Aichi Steel Corporation / Japan

AUS8A

Stainless Steel57–59 HRCConventional Ingot Steel Process

Composition

Core alloying elements define the baseline trade-off between wear resistance, corrosion behavior, and toughness.

Material Overview

AUS8A is a Japanese stainless steel produced by Aichi Steel Corporation and widely used in affordable production knives. It is known for its excellent ease of sharpening and good corrosion resistance, making it very user-friendly for beginners. While it does not offer high edge retention compared to modern premium steels, it performs reliably in general everyday tasks and is easy to maintain. It is often chosen for budget-friendly EDC and kitchen knives.

Performance Radar

Use four core metrics to understand the usable operating envelope of this steel at a glance.

Edge Retention

Toughness

Corrosion Resistance

Sharpenability

Edge Retention

5.0

Toughness

7.0

Corrosion Resistance

8.0

Sharpenability

9.0

Advantages

Very easy to sharpen
Good corrosion resistance
Affordable and widely available
Decent toughness for daily use
Beginner-friendly steel

Disadvantages

Low edge retention
Not suitable for heavy-duty cutting
Requires frequent sharpening
Outperformed by modern PM steels

At A Glance

AUS8A is a widely used Japanese stainless steel known for excellent ease of sharpening, good corrosion resistance, and solid toughness, making it a popular budget-friendly knife steel.