GRAPHITE MATERIAL SELECTION GUIDE:
POCO
EDM - AF5
POCO's EDM - AF5 is the only graphite electrode material
available today with an average particle size of less than one micron.
This particle structure gives EDM - AF5 superior strength, provides
for the surface finished (7Ra), gives excellent metal removal rate,
and high resistance to wear.
Product Specification
Average particle size (microns) <1
Flexural strength (psi) 17,000
Compressive strength (psi) 27,000
Average apparent density (g/cm³) 1.80
Hardness (Shore) 87
Electrical resistivity (µ ohm) 680
Applications
• Fine detailed electrodes for engraving
• Hard to machine detail
• Delicate and fragile electrodes
• Various type threading electrodes
• Jobs requiring fine surface finishes
• Intricate molds and dies
EDM - 3
POCO's EDM -3 is an isotropic Ultrafine grain graphite which offers high
strength with outstanding wear and fine surface finish characteristics easliy
machined to thickness of 0.1MM or less.
Product Specification
Average particle size (microns) <5
Flexural strength (psi) 13,500
Compressive strength (psi) 21,500
Average apparent density (g/cm³) 1.81
Hardness (Shore) 76
Electrical resistivity (µ ohm) 540
Applications
• EDMing of fine detailed electrodes
• Punch & die sets
• Plastic injection molding
• Threading electrodes
• Use in aerospace metal cutting
EDM - C3
POCO's EDM - C3 is a high density graphite infiltrated with copper,
recommended where speed, wear and surface finish are important.
Unequalled for fragile electrodes, many EDM'ers choose this grade to
compenstate for operator inexperience or where poor flushing conditions exists.
Product Specification
Average particle size (microns) <5
Flexural strength (psi) 16,500
Compressive strength (psi) 30,000
Average apparent density (g/cm³) 3.05
Hardness (Shore) 67
Electrical resistivity (µ ohm) 120
Applications
Fine detailed electrodes where strength is critical
Threading electrodes
Aerospace applications
Plastic injection molds
Machining or carbide
Small hole drillling
EDM - 2
POCO's EDM - 2 is an isotropic Ultrafine grain graphite with hihg strength and
good wear characteristics recommended where good detail, wear resistance,
spped, and finish are desired. EDM - 2 is an excellent all purpose grade for
super alloys like titanium.
Product Specification
• Average particle size (microns) <5
• Flexural strength (psi) 10,000
• Compressive strength (psi) 18,000
• Average apparent density (g/cm³) 1.74
• Hardness (Shore) 73
• Electrical resistivity (µ ohm) 620
Applications
Aerospace applications
Fine - detailed electrodes
Extrusion dies
Minimum -Taper-cavities
Blind cavity work
Threading electrodes
EDM 1
POCO's EDM - 1 is the lowest priced Ultrafine grain graphite available from
POCO. In addition to providing good wear resistance, speed, and finish,
lower electrode fabrication costs are possible when larger electodes are required.
Product Specification
Average particle size (microns) <5
Flexural strength (psi) 7,500
Compressive strength (psi) 15,000
Average apparent density (g/cm³) 1.66
Hardness (Shore) 70
Electrical resistivity (µ ohm) 740
Applications
• Fabricating electrodes with less intricate detail
• Low wear roughing electrodes
• Extrusion die relief cutting
• High detail roughing electrodes
• Molds and dies
EDM - C200
POCO's EDM -C200 is a high density Superfine graphite infiltrated with
copper which offers excellent metal removal rates and good wear resistance.
EDM - C200 provides improved cutting stablitiy in poor flushing conditions.
EDM - C200 is an excellent material for cutting Aerospace alloys.
Product Specification
Average particle size (microns) <10
Flexural strength (psi) 13,000
Compressive strength (psi) 23,000
Average apparent density (g/cm³) 3.00
Hardness (Shore) 60
Electrical resistivity (µ ohm) 70
Applications
• Aerospace exotic metal cutting
• High quality roughing electrodes
• Die cast dies
• Forging dies
EDM - 200
POCO's EDM -200 is an isotropic Superfine particle graphite providing good
strength, surface finish, and wear resistance. Moderately priced EDM - 200
provides excellent repeatablitiy from electrode to electrode and from job to job.
Product Specification
Average particle size (microns) <10
Flexural strength (psi) 9,000
Compressive strength (psi) 16,000
Average apparent density (g/cm³) 1.82
Hardness (Shore) 64
Electrical resistivity (µ ohm) 480
Applications
• Forging dies
• Die cast dies
• Large blow molds
• High quality roughing electrodes
• Non-critical tolerance in larger electrodes
TOYO TANSO
GRADE TTK-4
Product Specification
Average particle size (microns) <5
Flexural strength (psi) / (MPa) 10,600/73
Compressive strength (psi) / (MPa) 19,600/135
Average apparent density (g/cm³) 1.78
Hardness (Shore) 72
Electrical resistivity (>µΩin) / (µΩcm) 551/1400
Applications
• Punch & die sets
• Plastic injection molds
• Threading electrodes
• Aerospace metal cutting
GRADE TTK-4C
Product Specification
Average particle size (microns) 4
Flexural strength (psi) / (MPa) 15,500/107
Compressive strength (psi) / (MPa) 28,000/193
Average apparent density (g/cm³) 2.90
Hardness (Shore) 60
Electrical resistivity (>µΩin) / (µΩcm) 100/254
Applications
• Burning into carbides
• Fine detailed electrodes
• Drilling of small holes
• Threading electrodes
• Aerospace applications
GRADE TTK-50
Product Specification
Average particle size (microns) 8
Flexural strength (psi) / (MPa) 8,700/60
Compressive strength (psi) / (MPa) 8,700/60
Average apparent density (g/cm³) 1.80
Hardness (Shore) 70
Electrical resistivity (>µΩin) / (µΩcm) 512/1300
Applications
• Forgin Dies
• Die Casting
• Large Plastic Injection Molds
• Threading electrodes
• Large Blow Molds
GRADE TTK-9
Product Specification
Average particle size (microns) <3
Flexural strength (psi) / (MPa) 13,300/92
Compressive strength (psi) / (MPa) 6,100/180
Average apparent density (g/cm³) 1.77
Hardness (Shore) 90
Electrical resistivity (>µΩin) / (µΩcm) 709/1,800
GRADE ISEM-2
Product Specification
Average particle size (microns) 10
Flexural strength (psi) / (MPa) 6,000/41
Compressive strength (psi) / (MPa) 12,100/83
Average apparent density (g/cm³) 1.78
Hardness (Shore) 55
Electrical resistivity (>µΩin) / (µΩcm) 433/1,100
GRADE ISEM-7
Product Specification
Average particle size (microns) 8
Flexural strength (psi) / (MPa) 7,400/51
Compressive strength (psi) / (MPa) 15,000/107
Average apparent density (g/cm³) 1.77
Hardness (Shore) 62
Electrical resistivity (>µΩin) / (µΩcm) 559/1,420
IBIDEN
EDX-7
Product Specification
Flexural strength (MPa) 95.0
Compressive strength (MPa) 125.0
Average apparent density (g/cm³) 1.82
Hardness (Shore) 68
Electrical resistivity (µΩcm) 1,700
EX-70
Product Specification
Flexural strength (MPa) 68.6
Compressive strength (MPa) 137.2
Average apparent density (g/cm³) 1.85
Hardness (Shore) 70
Electrical resistivity (µΩcm) 1,500
EX-60
Product Specification
Flexural strength (MPa) 80.0
Compressive strength (MPa) 140.2
Average apparent density (g/cm³) 1.80
Hardness (Shore) 62
Electrical resistivity (µΩcm) 1,300
EX-50
Product Specification
Flexural strength (psi) / (MPa) 8,532/58.8
Compressive strength (psi) / (MPa) 14,220/98.0
Average apparent density (g/cm³) 1.75
Hardness (Shore) 50
Electrical resistivity (µΩcm) 1,400
ET-10
Product Specification
Flexural strength (psi) / (MPa) 8,532/58.8
Compressive strength (psi) / (MPa) 14,220/98.0
Average apparent density (g/cm³) 1.75
Hardness (Shore) 50
Electrical resistivity (µΩcm) 1,400
ED-11
Product Specification
Flexural strength (psi) / (MPa) 8,532/58.8
Compressive strength (psi) / (MPa) 14,220/98.0
Average apparent density (g/cm³) 1.75
Hardness (Shore) 53
Electrical resistivity (µΩcm) 1,400
CARBONE OF AMERICA
ED-4
Product Specification
Flexural strength (psi) / (MPa) 14,220/98.0
Compressive strength (psi) / (MPa) 25,596/176.4
Average apparent density (g/cm³) 1.90
Hardness (Shore) 75
Electrical resistivity (µΩcm) 1,700
ELLOR+18
Product Specification
Flexural strength (psi) / (MPa) 6,500/45
Average apparent density (g/cm³) 1.76
Hardness (Shore) 55
Electrical resistivity (µΩcm) 1,500
ELLOR+20
Product Specification
Flexural strength (psi) / (MPa) 7,500/52
Average apparent density (g/cm³) 1.80
Hardness (Shore) 65
Electrical resistivity (µΩcm) 1,295
ELLOR+25
Product Specification
Flexural strength (psi) / (MPa) 8,400/58
Average apparent density (g/cm³) 1.82
Hardness (Shore) 65
Electrical resistivity (µΩcm) 1,400
ELLOR+30
Product Specification
Flexural strength (psi) / (MPa) 9,425/65
Average apparent density (g/cm³) 1.84
Hardness (Shore) 80
Electrical resistivity (µΩcm) 1,645
ELLOR+50
Product Specification
Flexural strength (psi) / (MPa) 11,000/76
Average apparent density (g/cm³) 1.86
Hardness (Shore) 80
Electrical resistivity (µΩcm) 1,525
|
Follow Us:
Facebook Twitter