Calling out Material Condition, ie: Hardness
Calling out Material Condition, ie: Hardness
(OP)
What is the proper way to specify the material hardness or heat treatment on a drawing? Should I be using a "H0000" condition or just a "RC" number?
Thanks.
Thanks.





RE: Calling out Material Condition, ie: Hardness
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Calling out Material Condition, ie: Hardness
For hardness, please use industry standard nomenclature:
HBW - Brinell with WC indenter
HRX - Rockwell with X scale (where X can be A, B, C, etc.)
HV - Vickers
HK - Knoop
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Calling out Material Condition, ie: Hardness
I hope that helps.
Best Regards,
Heckler
Sr. Mechanical Engineer
SW2005 SP 5.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
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RE: Calling out Material Condition, ie: Hardness
One more question: What's the proper definition of the "H" condition? Or, better yet, where do I find a source for that?
Additionally, is there a Y14. standard for guidence on this matter?
Thanks.
RE: Calling out Material Condition, ie: Hardness
http://
h
hardness - the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Calling out Material Condition, ie: Hardness
http://www.matweb.com/index.asp?ckck=1
Best Regards,
Heckler
Sr. Mechanical Engineer
SW2005 SP 5.0 & Pro/E 2001
Dell Precision 370
P4 3.6 GHz, 1GB RAM
XP Pro SP2.0
NVIDIA Quadro FX 1400
o
_`\(,_
(_)/ (_)
Never argue with an idiot. They'll bring you down to their level and beat you with experience every time.
RE: Calling out Material Condition, ie: Hardness
Another good one: http://assist.daps.dla.mil/quicksearch/
Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-06)
RE: Calling out Material Condition, ie: Hardness
Thanks.
RE: Calling out Material Condition, ie: Hardness
http
RE: Calling out Material Condition, ie: Hardness
AISI no longer maintains alloy designations, so you shouldn't use it on drawings.
The "H" designations have been developed for a few alloys and are described in documents like SAE AMS standards. There is no H1250 developed for H13, so you shouldn't use it either.
If you know what heat treatment you need, you can write it entirely:
Material: Type H13 according to ASTM A 681
Heat Treatment: Austenitize at 1020 °C for 30 minutes, Quench in 25 °C water, Temper at 560 °C for 30 minutes
Hardness: 52 HRC minimum, 58 HRC maximum
If all you know is your desired final hardness, then just write that. However, this will lead to variation in final properties that may affect your parts.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.