ISO-9001-2015 Certified
MATERIAL SPECIFIAION
OHIO CARBON BLANK, INC.
** Material Specification Information **
 
MATERIAL
GRADE
PARTICLE
SIZE
APPARENT
DENSITY
SHORE
HARDNESS
ELECTRICAL
RESISTIVITY
FLEXURAL
STRENGTH
COMPRESSIVE
STRENGTH
TENSILE
STRENGTH
  (inches) (g/cm³) (shore) (Ω - inch) (lbs/in²) (lbs/in²) (lbs/in²)
UT-3 .00040 1.70 50 .00053 5,300 10,000 3,445
AR-6 .00047 1.76 55 .00050 6,500 14,300 4,225
AR-8 .00047 1.80 65 .00049 7,500 16,500 4,875
AR-12 .00031 1.78 63 .00053 7,540 15,400 4,901
AR-14 .00019 1.86 80 .00050 11,000 24,200 7,150
TTK-4 .00020 1.78 72 .00055 10,600 19,600 6,890
TTK-4C .00016 2.90 60 .00010 15,500 28,000 10,075
EDM-200 .00039 1.66 68 .00057 8,100 14,000 5,265
EDM-1 .00019 1.66 69 .00076 9,700 14,200 6,305
EDM-3 .00019 1.81 73 .00061 13,300 18,100 8,645
EDM-AF5 .00004 1.80 83 .00085 14,500 22,100 9,425
EDM-C3 .00019 3.05 66 .00013 20,300 28,350 13,195
  * Please note that UT-3 is a non-EDM grade material


GRAIN SIZES:
(ACCORDING TO POCO)
Angstrofine < 1μ
Ultrafine 1μ - 5μ
Superfine 5μ - 10μ
Fine 10μ - 15μ
Medium 15μ - 20μ
Coarse > 20μ
1 inch (in) = 25,400 micron (μ)