Material Classification Codes

• Major Class
• Material Characteristics Included
• Code Designaton

• Major ClassDensity
• Material Characteristics IncludedBulk density, loose
• Code DesignatonActual lbs/cu. ft.

• Major ClassSize
• Material Characteristics IncludedVery Fine: No. 200 sleve (.0029*) and under
• Code DesignatonA200

• Major ClassSize
• Material Characteristics IncludedVery Fine: No. 100 sleve (.0059*) and under
• Code DesignatonA100

• Major ClassSize
• Material Characteristics IncludedVery Fine: No. 40 sleve (.016") and under
• Code DesignatonA40

• Major ClassSize
• Material Characteristics IncludedFine: No. 6 sieve (.132") and under
• Code DesignatonB6

• Major ClassSize
• Material Characteristics IncludedGranular: 1/2" and under
• Code DesignatonC1/2

• Major ClassSize
• Material Characteristics IncludedGranular: 3" and under
• Code DesignatonD3

• Major ClassSize
• Material Characteristics IncludedGranular: 7" and under
• Code DesignatonD7

• Major ClassSize
• Material Characteristics IncludedGranular: 16" and under
• Code DesignatonD16

• Major ClassSize
• Material Characteristics IncludedLumpy: Over 16" to be specified (x = actual maximum size)
• Code DesignatonDx

• Major ClassSize
• Material Characteristics IncludedIrregular: Stringy, fibrous, cylindrical, slabs, etc.
• Code DesignatonE

• Major ClassFlowability
• Material Characteristics IncludedVery free flowing — flow function > 10
• Code Designaton1

• Major ClassFlowability
• Material Characteristics IncludedFree flowing — flow function > 4 and < 10
• Code Designaton2

• Major ClassFlowability
• Material Characteristics IncludedAverage flowability — flow function > 2 and < 4>
• Code Designaton3

• Major ClassFlowability
• Material Characteristics IncludedSluggish — flow function < 2
• Code Designaton4

• Major ClassAbrasiveness
• Material Characteristics IncludedMildly abrasive (Index 1-17)
• Code Designaton5

• Major ClassAbrasiveness
• Material Characteristics IncludedModerately abrasive (Index 18-67)
• Code Designaton6

• Major ClassAbrasiveness
• Material Characteristics IncludedExtremely abrasive (Index 68-416)
• Code Designaton7

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedBuilds up and hardens
• Code DesignatonF

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedGenerates static electricity
• Code DesignatonG

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedDecomposes (deteriorates in storage)
• Code DesignatonH

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedFlammability
• Code DesignatonJ

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedBecomes plastic or tends to soften
• Code DesignatonK

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedVery dusty
• Code DesignatonL

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedAerates and becomes fluid
• Code DesignatonM

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedExplosiveness
• Code DesignatonN

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedStickiness/adhesion
• Code DesignatonO

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedContaminable, affecting use
• Code DesignatonP

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedDegradable, affecting use
• Code DesignatonQ

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedGives off harmful toxic gas or fumes
• Code DesignatonR

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedHighly corrosive
• Code DesignatonS

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedMildly corrosive
• Code DesignatonT

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedHygroscopic
• Code DesignatonU

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedInterlocks, mats, or agglomerates
• Code DesignatonV

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedOils present
• Code DesignatonW

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedPacks under pressure
• Code DesignatonX

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedVery light and fluffy; may be windswept
• Code DesignatonY

• Major ClassMiscellaneous Properties or Hazards
• Material Characteristics IncludedElevated temperature
• Code DesignatonZ