Annex I Units of Measure: Code elements listed by quantities - UNECE

Codes for Units of Measure used in International Trade
Units of Measure: Code elements listed by quantities
Quantity
Level
Cat.
Use
Id.
Name
Conversion factors to SI
units
(1 unit equals)
Represen.
Symbol
Cross
ref.
pressure, normal stress,
shear stress, modulus of
elasticity, shaer
modulus, modulus of
rigidity, bulk modulus,
modulus of compression
linear strain, relative
elongation
2 pound per square foot lb/ft ² 228
2 pound-force per square
inch
2 X kilogram-force per square
metre
689 4,757 Pa lbf/in 229
9,806 65 Pa (exactly) kgf/m ² 230
2 X torr 133,322 4 Pa Torr 231
2 X technical atmosphere 98 066,5 Pa (exactly) at 232
2 pounds per square inch
absolute
2 X conventional millimetre of
water
2 kilogram per square
centimeter
2 X conventional millimetre of
mercury
lb/in ² 233
9,806 65 Pa (exactly) mm H 2 O 234
235
133,322 4 Pa mm Hg 236
1 one 1 237
shear strain 1
volume or bulk strain 1
poisson ratio, 1 one 1 240
poisson number 1
compressibility, bulk
compressibility
second moment of area,
second axial moment of
area
second polar moment of
area
1 reciprocal pascal or pascal
to the power minus one
Pa -¹ 242
1 metre to the fourth power m 4 243
2 inch to the fourth power 41,623 14 x10 - 8
m 4 in 4 244
section modulus 1 metre cubed m ³ 245
friction factor, coefficient
of friction
2 inch cubed 16,387 064 x10 - 6
m³ in³ 246
1 one 1 247
viscosity (dynamic
viscosity)
1 pascal second Pa . s 249
1S millipascal second mPa . s 250
2 poise 0,1 Pa . s (exactly) P 251
2 centipoise cP 252
kinematic viscosity 1 metre squared per second
(square metres/second US)
1S
millimetre squared per
second
m ² /s 253
mm ² /s 254
2 stokes 10 - 4
m²/s (exactly) St 255
2 centistokes cSt 256
2 foot squared per second 0,092 903 04 m²/s ft ² /s 257
Recommendation 20 153