Steel Numbering System

In this video I give a brief explanation of the AISI steel numbering system for carbon, alloy, and tool steels. Also, I discuss some of the steels we use in our production as well as offer for sale.

CORRECTION: The carbon content is actually expressed in hundredths of percent rather than tenths as I said in the video.

[lukebrennan]

VERY plain and simple. No noise, no crap. WELL DONE!

[sanseijedi]

I watched this with no real need beyond basic understanding, but i find someone offering even esoteric knowledge so clearly and jargon-free is irresistible. Really well presented; my thanks!

[santaclaus]

One of the best short intro to steel types I have seen. Super cool. :)

[petersipp]

Real informative. Nicely presented. I like the cards with the numbers plainly written. Easy to follow being able to see the numbers as you spoke about each one.
Thank you.

[brianbender]

Very well done. Like another person said, no obnoxious music or jarring graphics. Just good information well presented. Thanks.

[slimeminem]

I just clicked on the video and I don't know if it's good or not, but I just want to send some appreciation just for posting the video and trying to share the knowledge 🎉

[captcarlos]

Very good short intro to a Big subject.
Thanks.

[pbslab]

Good info! This is the system I learned when I started my T&D apprenticeship back in '77. But there seems to be a bunch of trade-names and letter/number combinations for todays 'designer' alloys.

[leor]

Good introduction to a few basic steel types
We use a few different more specialized types in our product (engineered steel chains)

[basilwatson]

The SAE system is pretty straight forward What annoys me is when you deal with "older"? Machinists they use "trade name " like "silver steel" so I cant make quick decisions on steel as I have to look up the trade name THEN we get on to the Japanese system it would be really nice if there was ONE system

[campbellmorrison]

Very informative. Rule number 1 which I never seem to follow! write the grade on the steel

[joelalleman]

we used 4340 for the axles on our drums for head and tail pulleys on our elevator belt unloading conveyors due to it's added toughness over 4140 . we used the higher grade as used in the mining industry for durability . thanks for an easy to understand, well explained video !!

[normangiven]

4140 & 4150 steels are used in gun barrels. Good stuff.

[weldmachine]

I get good results from using 1045.
A good general use metal is especially popular for CNC Turned components.
Another positive of this metal is that it can be hardened to well over 50 Rockwell in either Water or Oil.

[tomday]

Great job! I worked with various alloys during my career as a product developer and with all the ones you clearly explained here. Most of the steels I used needed wear resistance and impact resistance. As with any metal, the more exotic the alloy, the higher the cost and lower availability. I used the Machinery's Handbook as a guide for material selection for years. As with many resource materials today, it is available in digital form as well as print.

[StrayWolfForge]

Thanks for the very informative video!

[jayski]

I've always wondered if you could use one of those Xray spectrometers that gold dealers use to verify precious metals on steel? Machines like the XRF spectrometer or the Sigma Metalytics verifier can not only tell you the percentage of gold, but the percentage of what other metals may have been alloyed with it. Most often copper, silver, palladium, or zinc. And in the knife world you hear all sorts of numbering systems. Plus the word magnacut steel gets touted as top of the line.

[andyb]

This was a very informative and interesting video, thank you.

[rm]

Thanks for making the video, i liked it!

[adamt]

Wow next time I buy knives I’ll be so much more informed. Thank you😊