A2 Flat Ground, is an air hardening chromium alloy die steel that replaces O1 Flat Ground when safer hardening, less distortion and increased wear resistance are required. Characteristics of A2 Flat Ground include - good machinability, high compressive strength, very good non-deforming properties, deep hardening, and high dimensional stability after hardening and tempering. A2 Flat Ground is ground to a surface finish of up to 35Ra on six sides and is free from defects and decarburization.
- Specifications: ASTM A681, QQ-T-570, AISI A2
- AKA: A2 flat bar, A2 premachined
- Applications: shear blades, dies, punch plates, etc.
- Tolerances: Thickness = +/- .001", Width = +.005/-0
- How is it Measured? Thickness (A) X Width (B) X Length
- Available Stock Sizes: 18 inch lengths
Rockwell Hardness | 59-62C | Corrosion Resistance | Low |
Machinability | Medium | Depth of Hardening | Deep |
Weldability | Difficult | Grindability | Medium |
Wear Resistance | High | Distortion in Heat Treating | Lowest |
Overall Toughness | Medium | Decarburization Resistance | Medium |
Strength | Medium | Resistance to Heat Softening | Medium |
* Data provided for references only and is not warranted.
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