Produced by Kyoritsu Gokin Co., Ltd.& Everloy Shoji Co., Ltd.

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Material and property list

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Material and property (Typical figures)

■ For wear-resistance and impact resistance tools

Our gradeH1G1G2G3G4G5TB6TB7G8
WC grain size
[μm]		1.0-2.51.0-2.51.0-2.51.0-2.52.5-5.02.5-5.05.0(or more)5.0(or more)5.0(or more)
Cobalt content
[%]		66681013152122
Density
[×103kg/m3]
{g/cm3}		14.814.915.014.814.614.313.913.313.3
Hardness　HV1900175016101480136012501060 950 860
Hardness　HRA93.092.091.090.089.088.086.584.582.5
Fracture toughness value
[GPa]		1.92.02.52.72.93.23.13.02.6
Fracture toughness value*4
[MPa･m1/2]		8.91012182226-*6-*6-*6
Tensile strength*5
[GPa]		1.01.01.31.41.51.61.61.51.3
Compressing strength
[GPa]		6.15.75.45.04.74.33.93.33.2
Young's modulus
[GPa]		630620610590570540530480470
Poisson's ratio0.210.210.210.210.220.220.230.230.23
Thermal expansion coefficient
[×10-6/K]		4.74.74.75.05.35.65.86.66.7
Thermal conductivity
[W/(m･K)]		808080757571676359
Impact strength
[kJ/m2]		202328364456648385

■ Fine grain cemented carbide

Our gradeKD05KD10KD20KD30KD40KD50
WC grain size
[μm]		1.0(less than)1.0(less than)1.0(less than)1.0(less than)1.0(less than)1.0(less than)
Cobalt content
[%]		81013161928
Density
[×103kg/m3]
{g/cm3}		14.714.514.213.913.612.9
Hardness　HV92.091.090.089.088.084.5
Hardness　HRA17501610148013601250950
Fracture toughness value
[GPa]		3.23.43.73.73.73.0
Fracture toughness value*4
[MPa･m1/2]		121316192230
Tensile strength*5
[GPa]		1.61.71.91.91.91.5
Compressing strength
[GPa]		6.15.95.34.94.43.0
Young's modulus
[GPa]		600580550520490400
Poisson's ratio0.210.220.220.230.230.25
Thermal expansion coefficient
[×10-6/K]		5.05.35.66.06.37.3
Thermal conductivity
[W/(m･K)]		757571676354
Impact strength
[kJ/m2]		242837485987

■ Cemented carbide for electromagnetic steel sheet processing

Our gradeEX20EW10EW25EW40
WC grain size
[μm]		2.5-5.01.0-2.51.0-2.51.0-2.5
Cobalt content
[%]		671115
Density
[×103kg/m3]
{g/cm3}		14.914.814.313.9
Hardness　HV90.091.089.588.0
Hardness　HRA1480161014201250
Fracture toughness value
[GPa]		3.03.53.53.5
Fracture toughness value*4
[MPa･m1/2]		19152229
Tensile strength*5
[GPa]		1.51.751.751.75
Compressing strength
[GPa]		5.25.14.74.0
Young's modulus
[GPa]		620610570530
Poisson's ratio0.210.210.220.23
Thermal expansion coefficient
[×10-6/K]		4.74.95.45.8
Thermal conductivity
[W/(m･K)]		80777368
Impact strength
[kJ/m2]		----

■ For EDM

Our gradeCrack-resistance
A10W		Anti-corrosive
WD20		Corrosion-resistance
ME40
WC grain size
[μm]		1.0-2.51.0(less than)2.5-5.0
Cobalt content
[%]		913*112
Density
[×103kg/m3]
{g/cm3}		14.514.114.1
Hardness　HV91.090.588.0
Hardness　HRA161015401250
Fracture toughness value
[GPa]		3.73.73.2
Fracture toughness value*4
[MPa･m1/2]		131626
Tensile strength*5
[GPa]		1.91.91.6
Compressing strength
[GPa]		6.05.34.1
Young's modulus
[GPa]		590550560
Poisson's ratio0.220.220.22
Thermal expansion coefficient
[×10-6/K]		5.25.65.5
Thermal conductivity
[W/(m･K)]		757171
Impact strength
[kJ/m2]		293752

■ ltrafine grain cemented carbide

Our gradeEF01EF05EF10EF20
WC grain size
[μm]		1.0(less than)1.0(less than)1.0(less than)1.0(less than)
Cobalt content
[%]		8101318
Density
[×103kg/m3]
{g/cm3}		14.514.314.013.6
Hardness　HV94.0*393.092.090.0
Hardness　HRA2000190017501480
Fracture toughness value
[GPa]		3.73.74.04.0
Fracture toughness value*4
[MPa･m1/2]		9.19.11013
Tensile strength*5
[GPa]		1.91.92.02.0
Compressing strength
[GPa]		6.56.56.45.4
Young's modulus
[GPa]		600580550490
Poisson's ratio0.210.220.220.23
Thermal expansion coefficient
[×10-6/K]		5.05.35.66.3
Thermal conductivity
[W/(m･K)]		71716759
Impact strength
[kJ/m2]		17212544

■ Non-magnetic and anti-corrosive cemented carbide

Our gradeKN10KN20KN30KN40
WC grain size
[μm]		1.0(less than)1.0(less than)1.0(less than)1.0(less than)
Cobalt content
[%]		9*212*214*216*2
Density
[×103kg/m3]
{g/cm3}		14.514.213.913.7
Hardness　HV91.090.089.088.0
Hardness　HRA1610148013601250
Fracture toughness value
[GPa]		3.33.63.63.8
Fracture toughness value*4
[MPa･m1/2]		11141720
Tensile strength*5
[GPa]		1.61.81.81.9
Compressing strength
[GPa]		-5.0--
Young's modulus
[GPa]		-550--
Poisson's ratio-0.22--
Thermal expansion coefficient
[×10-6/K]		5.15.55.86.0
Thermal conductivity
[W/(m･K)]		53474238
Impact strength
[kJ/m2]		-34--

■ Others

Our gradeFor stainless steel
KX01		For stamping of pure iron and copper
MC20		Non-magnetic and anti-corrosive
SS13		Non-magnetic and anti-corrosive
SS15		For cutting tools
KW3
WC grain size
[μm]		1.0(less than)2.5-5.01.0(less than)1.0(less than)1.0-2.5
Cobalt content
[%]		13*16146.5
Density
[×103kg/m3]
{g/cm3}		14.014.914.214.614.6
Hardness　HV92.590.0--91.0
Hardness　HRA18201480245021001680
Fracture toughness value
[GPa]		4.02.81.02.02.5
Fracture toughness value*4
[MPa･m1/2]		10195.48.412
Tensile strength*5
[GPa]		2.01.40.51.01.3
Compressing strength
[GPa]		6.45.2---
Young's modulus
[GPa]		550620---
Poisson's ratio0.220.21---
Thermal expansion coefficient
[×10-6/K]		5.64.7---
Thermal conductivity
[W/(m･K)]		6780---
Impact strength
[kJ/m2]		2530---

The above data represent typical figures, not guaranteed figures.
It can change without a prior notice.

  • *1 Nickle is comprised partially.
  • *2 Value of grade KN20 indicates the amount of Nickel.
  • *3 The number of shows the reduced value from HV.
  • *4 Fracture toughness value is measured using IF method of JISR1607.
  • *5 The properties after tensile strength are reference value from documents.
  • *6 The value is higher than grade G5.

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