EDM Graphite

• Carbon Content: High-Carbon
• Grade: Industrial Grade
• Forming Way: Molded Graphite
• Crystal Morphology: Compact Crystalline Graphite
• Type: EDM Graphite Blocks
• Composition: High Purity
• Model NO.: xrd-7k, xrd-8k, xrd-7w, xrd-8w, xrd-5r, xrd-10w
• Transport Package: Standard Export Package
• Specification: more than 99.99% carbon content
• Origin: China
• HS Code: 3801100090
• Production Capacity: 5000ton/Year

Product Description

EDM graphite

Features:
1.Stable and reasonable price:
The price of graphite material only costs 15% of a cooper electrode with the same volume electrode. At present, graphite has come a hot material for EDM application. Compared withe graphite material, its cost is lower and more stable.
2.Easier cutting
Graphite has the excellent mechanical machining properties. The mechanical machining speed of graphite electrode is 2-3 times more than cooper electrode. Meanwhile, graphite processing does not need to worry about burr problem.
3.Lower thermal expansion coefficient
The melting point of cooper is 1080ºC and graphite is 3650ºC. The CTE of graphite is only 1/30 of cooper. It is very stable even at very high temperature. Even in the processing of platinum electrode, the graphite electrode has obvious advantages.
4.Lighter weight and lower density
The density of graphite is usually 1.7-1.9g/cm3 (the density of cooper is 4-5 times of graphite). Compared with cooper electrode, the graphite electrode will induce the mechanical load during this process and is more suitable for the application of large mold.
5.Excellent cutting and machining
Graphite has a low volume design compared to metallic materials. It has excellent machining performance.
6.Super adhesive effect
The crushed stone ink can be bonded with a binder,which can save the time and material costs.
7.Excellent resistivity
Resistivity (ER) determines the resistanceh  of the flow of current to the material. Lower resistivity means better conductivity.
8.High purity graphite molding also has excellent characteristics such as EDM applications:
-Uniform Granularity
-High bending
-High hardness
-Corrosion resistant






Properties:
The granularity of EDM graphite ranges from 2 microns to 20 microns. Our graphite products for EDM have good properties and physical and chemical characteristics that match those of EDM. In order to facilitate the customer to choose the most suitable grade for use. Our most popular specifications and physical and chemical indicators of EDM graphite blocks are as follows:
Isostatic Graphite

Product grade

volume density

Electrical resistivity

Hardness

Bending strength

Compressive strength

Porosity

Ash

Purified ash

Particle size

g/cm3

μΩm

HSD

Mpa

Mpa

%

PPM

PPM

μm

xrd-7k

1.83

11-14

67

50

110

12

1000

50

8

xrd-8k

1.86

10-14

72

55

120

12

1000

50

6

xrd-7w

1.85

11-13

65

51

115

12

/

50

10

xrd-8w

1.91

11-13

70

60

135

11

/

50

10

Size (mm)

Ф125*1100

Ф150*2000

Ф180*2000

Ф220*1100

Ф280*1100

Ф300*1100

Ф330*1100

Ф350*1100

Ф380*1100

Ф450*1100

Φ520*520

Φ560*420

Φ560*520

Φ600*600

Φ650*620

Φ700*690

Φ780*700

400*300*400

690*390*190

1000*500*300

1000*500*350

1000*520*160

1200*500*300

1230*500*400

1300*520*160

1400*520*520

1800*500*300

1800*650*300

High purity molded graphite

Product grade	volume density	Electrical resistivity	Hardness	Bending strength	Compressive strength	Porosity	Ash	Purified ash	Particle size
	g/cm3	μΩm	HSD	Mpa	Mpa	%	PPM	PPM	μm
xrd-5r	1.68	13	51	38	86	18	500	50	13-15
xrd-10w	1.76	12-14	56	41	85	16	500	50	12
xrd-40w	1.72	12-16	52	40	86	18	1000	50	8
xrd-40d	1.68	12-16	50	40	82	18	1000	50	10-12
xrd-50d	1.78	12-16	55	45	88	13	900	50	10-12

 

size(mm)
Φ106*110	Φ106*250	Φ130*160	Φ130*250	Φ180*200	Φ180*250	Φ225*250
Φ250*300	Φ240*410	Φ300*250	Φ330*250	Φ350*220	Φ350*250	Φ450*380
Φ480*380	210*210*60	210*210*90	300*200*120	300*250*113	310*310*150	340*310*113
350*280*120	350*280*150	350*280*160	350*280*180	380*300*95	380*300*105	390*120*120
400*310*130	400*310*140	400*310*150	400*310*160	400*310*180	430*130*105	430*130*130
440*260*130	440*260*140	450*150*150	450*200*150	450*200*210	450*350*240	500*300*200
550*150*250	530*400*200	570*400*200	580*500*200	650*210*140	800*300*200	900*210*230

Application:
-Mould
-Larger electrode sizes are required for forging molds
-The surface needs a good finish
-Die casting mould