A2 Flat Ground Stock
Chemical Composition

 Carbon - .95%-1.05%
 Manganese - 1.00% Max
 Silicon - .50% Max
 Molybdenum - .90%-1.40%
 Chromium - 4.75%-5.50%
 Vanadium - .15%-.50%
 *Nickel - 0.30% Max

* Unless otherwise specified, nickel plus copper equal 0.75% max. for all tool steel types.
A2 Tool Steel Flat Ground Stock is typically bought to meet chemistry requirements rather than physical requirements. For that reason, physical properties are generally not provided unless requested prior to production. Any material can be sent to a third party after production to be tested for physical properties.
Typical Uses
  • Large Blanking Dies
  • Thread Roller Dies
  • Long Punches
  • Rolls
  • Master Hubs
  • Trimming Dies
  • Forming Dies
  • Precision Tools
  • Gauges
  • Coining Dies
  • Extrusion Dies
  • Mandrels
  • Shear Blades
  • Slitters


Alro stocks A2 Tool Steel Flat Ground Stock in a variety of sizes or cut to your specifications and delivered. A2 Flat Ground Stock, also known as FGS or FG Stk, has been ground to surface finish of up to 35Ra on six sides. It is sold annealed to be heat treated and it is free of defects and decarburization.

About A-2 Steel 

A-2 Steel is an air-hardening tool steel containing five percent chromium which replaces the oil hardening (O1 tool steel). A2 is a good choice when safer hardening, less distortion and increased wear-resistance are required for a job. In addition, A2 steel provides an intermediate grade between the oil hardening and the high carbon, high chromium (D2 tool steel) types.
Overall A2 provides a good balance of characteristics including:
  • Good machine-ability
  • High compression strength
  • Very good non-deforming properties
  • Deep hardening
  • High dimensional stability after hardening and tempering

To learn more about Tool Steel and the different grades available, visit our page on Tool Steel