- Joined
- Jul 9, 1999
- Messages
- 3,316
This is really starting to be a burr on my ass lately.
I've seen several companies (I'll not name names, so don't ask) advertise their newest knife offerings as having 440C for blade steel.
I get interested, put it on the "possible future buy list" and later I see or find out that the knife is actually AUS6A or AUS8A with 8A being the more common of the two.
WHAT?!
Is there some sort of mix-up here?
Are they unsure of the grade of cutlery steel they are using?
Are they trying to "beef up" their ad campaigns by using the name of a more popular and recognizable grade of cutlery steel?
Does the ad dept. have ANY idea of what steel the knife is being manufactured with?!
Well, for those of you in the advertising depts. of these companies let me briefly point out the elemental differences in these two grades of steel: (note: the values shown are percentage values with the greater bulk being Iron, of course)
----------440C -----AUS8A
Carbon ----0.95-1.2 ---0.7-0.75
Chromium --16.0-18.0 ---13.0-14.5
Manganese ---------1.0 ---0.5
Nickel - ----- -----0.49
Phosphorus --0.04 -----0.04
Silicon --------1.0 -----1.0
Sulphur ----0.03 -----0.03
Vanadium --- ------0.10-0.25
Obtained from Spyderco's Steel Alloy Chart found on their website.
Now, some of you are thinking "why is this guy getting his nose bent outta shape over this?"
Well, it's a matter of performance and principle.
As far as performance goes, 440C has more Carbon (and Manganese) and more Chromium. This translates to more hardenability and stain resistance, respectively.
The more Carbon, and to a lesser extent Manganese, the harder you can make a blade.
The more Chromium, the more it resists staining. As you can see, 440C has more of these elements in it's make-up.
Now, AUS8A has Vanadium and 440C doesn't. As you probably already know, Vanadium carbides are some of the harder carbides found in cutlery grade steel and go a long way in imparting a greater degree of wear resistance(read: edge retention)and resistance to shock impact in a blade.
Ok, so they may be roughly equal in the edge holding dept. Still, even though the overall differences may be minor in the greater scheme of things, don't try to sell me AUS8A in the guise of 440C. This really pisses me off to no end.
If it is actually AUS8A or 6A, THEN SAY SO!
Powering down the senseless rant mode now...

I've seen several companies (I'll not name names, so don't ask) advertise their newest knife offerings as having 440C for blade steel.
I get interested, put it on the "possible future buy list" and later I see or find out that the knife is actually AUS6A or AUS8A with 8A being the more common of the two.
WHAT?!

Is there some sort of mix-up here?

Are they unsure of the grade of cutlery steel they are using?
Are they trying to "beef up" their ad campaigns by using the name of a more popular and recognizable grade of cutlery steel?
Does the ad dept. have ANY idea of what steel the knife is being manufactured with?!
Well, for those of you in the advertising depts. of these companies let me briefly point out the elemental differences in these two grades of steel: (note: the values shown are percentage values with the greater bulk being Iron, of course)
----------440C -----AUS8A
Carbon ----0.95-1.2 ---0.7-0.75
Chromium --16.0-18.0 ---13.0-14.5
Manganese ---------1.0 ---0.5
Nickel - ----- -----0.49
Phosphorus --0.04 -----0.04
Silicon --------1.0 -----1.0
Sulphur ----0.03 -----0.03
Vanadium --- ------0.10-0.25
Obtained from Spyderco's Steel Alloy Chart found on their website.
Now, some of you are thinking "why is this guy getting his nose bent outta shape over this?"
Well, it's a matter of performance and principle.
As far as performance goes, 440C has more Carbon (and Manganese) and more Chromium. This translates to more hardenability and stain resistance, respectively.
The more Carbon, and to a lesser extent Manganese, the harder you can make a blade.
The more Chromium, the more it resists staining. As you can see, 440C has more of these elements in it's make-up.
Now, AUS8A has Vanadium and 440C doesn't. As you probably already know, Vanadium carbides are some of the harder carbides found in cutlery grade steel and go a long way in imparting a greater degree of wear resistance(read: edge retention)and resistance to shock impact in a blade.
Ok, so they may be roughly equal in the edge holding dept. Still, even though the overall differences may be minor in the greater scheme of things, don't try to sell me AUS8A in the guise of 440C. This really pisses me off to no end.
If it is actually AUS8A or 6A, THEN SAY SO!
Powering down the senseless rant mode now...