Blade Qualities

Name: Adamet Oy
Address: Koivulehdontie 2, Vantaa, 01510, FI
Telephone: +358 9 873 62 92

Steel grades, hardness and wear patterns

Grade comparison

Wear resistance and impact toughness of blade qualities
Grade	Hardness	Wear resistance	Impact toughness
1.2067	60 HRC	1×	38 J
D2	60 HRC	2×	28 J
M2	64 HRC	2.5×	27 J
M4	64 HRC	3.5×	18 J
ASP 2023	65 HRC	7.5×	38 J
ASP 2053	65 HRC	9×	41 J
Carbide	90 HRA	18×	4 J

Indicative figures. Wear resistance: 1.2067 = 1.

The standard choice is D2 (1.2379), 58–60 HRC.

Abrasive wear, the normal wear pattern.

Powder high speed steel ASP 2023, 64–66 HRC.

The edge is too hard for the load, or the blade sees impact or vibration.

Lower hardness or a tougher grade.

Foreign object, wrong setting or a loose mounting.

Check the setting and the mounting.

Overheating. Blue forms at about 300 °C, and a low-tempered steel has softened by then.

High speed steel M2 (1.3343), 62–65 HRC, or powder steel. They hold their hardness to about 550 °C, low-tempered D2 to about 200 °C.

Moisture, acidity or cleaning agents.

Stainless grade, 54–58 HRC.

Product	Grades and hardness
Upper knives, shear cutting	ASP 2023, ASP 2053, CPM 10V
Lower knives, shear cutting	Cemented carbide or powder steel
Crush cutting knives	D2
Core cutting knives	D2, HSS, ASP 2023, ASP 2053
Cross-cutting knives	D2 58–60 HRC, powder steel (ASP 2023, ASP 2053, CPM 10V) 64–66 HRC, cemented carbide
Granulator blades	D2 or powder steel, 56–59 HRC. Also with a carbide edge.
Crusher rotor knives and counter blades	D2 and special steels, 52–59 HRC. Inserts in HSS, ASP or cemented carbide.
Chipper blades	Chipper knife steel, 54–58 HRC
Veneer lathe blades	Tool steel for softwoods 58–60 HRC, hot work steel for hardwoods 54–58 HRC, HSS edge 64–66 HRC on a tough body
Hammer crusher parts	Hardox 400, 450, 500 and 600, hardness 400–600 HB

Grade	Delivery hardness	Composition, weight %	Use
Tool steel 1.2067 (102Cr6)	58–60 HRC	C 1.0 · Cr 1.5	When impact is a bigger risk than wear.
D2, 1.2379 (X153CrMoV12)	56–64 HRC	C 1.55 · Cr 12.0 · Mo 0.7 · V 1.0	The standard choice for most cutting work.
High speed steel M2 (HSS), 1.3343 (HS 6-5-2C)	62–65 HRC	C 0.90 · Cr 4.3 · Mo 5.0 · W 6.5 · V 1.9	When the blade runs hot.
High speed steel M4 (HSS), 1.3351 (HS 6-5-4)	63–65 HRC	C 1.30 · Cr 4.2 · Mo 4.5 · W 5.6 · V 4.0	When M2 wears too fast. Grinding is slower.
Powder high speed steel ASP 2023 (HS 6-5-3C)	64–66 HRC	C 1.28 · Cr 4.0 · Mo 5.0 · W 6.4 · V 3.1	Abrasive wear, when D2 is not enough.
Powder high speed steel ASP 2053 (HS 4-3-8)	64–66 HRC	C 2.48 · Cr 4.2 · Mo 3.1 · W 4.2 · V 8.0	Highly abrasive fillers: glass fibre, quartz, grit in recycled material. Grinding is slower.
Stainless steel	54–58 HRC	–	Chemical and food industry, wet environments and exposure to cleaning agents. Moderate wear resistance.
Cemented carbide	89–92 HRA	WC + Co	Pure abrasion in a rigid machine, typically the lower knife. Accurate setting, impact-free running.

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