ASTM E 140
It is not clear if this conversion program coincides with ASTM E 140 and as such it's usefulness is in question especially when compliance with NACE MR0175 is mandated.
Tom
Easy to use. Nice graphics.
Archived App (Last seen on 21 May 2025)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
This utility app converts between various scales used to measure the hardness of metallic materials. It supports popular Rockwell, Vickers, Knoop, and Brinell scales, with specific corrections for Rockwell measurements. Useful for understanding material properties.
✓Convert between Rockwell, Vickers, Knoop, Brinell scales
✓Cylindrical and Spherical Rockwell corrections
✓Supports numerous Rockwell sub-scales (HRC, HRB, etc.)
✓Reference tool for material hardness
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What's New in Hardness Converter HD
2.4.2
February 25, 2021
Updated to conform to new Apple app store guidelines.
User reviews
Developer apps
FAQ
What metallic material hardness scales does Hardness Converter HD support?
Hardness Converter HD supports a wide range of scales including HRC, HRB, HRA, HRD, HRE, HRF, HRG, HRK, HR15N, HR30N, HR45N, HR15T, HR30T, HR45T, Knoop, Vickers, and Brinell.
Does Hardness Converter HD offer any special corrections for hardness scales?
Yes, the app provides cylindrical and spherical corrections specifically for the Rockwell hardness scales, enhancing accuracy for certain material shapes.
Is Hardness Converter HD available on Android devices?
No, Hardness Converter HD is currently only available for iPad devices, as indicated by its supported devices list.
How often is Hardness Converter HD updated?
The app was last updated on February 25, 2021, with version 2.4.2. While not frequently updated, it remains a stable utility.
What is the user rating for Hardness Converter HD?
Hardness Converter HD has a rating of 4.0 stars based on 2 user ratings. This suggests a generally positive reception from its user base.
Does Hardness Converter HD have advertisements?
No, Hardness Converter HD is ad-free, providing a clean and uninterrupted user experience for its conversion functions.
What is the age rating for Hardness Converter HD?
The app has an age rating of 4+, making it suitable for a broad audience without mature content.
Is Hardness Converter HD suitable for professional engineering use?
The app is intended for reference use only, as stated in its description. While it provides useful conversions, professional engineers should always verify critical data with calibrated equipment.
