1. Trademark VICTORINOX = the "Christian name" of the original boss "Stainless steel" = VICTORI INOX;

2. No matter who writes or calls the factory to ask about the composition of its stainless steel, The result was a polite refusal;

3. Now, the good guys have found out and confirmed that the stainless steel raw materials for the blades of the factory are supplied by a company called Sandvik;

4 .If you call Sandvik Company to ask for the answer to the second point, the answer you will get will be "The stainless steel our company provides for VICTORINOX is 12C27." But this answer is vague and incorrect.

5. It can be found from Sandvik's steel data sheet that the composition percentages of trace elements in 12C27 are about 0.59 carbon, 13.75 chromium, 0.375 manganese, and 0.4 silicon.

6. Through metallographic analysis, the stainless steel composition of VICTORINOX's blade is not the 12C27 steel claimed by Sandvik. Its trace element composition percentage is 0.52 carbon, 15 chromium, 0.45 manganese, 0.6 silicon, 0.5 molybdenum. Therefore, this steel was called INOX (Blade steel of Victorinox Swiss Army Knives (V-SAK)).

7. The composition of INOX is almost the same as that of ATS55, except that the carbon content of the latter is 1.

8. The standard hardness of INOX blades is HRC56, but the edge retention is very good. VICTORINOX has proven (again) through long-term experiments that hardness is a variable in (function of) edge retention, but not the only variable.

The relationship between 9.12C27 and INOX: The latter is a variant of the former. In addition to fine-tuning the composition, 0.5% molybdenum is also added. This is a steel type specially made by Sandvik according to the requirements of VICTORINOX, and its heat treatment process is completely the commercial secret of VICTORINOX.

10.INOX is not the only steel type of V-SAK. The company has also used (or is currently using) 420 series steel to make blades. However, it is different from the situation where Leizeman mostly uses the 420 series (and a small amount of 154CM is used). INOX is still relatively popular in SAK.

11. The Rockwell hardness C values ??of V-SAK components are arranged from low to high: corkscrew and spring leaf 49, screwdriver, bottle opener, awl 52, wood saw, scissors, nail file 53, blade 56, the metal file is harder and chromium plated, so it is difficult to calculate. The materials are generally INOX. V-SAK's spacers are aluminum alloy and the rivets are brass.

12. The heat treatment of INOX is precise and complicated. It is only said that it is quenched when heated to 1040°C, and then annealed at 160°C. Nothing else is known.