Shot Blasting Abrasive

Shot blasting is an essential procedure in various industries for surface preparation or cleaning metal and other surfaces. To understand shot blasting abrasive better, let’s delve into its various aspects, from the types of abrasives used to its applications.

What is Shot Blasting?

Shot blasting is a process wherein abrasive media, often called “blasting media” or “blast media,” is propelled at high velocity onto a surface. This action cleans or prepares the surface for coatings, painting, or other treatments.

Types of Shot Blasting Abrasive:

  1. Steel Shot & Steel Grit: Durable and recyclable, steel abrasives are used for blasting heavy-duty parts, offering a smooth finish.
  2. Glass Beads: These provide a bright, satin-like finish, ideal for soft metals.
  3. Aluminum Oxide: Known for its hardness and aggressive cutting properties, it’s suitable for surface etching.
  4. Walnut Shells: A softer abrasive, perfect for delicate parts and ideal for removing paint without damaging the underlying surface.
  5. Garnet: Natural and sharp, garnet is used for both blasting and water jet cutting.
  6. Sand: Once a common abrasive, its use has diminished due to health concerns, but it’s still applied in certain applications.

Factors to Consider When Choosing Blasting Media:

  1. Surface Material: The hardness of the surface material determines the abrasive type.
  2. Desired Finish: Some abrasives, like glass beads, offer a polished finish, while others, like steel grit, provide a rougher texture.
  3. Coating or Paint Removal: Materials like walnut shells are great for stripping away paint without harming the base material.
  4. Safety & Environmental Impact: Using biodegradable or less harmful abrasives can be safer for operators and the environment.
  5. Cost & Availability: Price and availability can often dictate the choice of abrasive, especially for large projects.

Shot Blasting (Sand Blasting) Abrasives

Given the wide range of blasting and applications the selection of loose abrasives available is also quite extensive.

SS&S Co. offers a full range of sizes in the following products:

  • Aluminum Oxide
  • Silicon Carbide
  • Glass Beads
  • Corn Cob & Walnut Shell
  • Garnet
  • Baking Soda (“Soda Blasting”)
  • Steel Shot & Steel Grit

Many of the above abrasive are available from stock ready for immediate shipping.

Shot Blasting Abrasive

Steel Shot & Grit

Click on image to see full chart.

Stainless Steel Shot & Grit

GRITTAL

GRITTAL is the economic alternative to mineral grit abrasives and fulfills all requirements concerning blasting performance and a corrosion-free surface finish.

GRITTAL offers additional clear economical and environmental advantages. The extremely high durability of this rust-free stainless steel grit reduces the amount of abrasive consumption by a factor of 30 – 100 and thereby also minimizes the amount of waste that is generated.

The durability of GRITTAL results in a consistent work mix, constant roughness values and guarantees a quality adhesion for an ensuing coating.

GRITTAL’s dist-free characteristic allows for an excellent vision while blasting and helps to better control the blast process.

GRITTAL is successfully used in blast rooms and also in centrifugal wheel blast machines.

GRITTAL SCREEN ANALYSIS

Rust proof, angular chromium alloy grit (hardened and crushed)
Chemical composition: C = 2%, Cr = 30%
Microstructure: Martensite with chromium carbides
Hardness: GH ~750, GM ~640
Apparent density: = 4.1 kg/dm3

CHRONITAL

CHRONITAL is used in all applications where non-rusting materials such as aluminum, zinc, stainless steel, brass, bronze, etc. are blasted.

CHRONITAL’s large spectrum of grain sizes makes it well suited to cleaning, de-burring, hardening and surface finishing of all types of castings, forgings, profiles, wire and welded structural parts, without the possibility that rust could discolor the bright surface due to ferritic dust.

CHRONITAL distinguishes itself by having a high percentage of spherical grains and by its compactness. The end result is low consumption, high performance and low machine wear.

The danger of developing ugly rust spots on the surface of blasted concrete and granite stones due to the remains of ferritic particles is ruled out. Using CHRONITAL on smooth and textured pavers brings out the stones fascinating optics in a favorable way.

CHRONITAL SCREEN ANALYSIS

Stainless steel, rust proof, spherical.
Chemical composition: C = 0.17%, Cr = 18%, Ni = 10%, Si = 1.8%, Mn = 1.2%
Microstructure: Austenitic
Hardness: on delivery = 300 HV (~30 HRC), as operating mix = 450 HV (~45 HRC)
Apparent density: = 4.7 kg/dm3


Importance of Equipment & Safety:

  • Blast Hoses & Guns: Quality hoses and guns ensure consistent pressure and abrasive flow.
  • Valves: Ensure that the system has good pressure control and safety cutoffs.
  • Operator Safety: Operators should wear appropriate protective equipment, including face shields, gloves, and body protection.

Buying and Storing Abrasives:

  1. Shop and Store: Many companies offer a range of blasting media, often categorized by type, size, and application. It’s crucial to store abrasives in a dry environment to prevent clumping or degradation.
  2. Ordering & Savings: Buying in bulk can lead to cost savings. However, ensure the storage conditions are optimal.
  3. Customer Service: Opt for companies that provide sound advice, helping customers choose the right abrasive for their job.

Conclusion

Shot blasting is a process wherein abrasive media, often called “blasting media” or “blast media,” is propelled at high velocity onto a surface. This action cleans or prepares the surface for coatings, painting, or other treatments.


Feel free to contact us to discover how we can optimize your cleaning processes with our state-of-the-art vibratory finishing equipment and technology.

For questions or to order call: (716) 288-7105