AISI A8 MOD Cold Work Tool Steel

1: AISI A8 MOD steel introduction

A8-mod is a modified version of AISI A8. It’s a conventional cold work tool steel, with a medium carbon content and alloyed with chromium, molybdenum and vanadium. This steel is an improved steel of A8 steel, with good hardenability, toughness, heat treatment dimensional stability. Suitable for punches and cold forging dies with hardness requirements of 55-60 HRC. In addition, it is suitable for manufacturing non-metallic materials due to good hardness, wear resistance and toughness.

Cutting:

Precision cutting to standard dimensions

Custom cutting according to client specifications

Surface Grinding/Polishing:

Thickness tolerance: -0 to +0.1mm

Flatness: 0.01/100mm

Surface roughness: Ra ≤1.6 or Rz ≤6.3

2: AISI A8 MOD Steel equivalent

3: AISI A8 MOD steel chemical composition

4: AISI A8 MOD steel mechanical properties

The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT.

6. AISI A8 MOD Tool Steel Heat Treatment

Annealing

Slowly heat to 870 – 890 ℃ , then slowly Cool to 500 ℃ in heat treatment furnace. Then frosty in make public. After annealing hardness HBS: 229 Max

Quenching 

Quenching temperature / ℃ | outlet air cooling, oil cooling or air cooling : 1000 – 1050

Quenching hardness : 59-62 HRC

Tempering 
Tempering temperature / ℃ : 150 – 320

After tempering hardness HRC or future: 53 – 60

7: Delivery condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.

For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.