2015年4月27日 · Stainless steel is steel with at least 13% chromium (by weight) added in to ward against rust. (D2 is 12% max, hence why it is called an "almost stainless" tool steel) As per how 440c stacks up against other "basic" steels; 440c Carbon/Chromium content = 0.95-1.2%/16-18% 8cr14mov has a 0.8/14% max Aus8 has a 0.75/14.5% max 12c27 has a 0.6/13.5% ...

2016年2月22日 · Jay Fisher on the toughness advantages of 440C stainless: "High tensile strength. Specifically, this is the maximum load that a steel can bear without stretching permanently. This is typically the strength factor of steel that is critical to making a steel choice. How different are the stainless tool steels than standard carbon steels?

2013年12月7日 · The HT process for stainless steels is a time dependent thing. Longer wouldn't hurt, but shorter may give poor results. Forget the things in industrial charts about 1 hour per inch and such. There is still a minimum. In stainless and high alloy steels, 30 minutes is a minimum.

2003年6月10日 · 440C Stainless Preheat thoroughly at 1400/1500ºF and hold for 30 minutes. Raise heat to 1950º F and hold for one hour. Air quench at room temperature. Subzero freeze at 200º below 0. Tempering: Temper at 400ºF for one hour, two times _____ ATS-34 Stainless Preheat thoroughly at 1400º/1500ºF and hold for 30 minutes.

2013年4月21日 · I've noticed that the 440C on some German-made traditional knives isn't anywhere near as hard as it could (or should) be, to take advantage of it's higher carbon content for edge-holding. In fact, it sort of shocks me sometimes, that some of these 440C blades very closely mimic the behavior of the stainless used in Victorinox SAKs (I also have ...

2013年4月10日 · Usually, on the sites of 440C stainless producer, they recommend always the following treatment: 1. To anneal 440C stainless steel, heat uniformly to 840-875°C. Soak and cool very slowly in the furnace. 2. To harden stainless steel 440C heat to 1010-1070°C, fully soak and quench in warm oil or air cool.

2009年10月27日 · 440C is a tad easier to sharpen so in the case of your H/H field knife, I think 440C would work fine for you and I also do agree with the comment about 440C having larger carbides which will give you a slightly toothy edge. The CPM of S35V meaning that is a powdered steel. And YES! Good Ole 440C is old hatish and I happen to like my old hat!

2003年12月30日 · The only stainless I use it 440C because I can quench it at home with my torch, plus I grew up with 440C. I picked this tip up from Ed Fowler right here on the forums. You can do a triple oil quench on 440C. That triple quench seems to have the same effect on 440C as the long soak (which was my original question on the subject).

2013年11月7日 · 440C's higher chromium carbide content makes it more challenging to sharpen on lesser abrasives, like Arkansas stones for example. On the other hand, silicon carbide will eat it for breakfast. A combination of thinning the edge grind and using such an abrasive for finishing & polishing 440C can make it much easier to put a razor edge on it.

1999年4月19日 · According to your better heat treaters, cryo is just another "standard" step in the treating/tempering process of 440C and ATS34. This should be standard practice with quite a few of the "stainless" steels and is considered to be an industry standard.