size data published for SEPPE SGA 20/40 and the production-control sequence used for alluvial garnet processing.

Download Current TDS Request a COA or Sample

Particle Size Distribution

The largest retained fractions are ASTM #30 at 33.8% and #35 at 24.0%. Cumulative retained reaches 82.8% at #35 and 98.1% at #40.

Retained Particle Distribution Cumulative Particle Distribution

Exact Sieve Analysis

Sieve opening	ASTM sieve	Published range	Retained mass	Cumulative retained
0.850 mm	#20	0-10%	4.70%	4.70%
0.710 mm	#25	>85% combined	20.30%	25.00%
0.600 mm	#30		33.80%	58.80%
0.500 mm	#35		24.00%	82.80%
0.425 mm	#40		15.30%	98.10%
<0.425 mm	Below #40	0-5%	1.90%	100.00%

Values shown are typical product data from the current SEPPE SGA 20/40 technical data sheet. Order-specific documentation is available on request.

Production and Quality Control

Consistent SGA 20/40 grading depends on control throughout the production process. Raw garnet is selected, separated, washed, dried and screened before finished-product samples are inspected for packing.

Raw Material Selection

Selected alluvial garnet provides the starting material. Particle condition, mineral composition and unwanted material are reviewed before processing.