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Up Topic Welding Industry / Metallurgy / Tensile Strength of A36 vs A572-50
- - By eekpod (****) Date 06-03-2010 11:23
Question  Why does ASTM A36(08) have a range (minimum and maximum) for Tensile strength?
I ask because ASTM A572-50(07) has a minimum only to be met and not a maximum.
Thanks
Chris
Parent - By HgTX (***) Date 06-03-2010 19:36
I don't know the history of A 36, but reasons to put in a maximum strength include ductility (higher-strength material may not be as ductile) and use of the "strong column/weak beam" design philosophy where you want to be sure that some elements fail before others.

Maybe by the time A 572 came along, they were willing to let elongation take care of the ductility problem, and if you want to make sure something fails before something else, then you use A 36 instead of A 572 to get a weaker member so there was no point in limiting the strength.

Hg
Up Topic Welding Industry / Metallurgy / Tensile Strength of A36 vs A572-50

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