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Knife Steel Composition and name cross-reference database. Includes popular, high end and exotic alloys used in knife blades. Over 6500 alloy names, over 1000 compositions. Alloy names for 21 different international standards, proprietary names and their equivalents. Easy alloy composition comparison with bar graph in 3 modes: mass percentage, molar masses and atomic count per 1000 atoms.

If you have suggestions for improvement, please contact me. Posting in the review that there's a room for improvement doesn't help me at all, I am not a designer, but a software engineer.

Please report missing alloys, as in either post the alloy name, or contact me. Complaining in the review "I didn't find what I wanted" means very little.

If you encounter any problems using the app, please contact me using email. Posting in the review you have a problem, won't give me enough information to fix it.

Sorry, there will be no translations to any language. There is no team, I am just one person collecting steel data and coding the app on web and mobile platforms. I have neither time nor resources to keep constantly translating large database.

Case CV has been the database for a long time. Search for Case does show in the results. Case isn't the steel maker though.

What’s New

Version 1.92

Fixes sort order to alphabetical in quick search.
Multithreaded performance improvements.

Ratings and Reviews

4.9 out of 5
221 Ratings

221 Ratings

ShawBamm ,

Thanks for making me look smart.

So, when buying knives, many throw the steel types of the knives they are selling around as if they know what they are talking about. NOT! I pull up the app, never saying a word about such a comprehensive app I am reviewing and figure out wether I buy or walk. Most times, I am walking away. I also, in my own way, determine a price I am willing to pay for a knife post the app review. Sometimes, depending on the seller I may engage him with some verbal knife fighting, and get my price. Looking for updates to keep me looped in. Thank you kindly.
Retired FLEO, Chicago, IL.

Developer Response ,

Thanks for the feedback. Alloy names database is updated frequently, well as I get the new data and it's available on the device after next synchronization. Application updates happend 1-2 times a year depends on how much free time I have, unless I find a crash that needs immediate attention.

Ardant ,

Absolutely Awesome App!

My “GoTo” reference for knife and tool steel composition! Dead useful. I ran across a typo last year, sent developer an email with a correction, and he got back to me the next day, then posted the correction the day after that! Talk about responsiveness!useful. There is nothing like it for anybody interested in knife steel or tool steel composition. It makes comparing different steels fast and effortless.
Way to go, ZviSoft!

Ipso Laurie Fatso Non ,

Solid reference for evaluating and choosing steels

This is really the only game in town. A well written, easy to navigate app with useful and appropriate commentary. Pulls the so many many hundreds of current and recent steels into some order, so you can begin to understand what makes a good steel (why is lowly ol’ 420HC the chemical basis of many 21st century super steels? How about 1095 and D2, why are they still around? Read on). Not perfect, and necessarily incomplete. We wish Zvi would issue a true 2.0, we’d gladly pay for that!

Developer Response ,

Thanks for feedback, although it would help if you could elaborate on that is true 2.0. I am not a designer, just a coder + knife enthusiast. App will remain free and data centric, I have no extra money to pay for design costs on a free app. Anyway, I'll be happy to hear improvement ideas if you have any.


ZviSoft LLC
4 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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