Spyderco Forums

I haven't seen Eric for a couple of years. the last time I talked to him I believe he was in California after separating. I would not be surprised to see him at the OKCA Show in April at Eugene,OR.

Steel choice is a balance of trade-offs, choosing a good steel depends on the use or design of the knife. Heat treating the steel is another balance of trade-offs. A great steel can be a poor performer unless it is heat treated appropriately. A lesser steel can be a good performer if heat treated pr...

Location: Posts: 11 I copied this post from Bladeforums Chambers, Thanks for the kind comments. I have a couple of comments about Spyderco. I entered into my relationship with Spyderco with a lot of respect. After working with these folks for a couple of years my respect and admiration for the compa...

I've been studing and using some San Mai Steels the last couple of years. San Mai offers high edge hardness wrapped with an outer ductile clad steel. The effect is synergistic, more blade ductility, high edge hardness. An edge quenched blade would offer these properties as well, but not to the exten...

Hi Jurphaas,
I'm looking forward to sharing some time with you in Vegas, have a safe journey, and thank you for the kind comments..Ed

There are several features in the design of the C83 Persian that I'd like to share with you folks. I like multiple working grip positions. The back grip on the Persian allows the slightly negative angled blade to work as a 4.5 inch blade rather than its measured lenght of 3.5 inches. By choking up o...

Even though the topic is concisely covered here is a bit more information. Damascus Steel historically was made to get a synergistic effect out of poor raw materials, and the increased forging helped further refine the material. High Carbon Steel was at one time more valuable than gold, because of f...

Crucible Steel has a great website with all the specs on thier steels. From memory I believe S30V has about 3% Vanadium, 1.45% Carbon, 14% Chrome. S60V formerly 440V Has about 5.5% Vanadium, 2.5% Carbon and 17%Chrome, S90V formerly 420V has About 9% Vanadium, 2.5% Carbon and 14% Chrome. CPM technolo...

Damascus Steel is treated, usually etched with ferric chloride to reveal the pattern. Muratic, Phosphoric, and Nitric acids all will give some pattern relief and exposure but with usually less contrast. Timascus is resistant to most of these etchants. The oxides of timascus are much more durable tha...

Timascus is a laminate of two unique titanium alloys, and like Damascus is patterned throughout the bar. It is for real, it is very light, and it is cool.

San Mai can be a highly symbiotic relationship between steels for the focus of the use of a knife. Because of San Mai methods you can support a core of high quality cutting steel with a resilent laminate and run the core a a higher hardness than you might run that type of knife. Resilentcy and corro...

Damascus laminates can still help us achieve quailties in a working blade that are hard to match with contemporary smelted steel. Currently I'm making some San Mai products that have some impressive qualities. For example: 15N-20, 52100, 15N-20 San Mai has more ductility than straight 52100. It can ...

Damascus can be made of highand low carbon, but other alloying components can be even more important, like nickel, chrome, manganese all effect the etched coloration of steel. To get the 40 some pounds of bolster material for the twentyfifth anniversary knife I forged about 450 pounds of steel in pr...

Damascus means watered steel. That which has the illustion of rivers and pools. Some of the first was made of wootz ingots brought across the silk road to Damascus. Multiple low temperature forging and the heat treating was responcible for the pattern. Layered steel has been found that was forged B....

Spyderco already uses S60V under the old name of 440 V. The high Vanadiaum steels are all harder to sharpen at any given hardness because of the high Vanadium Carbide content. S60 V and S90 V have austenizing temps over 2000 DF. That requires ceramic encased heat coils in the heat treating furnesses...

Gentlemen, Powder Mosaic Development in the NW has been a unique and special process born of free exchange of information, and strong and developing friendships. To get the process to the point it is today is the result of maybe a dozen innovators, all pursuing thier own path yet sharing freely. The...

Sharp 1, thanks for the technical support...Ed

Gentlemen, I have noted comments, thank you, and posted one message at the general forum, please except my apology for the multiple post.

Posts: 3 Posted - 14 February 2002 18:36 -------------------------------------------------------------------------------- Over my years of bladesmithing I have observed a problem reoccuring that hurts the free flow of information. The problem is that occassionally pattern, design or material technol...

oops

Edited by - Ed Schempp on 2/21/2002 12:35:55 AM