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What are S330/S390 ST Series Steel Shot suitable for?

S330 / S390 ST Series Steel Shot

S330 / S390 ST Series Steel Shot are medium to large-size secondary-quenched steel shot abrasives designed for general shot blasting, casting cleaning and metal surface preparation. These ST Series steel shot grades provide strong cleaning efficiency while maintaining stable surface quality, with consistent hardness, better toughness, lower breakage and more reliable blasting performance than ordinary steel shot.

S330 ST Series steel shot is suitable for medium castings, forgings, machinery parts, automotive components and general steel workpieces that require balanced cleaning performance. S390 ST Series steel shot offers a stronger impact force and is commonly used for heavier castings, forged parts, steel structures, desanding, descaling, rust removal and surface preparation before coating or painting.

  • Payment :

    T/T,L/C

  • Product Origin :

    Shandong, China

  • Shipping Port :

    Qingdao

  • Lead Time :

    15-30 Days
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Product Introduction

High-reliability steel shot developed for demanding shot peening applications and precision manufacturing.

S330 / S390 ST Series Steel Shot are high-performance secondary-quenched steel abrasives developed for medium to heavy-duty shot blasting operations. Through the ST Series double quenching process, the steel shot gains improved internal structure, more stable hardness and better resistance to impact fatigue, helping maintain consistent blasting performance during repeated circulation.

 

S330 ST Series Steel Shot is designed for applications that require a balanced combination of cleaning power and surface control. It is commonly used for medium castings, forged parts, machinery components, automotive parts and general steel workpieces. This grade helps remove sand, rust, light scale and surface contaminants while preparing a clean and uniform surface for painting, coating or further processing.

 

S390 ST Series Steel Shot provides a higher impact force and is more suitable for heavier workpieces, larger castings, steel structures and parts with more demanding cleaning requirements. Its stronger blasting energy helps improve cleaning efficiency in desanding, descaling, rust removal and surface preparation applications.

 

Compared with conventional steel shot, S330 and S390 ST Series Steel Shot offer better toughness, lower breakage, reduced dust generation and longer service life. They are suitable for automatic shot blasting machines where stable abrasive quality, controlled operating cost and consistent surface treatment results are required.

Manufacturing Process

ST Series Steel Shot is manufactured through raw material inspection, medium-frequency melting, chemical composition testing, centrifugal atomizing, drying, sizing, cleaning, shape selection, secondary quenching, tempering, fine screening and packaging.

The core advantage of ST Series Steel Shot comes from its secondary quenching process. After the steel shot is formed and preliminarily screened, it undergoes an additional quenching treatment to improve internal structure stability, hardness uniformity, toughness and impact resistance. This process helps reduce breakage and dust generation during repeated blasting cycles.

After secondary quenching, the steel shot is tempered to reduce internal stress and enhance durability. Through strict screening and quality inspection, ST Series Steel Shot delivers stable blasting performance, longer service life and consistent surface treatment quality for high-end shot blasting applications.

st steel shot production process with secondary quenching

Advantages

 

1. Stronger Impact Force for Medium to Heavy-Duty Blasting

S330 and S390 ST Series Steel Shot are designed for applications that require higher impact energy than smaller steel shot sizes. S330 provides a balanced cleaning effect for medium castings, forged parts and machinery components, while S390 delivers stronger impact force for heavier castings, steel structures and workpieces with tougher surface contamination.

 

2. Secondary Quenching for Better Toughness and Wear Resistance

The ST Series secondary quenching process improves the internal structure, toughness and impact fatigue resistance of the steel shot. Compared with ordinary steel shot, S330 and S390 ST Series Steel Shot are less likely to break during repeated blasting cycles, helping reduce abrasive consumption and maintain stable blasting performance.

 

3. Lower Breakage, Less Dust and More Stable Operating Conditions

Better particle toughness helps reduce broken abrasive particles and dust generation during continuous shot blasting. This supports a cleaner abrasive mix, improves separator efficiency and helps reduce unnecessary wear on shot blasting machines, especially in automatic blasting lines.

 

4. Efficient Cleaning with Controlled Surface Preparation

S330 and S390 ST Series Steel Shot provide efficient removal of sand residues, rust, oxide scale and surface impurities while helping maintain a controlled surface profile. They are suitable for casting cleaning, forging cleaning, desanding, descaling, rust removal and surface preparation before painting or coating.

Steel Shot Consumption in Casting and Foundry Applications
Stainless Steel Plate Surface Treatment Steel Shot Consumption
Abrasive Consumption Rate for Ship Plate Surface Preparation

Specifications

Parameter Specification
Product Type & Size S330 0.71 – 1.40 mm
S390 0.85 – 1.70 mm
Chemical Composition Carbon 0.985 (0.80 - 1.20%)
Manganese 0.859 (0.60 - 1.20%)
Silicon 0.768 (0.40 - 1.00%)
Sulfur 0.019 (<0.05%)
Phosphorus 0.022 (<0.05%)
Density > 7.5 g/cm³
Hardness 45-52 HRC (Customization available)
Ervin Life 3010 (2800 - 3200)
ISO 11124.3 SS-2.8 SS-2.4 SS-2.0 SS-1.7 SS-1.4 SS-1.2 SS-1.0 SS-0.8 SS-0.7 SS-0.6 SS-0.5 SS-0.4 SS-0.3
mesh mm Steel Shot Size Specifications- Max&Min Cumulative Percentages Allowed on Corresponding Test Sieves
4  4.75                          
5 4.00                          
6 3.35 ALL Pass                        
7 2.80   ALL Pass                      
8 2.36 90%Min   ALL Pass                    
10 2.00 97%Min 85%Min   ALL Pass ALL Pass                
12 1.70   97%Min 85%Min   5%Max ALL Pass              
14 1.40     97%Min 85%Min   5%Max ALL Pass            
16 1.18       97%Min 85%Min   5%Max ALL Pass          
18 1.00         96%Min 85%Min   5%Max ALL Pass        
20 0.85           96%Min 85%Min   10%Max ALL Pass      
25 0.71             96%Min 85%Min   10%Max ALL Pass    
30 0.60               96%Min 85%Min   10%Max ALL Pass  
35 0.50                 97%Min     10%Max  
40 0.425                   85%Min     ALL Pass
45 0.355                   97%Min 85%Min   10%Max
50 0.300                     97%Min 80%Min  
80 0.180                       90%Min 80%Min
120 0.125                         90%Min
SAE J444-2017 S-930 S-780 S-660 S-550 S-460 S-390 S-330 S-280 S-230 S-170 S-130 S-110 S-70

Applications

Aerospace

Aircraft engine blades, shafts and gears; aircraft structural parts, landing gear, and critical wing sections.

Automotive & New Energy Vehicles

Transmission gears, drive shafts, suspension springs, and key e-drive system components.

Wind Power & Energy Equipment

Gearbox components, main shafts, bearings, and heavy-duty structural parts.

Construction Machinery & Heavy Equipment

High-strength steel structural parts, welded components, and heavy-duty transmission parts.

Precision Casting & Advanced Manufacturing

High-precision castings, molds, and mechanical components.

S330 and S390 ST Series Steel Shot are widely used for medium to heavy-duty surface cleaning, casting cleaning, desanding, rust removal, descaling and surface preparation before painting or coating. These secondary-quenched steel shot grades are suitable for medium and heavy castings, forgings, steel parts, automotive components, machinery parts, heat-treated parts, welded components and steel structure workpieces.

S330 ST Series Steel Shot is suitable for applications that require a balanced cleaning effect and controlled surface finish, such as medium casting cleaning, machinery component cleaning and general steel surface preparation. S390 ST Series Steel Shot provides stronger impact force and is more suitable for heavier workpieces, thicker oxide scale and more demanding blasting conditions.

 

With stable hardness, improved toughness and lower breakage, S330 and S390 ST Series Steel Shot are widely used in foundries, forging plants, machinery manufacturing, automotive parts production and metal surface treatment industries where consistent cleaning efficiency, reduced dust generation and reliable blasting performance are required.

Packaging

 
steel drums

Metallic Cans / Cartons

12.5 kg or 25 kg units on 500 kg or 1,000 kg pallets.

 
bags

Bags

20 kg or 25 kg bags on 500 kg or 1,000 kg pallets.

▪Customized packaging available.▪

Frequently Asked Questions

What are S330 and S390 ST Series Steel Shot mainly used for?

S330 and S390 ST Series Steel Shot are mainly used for medium to heavy-duty shot blasting applications, including casting cleaning, forging cleaning, desanding, descaling, rust removal and surface preparation before painting or coating. S330 is suitable for medium castings, machinery components, automotive parts and general steel workpieces, while S390 provides stronger impact force for heavier castings, steel structures and workpieces with thicker scale or more demanding cleaning requirements.

Why choose ST Series Steel Shot instead of ordinary steel shot?

ST Series Steel Shot is processed by secondary quenching, which helps improve internal structure stability, toughness and wear resistance. Compared with ordinary steel shot, it can help reduce breakage, lower dust generation and maintain more stable blasting performance during repeated use. For medium-duty blasting, S330 and S390 ST Series Steel Shot can help customers improve cleaning efficiency and reduce abrasive consumption.

Hot tags :

S330 Cast Steel Shot

S390 Steel Shot Abrasive

S330 Steel Blasting Media

Wholesale High Quality Cast Steel Shot

Premium Steel Shot Blasting Media

High Performance Steel Shot Supplier

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