【转帖】drafting standards

yang686526

drafting standards
is there a asme standard for abbreviating metric cm or cm?
eng-tips forums is member supported.
american national standard symbols for mechanics (ansiy 10.3.1968) as presented in machinery's handbook 22nd edition
centimeter=cm
while the standard barm references is the final say, simplistically with metric units...
if the unit is named after a person it's a capital, eg j for joules and n for newtons.
otherwise it's lower case, eg m for meter/metre and s for second.
as regards multipliers, the case also has significance k for kilo m for mega, m for mili etc.
so even on drawings meters are m, kilometers are km and millimeters are mm.
kenat, probably the least qualified checker you'll ever meet...
iso 1000 and astm e380 both deal with si units, and they back up the rules of thumb that kenat sited above, e.g.
p for pascals
i think that pascal = pa
that's right, but the point is, that it is capitalized.
according to the u.s. metric association, pascal is pa
checkerron: m (for mega as in mpa = megapascal) is capital too and it is not derived from a name of a person. when working with units we have to be accurate.   
gearguru, ron was responding to my post in which i made the point about multipliers being case sensitive.  he is well aware of this.
kenat, probably the least qualified checker you'll ever meet...
sorry!