HGM High-Strength Series
Five grades with thicker, stronger microsphere walls at comparable particle sizes — engineered to survive sustained high pressure without crushing, for deep-sea buoyancy and oilfield cementing.
Grade Comparison
AM-H25HS to AM-H60HS. At a matched particle size, these grades hold roughly double the test pressure of their Common Series counterparts.
| Model | Test Pressure (MPa/psi) | Tap Density (g/cm³) | True Density (g/cm³) | Thermal Cond. (W/m·K) | D10 (μm) | D50 (μm) | D90 (μm) |
|---|---|---|---|---|---|---|---|
| AM-H25HS | 13.8 / 2000 | 0.15 | 0.25 | 0.051 | 23 | 43 | 73 |
| AM-H30HS | 27.6 / 4000 | 0.18 | 0.30 | 0.056 | 19 | 38 | 65 |
| AM-H38HS | 55.2 / 8000 | 0.22 | 0.38 | 0.065 | 18 | 37 | 66 |
| AM-H46HS | 110 / 16000 | 0.28 | 0.46 | 0.078 | 16 | 35 | 62 |
| AM-H60HS | 124 / 18000 | 0.36 | 0.60 | 0.093 | 13 | 28 | 51 |
Compressive strength test per JC/T 2285-2014 or Q/TIPC-J01-2020. Tap density per GB/T 31057.1-2014. True density per JC/T 2285-2014 or GB/T 21782.2-2008. Thermal conductivity per ASTM D5930-01. Particle size per GB/T 19077-2016.
How This Series Differs from Common Series
At a matched particle size, High-Strength grades tolerate roughly double the test pressure of their Common Series counterparts — for example, AM-H30HS holds to 4,000psi versus AM-H30's 2,000psi. This comes from a thicker microsphere wall construction, which is what makes the series suitable for sustained deep-water pressure or the mechanical stresses of oilfield cementing, where a standard grade would risk crushing under load.
Applications
Deep-Sea Buoyancy
Used as a filler in syntactic foam buoyancy materials for underwater equipment, submersibles, and subsea cables, where sustained hydrostatic pressure at depth requires a microsphere that won't collapse.
Oilfield Cementing
As a lightweight cement slurry additive, reduces slurry density while withstanding downhole pressure during cementing operations.
Aerospace & High-Performance Composites
Where non-metallic aircraft components need both weight reduction and structural resilience under load.