Previous in Forum: Solvent Used for Mixing the Chitosan and Acrylonitrile Butadiene Styrene   Next in Forum: ceo
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
8 comments
Rate Comments: Nested
Anonymous Poster

Pencil Hardness

10/10/2007 7:11 AM

For a 2~3H pencil hardness coating, what will be the maximum force can be applied to a contact probe with an effective contact dia of 5mm without breaking the coating?
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
FKIA
Power-User

Join Date: Jul 2007
Location: Somewhere in the hills of Pennsylvania, I think.
Posts: 246
Good Answers: 4
#1

Re: Pencil Hardness

10/11/2007 1:15 AM

If you really want to know, it'll cost you.

__________________
 I'm somewhere between the age of thirty-something and Alzheimer's. I just can't remember where!
Reply
prbarry
Power-User

Join Date: Feb 2007
Posts: 273
Good Answers: 3
#2

Re: Pencil Hardness

10/11/2007 8:13 AM

Contact some one that makes pencils and talk to their engineer.
Reply
Anonymous Poster
#3

Re: Pencil Hardness

10/11/2007 10:00 AM

My dog ate a pencil the other day. All I could think was, well, it'll probably make him go No. 2......

True story
Reply
Anonymous Poster
#4

Re: Pencil Hardness

10/11/2007 11:34 AM

See ASTM D3363, ASTM D3359, and ISO 15184. These test specifications may help but I am not sure pencil hardness tests are going to be specific enough.
Reply
Anonymous Poster
#5

Re: Pencil Hardness

10/11/2007 1:31 PM

Refer to NACE or SSPC for reference information
Reply
vikas
Guru

Join Date: Aug 2007
Posts: 548
#6

Re: Pencil Hardness

10/11/2007 4:25 PM

my tiny daughter ought to know that she does it without breaking on walls
Reply
Johnjohn
Guru
Popular Science - Cosmology - New Member United States - Member - New Member

Join Date: Apr 2007
Location: 33.49N, 84.19W
Posts: 1475
Good Answers: 3
#7

Re: Pencil Hardness

10/11/2007 8:50 PM

F = √(Fx2 + Fy2) / [(2~3H) /(Pi{2.52(length of pencil lead)}] /

[Š* x λ ] - ¶ + (average temp in ° celcius where pencil lead is under stress) - your age + your height in mm.

* This must be determined by the witch doctor at midnight on a full moon.

__________________
 All worthwhile programmers know that constants always vary.
Reply Off Topic (Score 5)
Maimuki
Active Contributor

Join Date: May 2007
Posts: 23
#8

Re: Pencil Hardness

10/17/2007 12:01 PM

Hi!

YOu can refer to ASTM D3363 (http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/HISTORICAL/D3363-00.htm?L+mystore+pmax1328), in this standard, this may help but you need to purchase this standard.
Reply
Reply to Forum Thread
Have a Different Question?
8 comments
Copy to Clipboard

Users who posted comments:

Anonymous Poster (3); FKIA (1); Johnjohn (1); Maimuki (1); prbarry (1); vikas (1)

Previous in Forum: Solvent Used for Mixing the Chitosan and Acrylonitrile Butadiene Styrene   Next in Forum: ceo
You might be interested in: Hardness Testers, Coating Services

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (212 right now)
Show Members
Advertisement