An overview of our carbide grades


Here you will find the pefect carbid grade for each application. We produce the best possible metallurgical basics for the production of precision cutting tools and. Take advantage of the expertise of our team of experts in selecting the perfect carbide grade for your requirements.

Micro-Structure

Additional information about grade [K-40XF] K-40XF (DIN) For tough work piece materials in the hardness range <45HRC e.g. stainless and carbon steels, titanium- and nickel alloys. For low cutting speeds, high feed rates and interrupt cutting.
Additional information about grade [K-40 UF] K-40UF (DIN) For either tough work piece materials, titanium and heat-resistant alloys, austentic stainless steels, grey cast iron.
Additional information about grade [K-44 UF] K-44UF (DIN) Particularly suitable for: titanium and nickel based alloys, high alloyed steels, grey cast iron, composite materials. For high-speed cutting.
Additional information about grade [K-20 F] K-20F (DIN) Grey cast and chilled cast iron, hardened steels, aluminium alloys.
Additional information about grade [K-88-UF] K-88UF (DIN) For end milling applications in hard materials (45-70HRC) e.g. fully hardened and tempered steels, hard cast materials, tempered alloys.
Additional information about grade [K-6-UF] K-6UF (DIN) Composite materials (e.g. CFRP), graphite, hardened steels, grey cast iron.
Additional information about grade [K-55-SF] K-55SF (DIN) For highly wear-resistant materials, e.g. hardened steels, graphite, aluminium alloys, composite materials like Kevlar and CFRP. For high-speed cutting and for dry cutting.
Additional information about grade [K-5-UF] K-5UF (DIN) Composite materials (e.g. CFRP), graphite, fully hardened steels, grey cast iron.


HHT-Hartmetall offers for each application the optimal carbide in the best quality. We carry hard metal blanks as standard in different alloys and have an extensive range of carbide resistant stock.

Grade [K-10DIA]

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Milling cutters and drills for diamond coating


%Wc : 93
%Co : 6
% others : 1
Density g/cm³ : 14,8
Hardness HRA: 92,2
Hardness HV30 : 1790
Magn. saturation 4 πσ : 10,4
Coercitive field intensity in Ka/m : 22,5
Fatigue N/mm² : >3000
Porosity B / A / C : >02 / 02 / 02
Structure a / γ : fine / fine
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Grade [K-20 F]

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Grey cast, hard cast, tempered steel, hardenable aluminium alloys, plastics with filling materials, fibreglass-reinforced plastic and brake shoe linings.


%Wc : 92
%Co : 8
%others :
Density g/cm³ : 14,6
Hardness HRA: 92,5
Hardness HV30 : 1710
Magn. saturation 4 πσ : 15
Coercitive field intensity in Ka/m : 23
Fatigue N/mm² : >3200
Porosity B / A / C : >02 / 00 / 00
Structure a / γ : fine / fine
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Grade [K-40 UF]

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Titanium alloys, heat-proof alloys, austenitic stainless steels, grey cast iron, fibreglass-reinforced plastics.


%Wc : 90
%Co : 10
% others :
Density g/cm³ : 14,5
Hardness HRA: 92,3
Hardness HV30 : 1610
Magn. saturation 4 πσ : 16
Coercitive field intensity in Ka/m : 21
Fatigue N/mm² : >4000
Porosity B / A / C : <02 / 00 / 00
Structure a / γ : Ultra-fine / ultra-fine
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Grade [K-44 UF]

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Titanium alloys, heat-proof alloys, stainless steels, tempered steels, grey cast iron, fibreglass-reinforced plastics.


%Wc : 88
%Co : 12
%others :
Density g/cm³ : 14,05
Hardness HRA: 91,2
Hardness HV30 : 1680
Magn. saturation 4 πσ : 19
Coercitive field intensity in Ka/m : 26
Fatigue N/mm² : >4000
Porosity B / A / C : <02 / 00 / 00
Structure a / γ : Ultra-fine / ultra-fine
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Grade [K-55SF]

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High-wear-free materials, stainless steels, aluminium alloys, graphite, composite materials such as a Kevlar and fibreglass-reinforced plastic.


%Wc : 91
%Co : 9
others :
Density g/cm³ : 14,4
Hardness HRA: 93,9
Hardness HV30 : 1920
Magn. saturation 4 πσ : 14
Coercitive field intensity in Ka/m : 39
Fatigue N/mm² : >4000
Porosity B / A / C : <02 / 00 / 00
Structure a / γ : Super fine / super fine
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Grade [G-20]

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High wear resistance with average ductility. Profile tools, rod drawing tools, powder press tools, cold rolling


%Wc : 88,5
%Co : 11,5
%others :
Density g/cm³ : 14,2
Hardness HRA: 88
Hardness HV30 : 1300
Magn. saturation 4 πσ : 12
Coercitive field intensity in Ka/m : 21
Fatigue N/mm² : >2500
Porosity B / A / C : <02 / 00 / 00
Structure a / γ : Medium / medium
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