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What is the toughness of high-speed steel sharp edged knives
The toughness of high-speed steel sharp edged knives is characterized by moderate to high toughness, strong impact resistance, and the edge is not easily cracked. It achieves an excellent balance between hardness and toughness, which is one of its core advantages. The following is the official script explanation:Sources：www.hncsjx.cn | PublishDate：2026.03.02
1、 Core resilience indicators (official statement)
Bending strength: The bending strength of general-purpose high-speed steel (such as M2, W6Mo5Cr4V2) after heat treatment is about 3.0-3.5 GPa, significantly higher than that of hard alloys.
Impact toughness: It has good resistance to impact and chipping, and is not prone to brittle fracture under intermittent cutting and vibration conditions.
Edge strength: Although sharp edged edges are thin, the toughness of high-speed steel can effectively resist cutting impacts, reducing the risk of chipping and rolling edges.
2、 Resilience advantage (official script)
Reliable impact resistance: Compared to superhard tools such as hard alloys and ceramics, high-speed steel has 3-5 times higher toughness and stronger stability under impact conditions such as milling, planing, and tapping.
Good adaptability to sharp corners: It can grind extremely sharp sharp edges while maintaining sufficient toughness, balancing high-precision cutting and anti collapse ability.
Excellent process toughness: small heat treatment deformation, malleable, easy to grind, suitable for manufacturing complex pointed cutting tools (such as forming tools, chamfering tools, point drills).
Strong adaptability to working conditions: When processing workpieces with hard skin, uneven allowance, or vibration, the advantage of toughness is prominent, reducing the risk of sudden tool failure.
3、 Differences in toughness among different grades (official reference)
Universal high-speed steel (M2/W6): with balanced toughness and high cost-effectiveness, it is the mainstream choice for sharp edged knives.
High cobalt high-speed steel (M42): Higher hardness (HRC 67-70), slightly reduced toughness, but still superior to hard alloys.
Powder high-speed steel (such as PM4, CPM series): uniform carbides, no segregation, toughness increased by 20% -50% compared to traditional high-speed steel, suitable for high-precision, high impact sharp angle cutting tools.