Subject: | |
From: | |
Reply To: | |
Date: | Thu, 27 May 1999 20:32:58 -0700 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
--- Roger Massey-G14195 <[log in to unmask]> wrote:
> Lautaro,
>
> There are a number of "methods" (over 30
> reported) for measuring
> the hardness of materials, of which Shore is
> only one!
>
> From what I understand, the Shore method
> makes use of a
> scleromoter. Basically, a small diamond
> pointed hammer weighing 2.5g
> is allowed to free fall 250mm down a glass tube
> (graduated into 140
> parts) The hardness is related to how far back
> the hammer rebounds
> after its first rebound off the material
> sample. ASTM E448 has the
> basic outline for the methodology, so I would
> take a look at that if
> you are planning on using Shore tests
>
> Other common methods include
>
> Brinell - a 10mm steel ball is pushed into
> the sample with a set
> load and time, hardness is related
> to the size of the mark
> left in the sample. Not very good
> for very hard materials
> See ASTM E10
> Vickers - Diamond tipped, square based
> pyramid pushed into the
> sample, again hardness relates to
> the size and shape of the
> mark left behind. See ASTM E92
> Rockwell - uses either a 1.58mm ball @ 100Kg
> (Scale B) or a diamond
> cone @ 150Kg (Scale C) this time the
> output dial indictaes
> depth of penetration which can be
> converted to an
> indication of hardness. See ASTM E18
>
> Microhardness machines are used where the
> sample is either very
> thin such as platings or very soft and is often
> based on the Vickers
> or Knoop methods, See ASTM E384
>
> Good Luck,
>
>
>
> Roger
>
> ______________________________ Reply Separator
> _________________________________
> Subject: [TN] Shore hardness
> Author: "TechNet E-Mail Forum." <[log in to unmask]>
> at #email
> Date: 25/05/99 19:53
>
>
> Please, send my a message if you know how does the
> shore harness method
> works. I need inmformation urgent!
> I must do a work: harness of different materials,
> any idea?
> Thanks!!!!
>
> _________________________________________________________
> Do You Yahoo!?
> Get your free @yahoo.com address at
> http://mail.yahoo.com
>
> ################################################################
> TechNet E-Mail Forum provided as a free service by
> IPC using LISTSERV 1.8c
> ################################################################
> To subscribe/unsubscribe, send a message to
> [log in to unmask] with following text
> in the body:
> To subscribe: SUBSCRIBE TechNet <your full name>
> To unsubscribe: SIGNOFF TechNet
> ################################################################
> Please visit IPC's web site (http://www.ipc.org)
> "On-Line Services" section for
> additional information.
> For technical support contact Hugo Scaramuzza at
> [log in to unmask] or 847-509-9700
> ext.312
> ################################################################
>
> ################################################################
> TechNet E-Mail Forum provided as a free service by
> IPC using LISTSERV 1.8c
> ################################################################
> To subscribe/unsubscribe, send a message to
> [log in to unmask] with following text in the body:
> To subscribe: SUBSCRIBE TechNet <your full name>
> To unsubscribe: SIGNOFF TechNet
> ################################################################
> Please visit IPC's web site (http://www.ipc.org)
> "On-Line Services" section for additional
> information.
> For technical support contact Hugo Scaramuzza at
> [log in to unmask] or 847-509-9700 ext.312
> ################################################################
>
>
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe: SUBSCRIBE TechNet <your full name>
To unsubscribe: SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################
|
|
|