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Spyderco Air by Gayle Bradley

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Spyderco Air by Gayle Bradley

JakeRoberts

240

Aug 13, 2015

Just a small thing, CPM M4 is not a true stainless steel, seeing as it only has around 4.5% of chromium, whereas the "accepted" minimum amount required to be classified as stainless is ~12%. That means it will need a bit more care to keep it rust free; cleaning it after use, keeping a coat of TuffCloth or mineral oil on it if it will be stored, etc. Otherwise, a tough tool steel that holds an edge for a long time.

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Cujobob

133

Aug 13, 2015

JakeRobertsGenerally, unless in a very humid environment it won't rust, but it will likely patina. M4 is a good steel but it's a mystery why they used it on a good looking gentlemen's folder.

LX_Emergency

214

Aug 14, 2015

JakeRobertsActually, M4 is not a stainless steel at all. It's a tool steel with not even close to enough Chromium to classify as stainless (11% is the minimum.
If dried after use though it'll probably never rust. Merely discoulor. But that has not adverse consequences.

shard_inc

214

Sep 29, 2015

JakeRobertsA lemon juice patina is extremely easy to apply to this blade. This knife is a top notch pocket knife for the office. Perfect size. Unbelievably light weight when you first pick it up.

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