Subject	It is a Rockwell Superficial hardness test. It involves usi
Posted by	Ash's Z on December 02, 2004 at 4:11 PM
	This message has been viewed 376 times.
In Reply To	Do you remember what scale the Hardness machine was on? (n/m) posted by yawgm0thzx on December 02, 2004 at 03:30 PM
Message	using a diamond tipped 'punch'. With a differing amount of loading applied to it over 3 loadings, you can measure the hardness of the material by the depth of the indention. HR=E-e e = permanent increase in depth of penetration due to major load F1, measured in units of 0.001 mm E = a constant of 100 units for diamond and ball indenters HR = Rockwell hardness number In the case of the soft valve (which is actually a little harder), the loading applied was 45Kg. E=100 and units of e are 0.001mm. The diamond punch left an impression difference of 0.068mm, or 67 units. HR = E-e =100-68 =32 [ ashspecz.com ] [ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
Follow Ups	Nissan Soft Valves. I've been working on putting my TT - Ash's Z 14:26:31 12/02/04 Nice. (n/m) - YugoBernie (NoVA) 14:33:56 12/02/04 awesome info. thanks for sharing with the group! (n/m) - stockplayerz (NYC) 14:37:25 12/02/04 interesting. (n/m) - Dallas DamonZ 14:38:17 12/02/04 thank you (n/m) - Guapo 14:47:26 12/02/04 nice (n/m) - aliaZ 14:50:25 12/02/04 Very educational...Thanks for sharing! (n/m) - TheTwinZ (Peru) 14:53:05 12/02/04 nice. (n/m) - Milo (Sport Z Magazine) 14:53:05 12/02/04 Very interesting... thanks for the post (n/m) - CarlCuro 14:57:27 12/02/04 Nice! (n/m) - Spongerider :) 14:58:29 12/02/04 First time I've seen hard evidence of soft valves. (n/m) - SactoTodd 15:05:33 12/02/04 chuckle;) (n/m) - UnrulyZX 15:34:07 12/02/04 VTF (n/m) - Pats300zx 15:18:40 12/02/04 It'd be nice to get this into the FAQ's, or move it to TECH - Dave N 15:21:19 12/02/04 Bookmarked. (n/m) - Kenny 15:26:35 12/02/04 Do you remember what scale the Hardness machine was on? (n/m) - yawgm0thzx 15:30:47 12/02/04 Without the alphabetic value, the number is worthless. - Kenny 15:33:13 12/02/04 I knew MSE 201 was good for something lol. - yawgm0thzx 23:14:59 12/03/04 It is a Rockwell Superficial hardness test. It involves usi - Ash's Z 16:11:28 12/02/04 I think he was asking for the letter. - Kenny 16:22:34 12/02/04 That is unknown to me. I had the test performed by someon - Ash's Z 17:05:03 12/02/04 Wasn't busting your chops =). Just curious. (n/m) - Kenny 17:19:00 12/02/04 Assuming the valves are chrome stainless, it would - Guy (SoCal) 17:29:23 12/02/04 Ash, on a non-soft valve head, approximately how much - AzHeat 15:37:26 12/02/04 Interesting that you ask that question, really... >> - Ash's Z 15:56:20 12/02/04 Why was the peacemaker blew-up? Valve lash? - timz 16:54:26 12/02/04 The Ferrea valves wore out just like the soft valve I showed - Ash's Z 17:13:53 12/02/04 did Ferrea compensate you for your troubles? - aliaZ 17:33:13 12/02/04 Not for any of the labor. They were open to producing the - Ash's Z 18:59:54 12/02/04 Huh? - timz 20:15:30 12/02/04 The tops of the solid lifters were dished with a difference - Ash's Z 18:42:05 12/03/04 I just spoke with my engine builder who did my heads. - AzHeat 21:20:51 12/02/04 I told you Mike your engine will be a disaster - HakenTT 22:33:52 12/02/04 LOL, well, there is a big difference between an architect - Ash's Z 18:32:49 12/03/04 I would put my machinist engine builder against yours - AzHeat 23:47:18 12/03/04 You should make silicone nitride valves. Strong, light, and - Scotts94z32 15:43:45 12/02/04 ibCarbonFiberJoke (n/m) - Kenny 15:48:29 12/02/04 ibCarbonFiberTurningIntoOxideDust... ;) (n/m) - Scotts94z32 16:58:26 12/02/04 I have 16 titanium valves that came out of a Nascar in my - Ash's Z 15:59:05 12/02/04 Excellent write-up, Ash. VTF for sure. (n/m) - whitepearlz 15:57:31 12/02/04 Very nice, thats what happened to my NA's engine... - DougZXTT 17:52:33 12/02/04 nice post (n/m) - Spee 18:32:32 12/02/04 vtf i hope thats not happening to my na **: ) (n/m) - 90BlkZ18 22:23:44 12/02/04
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