The difference between hot hardness and wear resistance

2025-11-21

What is Hot Hardness?

Hot hardness refers to a tool material’s ability to maintain its hardness and cutting performance at high temperatures.
During machining, cutting heat rises. If a tool has poor hot hardness, it will soften, lose cutting strength, and wear out faster.

In one sentence:
➡ Good hot hardness means the tool stays hard and sharp even when it gets hot.

Typical materials:
M35, M42, carbide, and high-performance coatings (TiAlN, AlTiN, etc.)

What is Wear Resistance?

Wear resistance describes a tool’s ability to resist abrasion and surface wear during cutting.
Even without extreme temperatures, friction, impact, and workpiece hardness can cause tool wear.

In one sentence:
➡ Good wear resistance means the tool lasts longer and resists abrasion.

Typical materials:
Carbide, and coatings such as TiSiN, AlCrN, etc.

Key Differences

Property	Focus	Conditions	What It Affects
Hot Hardness	Hardness retention at high temperature	High-speed or high-heat cutting	Prevents softening, edge deformation, tool failure
Wear Resistance	Ability to resist abrasion	Friction and long cutting cycles	Tool life, durability, resistance to wear

Easy to Remember

Hot hardness = stays hard when hot
Wear resistance = hard to wear out

Both properties are essential for achieving stable machining and long tool life.

Herramienta de carburo personalizada

Excavadora de carburo

Molino de extremos de carburo

Recauchutador de carburo

Herramienta de hilo

Parte movible del carburo

el collet chuck

Hojas de sierra de carburo

Rebaño de carburo

Instrumentos quirúrgicos ortopédicos

Excavadora de acero de alta velocidad

The difference between hot hardness and wear resistance

The difference between hot hardness and wear resistance