A2 Steel

A2 Steel

A2 steel, a popular tool steel, possesses exceptional properties that make it highly sought after in various industries.

In this blog post, we will cover the key aspects of A2, including its hardness, heat treat process, hardening capabilities, knife applications, and reliable suppliers.

By understanding the features of A2, professionals and enthusiasts can harness its potential for creating durable and reliable tools.

A2 Tool Steel Hardness: Striking the Right Balance

A2 exhibits an optimal hardness, typically ranging from 59-62 HRC (Rockwell Hardness Scale).

This hardness level ensures excellent wear resistance, enabling A2 tools to withstand heavy-duty applications without excessive deformation.

The balanced hardness of A2 allows for effective machining and shaping processes during tool fabrication.

A2 Steel Heat Treat: Enhancing Performance

A2 undergoes a specific heat treat process, including heating, quenching, and tempering, to enhance its performance.

The heat treatment contributes to A2’s exceptional hardness, toughness, and wear resistance, making it suitable for demanding applications where durability and reliability are crucial.

Here is a sample of how its done with corresponding temperature ranges:

  • Heat A2 to 1700 – 1900 degrees Fahrenheit in a forge or with a torch.
  • Allow to cool in the air. It’s an air-hardened steel.

A2 Steel Hardening: Achieving Optimal Strength

Hardening A2 steel involves heating the material to 1700 – 1900 degrees Fahrenheit and then rapidly air cooling it to increase its hardness.

This process transforms the steel into a hardened state, improving its strength and wear resistance.

The high carbon content of A2 steel, 0.95 – 1.05%,  makes it a good candidate for hardened knives and tools.

Steel Composition

To fulfill the requirements for A2, the alloy must meet the following requirements:

A2 Tool Steel Composition
Source: OnlineMetals

A2 Tool Steel Knife: A Cut Above the Rest

A2’s machinability and hardening properties make it a preferred choice for knife making.

The excellent hardness, wear resistance, and toughness of A2 contribute to the creation of durable and reliable knife blades.

A2 steel knives retain their sharpness well, ensuring prolonged cutting performance for various tasks, from everyday use to demanding outdoor applications.

A2 Tool Steel Knife - Gurkha Kukri
A2 Gurkha Kukri – Amazon.com

A2 Tool Steel Suppliers: Reliability and Quality

When sourcing A2, it’s important to choose reliable suppliers known for their quality materials.

Reputable A2 suppliers offer consistent and authentic products, ensuring that the steel meets the necessary specifications for tool fabrication.

Our top choice for inventory is OnlineMetals.com.

Use this guide to select a piece long enough and wide enough for knife making:

  1. Select Material: Tool Steel
  2. Select Shape: Bar-Rectangle
  3. Select Alloy: A2
  4. Thickness: 0.125″ (1/8″)
  5. Width: 1.5″


A2’s exceptional hardness, reliable heat treat process, hardening capabilities, suitability for knife applications, and availability through reputable suppliers establish it as a formidable tool steel.

Understanding the distinctive features of A2 empowers professionals to create durable and high-performance tools that excel in demanding applications.

D2 Steel – Composition and Uses

The Potential of D2 Steel

D2 Steel
Online Metals

D2 steel is a renowned tool steel celebrated for its exceptional performance in various applications.

In this blog post, we will dive into the key aspects of D2, including its hardness, sharpening characteristics, Rockwell hardness, composition, and availability as bar stock.

Understanding the features of D2 allows professionals and enthusiasts to maximize its potential for creating high-quality tools.

D2 Tool Steel Hardness: A Balance of Durability and Machinability

D2 exhibits excellent hardness, typically reaching a range of 58-62 HRC (Rockwell Hardness Scale).

This optimal hardness ensures durability, enabling the steel to withstand heavy-duty applications without excessive wear.

Additionally, D2 strikes a balance between hardness and machinability, allowing for effective shaping and forming processes during tool fabrication.

D2 Steel Sharpening: Achieving an Exceptional Cutting Edge

D2 Steel Sharpening

Sharpening D2 requires careful consideration due to its high hardness.

Employing the appropriate sharpening tools and techniques, such as diamond stones or ceramic sharpening rods, ensures effective restoration of the cutting edge.

Regular maintenance and proper sharpening practices help maintain the optimal sharpness and cutting performance of D2 tools.

D2 Steel Rockwell Hardness: Testing the Steel’s Resilience

D2 typically achieves a Rockwell hardness of 58-62 HRC, making it a robust and resilient tool steel.

The Rockwell hardness test measures the steel’s ability to resist deformation and withstand applied forces, highlighting D2’s capacity to endure demanding applications and maintain its structural integrity under high-stress conditions.

D2 Steel Composition: Alloying Elements for Enhanced Performance

D2 Composition

D2 is composed of carbon, chromium, molybdenum, vanadium, and other alloying elements.

The precise composition contributes to its exceptional hardness, wear resistance, and toughness.

The high chromium content enhances corrosion resistance, while molybdenum and vanadium improve strength and toughness.

This well-balanced composition makes D2 a popular choice for manufacturing cutting tools, dies, punches, and other high-performance applications.

D2 Steel Bar Stock: Versatile Material for Tool Fabrication

D2 is widely available as bar stock, providing manufacturers and craftsmen with a versatile material for tool fabrication.

*We recommend the selection at OnlineMetals. We’ll detail how to make a selection below.

D2 bar stock allows for the production of custom-sized tool blanks, providing flexibility in creating tools tailored to specific applications.

Its availability as bar stock streamlines the manufacturing process, ensuring efficiency and convenience for tool makers.


D2 steel’s exceptional hardness, sharpening characteristics, Rockwell hardness, precise composition, and availability as bar stock establish it as a formidable tool steel.

Understanding the distinctive features of D2 empowers professionals to create durable, high-performance tools suited for a wide range of demanding applications.

How to Buy D2

First, go to OnlineMetals. Then follow the selection steps below:

  1. Select Material: Tool Steel
  2. Select Shape: Bar-Rectangle
  3. Select Alloy: D2
  4. Thickness: 0.125″ (1/8″)
  5. Width: 1.5″ (this gives you plenty to work with)