Aviation Steel Shot is a high-performance shot peening medium manufactured in compliance with AMS 2431 aerospace materia
1 / 7Aviation Steel Shot AMS 2431 | Aerospace-grade shot peening media, hardness 45-52 / 55-62 HRC, AMS 2431/1 & AMS 2431/2 compliant. Introduces uniform residual compressive stress to enhance fatigue life & stress corrosion resistance. Approved by Boeing/Airbus/GE standards.
Aviation Steel Shot is a high-performance shot peening medium manufactured in compliance with AMS 2431 aerospace material specifications. Produced from premium high-carbon steel through centrifugal atomization, it yields spherical or near-spherical particles with precisely controlled hardness, uniform size distribution, and exceptional durability. The two principal grades — AMS 2431/1 (standard hardness) and AMS 2431/2 (high hardness) — are purpose-built for aerospace precision shot peening, introducing uniform residual compressive stress into the component surface layer to significantly enhance fatigue life and stress corrosion cracking resistance. They are rarely used for general rust removal blasting (for which chilled iron grit or standard steel grit is preferred).
| Parameter | AMS 2431/1 (ASR Standard) | AMS 2431/2 (ASH High Hardness) |
|---|---|---|
| Hardness | 45–52 HRC | 55–62 HRC |
| Characteristic | Good toughness, soft impact — unlikely to damage substrate | Higher impact energy, deeper compressive stress layer |
| Substrate Hardness Limit | Unrestricted (mainly low/medium hardness substrates) | Only for substrates ≥ 50 HRC (quenched/carburized high-strength parts) |
Specification explicitly mandates: only for substrates ≥ 50 HRC (quenched/carburized high-strength metals)
| System | Typical Components |
|---|---|
| Airframe | Frame beams, stringers, splice joints, weld seam strengthening |
| Wings | Wing spars, skin peen forming, flap tracks, attachment lugs |
| Landing Gear | Struts, actuators, axles, lock mechanisms, buffer components |
| Aero-Engine | HP/LP blades, blisks, shafts, gears, casings, seals |
| Element | Content Range |
|---|---|
| C | 0.80–1.20% |
| Mn | 0.60–1.20% |
| Si | 0.40–1.00% |
| S | ≤ 0.05% |
| P | ≤ 0.05% |
| Fe | Balance |
| Average Hardness (AMS 2431/1) | 45–52 HRC |
| Average Hardness (AMS 2431/2) | 55–62 HRC |
| Microstructure | Uniform tempered martensite |
| Density | 7.8 g/cm³ |
| Shape | Spherical / Near-spherical |
After primary centrifugal quenching, we apply a second hardening cycle. This creates a denser microstructure, significantly inhibiting carbon deviation. The result: 1.3× longer service life, lower breakage rate, less dust, better elasticity and faster cleaning speed.
8-step controlled production — from raw steel to finished abrasive media, every stage is engineered for consistency.
Electric Arc Furnace
Adjust steel composition to reduce harmful sulfur and phosphorus content.
Ladle Refining
Further purify molten steel to ensure superior material quality.
Centrifugal Casting
High-speed centrifugal forming controls shape quality and minimizes physical defects.
Defect Separation
Remove hollow or deformed particles to improve shot density and uniformity.
Secondary Hardening
Double quenching refines grain structure, enhancing toughness and inhibiting carbon deviation.
Precision Heat Treatment
Precise temperature and time control achieve optimal hardness uniformity across batches.
Grit Production
Unique crushing process improves grit fullness and angularity while minimizing internal cracks.
SAE J444 Grading
Precision screening guarantees every batch meets American SAE-J444 standard.
Every production batch is verified by 5 types of precision instruments before leaving the factory. Test standards aligned with ASTM E92, GB/T4340.2 and ISO 6507-2.
Friction-free spindle with automated testing. Precision micrometer system eliminates human error. Compliant with ASTM E92, GB/T4340.2 and ISO 6507-2.
Identifies and analyzes the microstructure of metals and alloys. Validates raw material quality and verifies post-treatment microstructure integrity.
Detects Si, Mn, P, Cr, Ni, Mo, Cu, Ti in cast iron, stainless steel, carbon steel and alloy steel. Fast and accurate multi-element screening.
Optical-mechanical-electrical-computer integrated system. Wide measuring range, strong anti-interference, accurate and reliable C/S determination.
Simulates real blasting conditions at 80 m/s centrifugal speed with 200g samples. Sieving-recycling loop measures actual shot durability under production stress.
28 specifications covering all hardness grades for aerospace applications
AMS2431 aviation steel shot gallery — 4 specs × 3 viewing angles, revealing aerospace-grade quality in depth.
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Get Free QuoteSteel shot is a spherical metallic abrasive manufactured through atomization. It's primarily used for shot blasting, shot peening, and surface preparation. It removes scale, rust, and old coatings while enhancing metal surface fatigue strength.
→ View Steel Shot S70-S780 product specs & selection guide
Steel shot is spherical, ideal for precision cleaning and shot peening. Steel grit is angular with stronger cutting force, suitable for aggressive rust removal and surface profiling. Choose based on your workpiece requirements.
Steel Shot · Steel Grit · Deep-dive comparison
