Common Units and Conversions. In the following tables, some commonly used units and conversion factors are presented for structural quantities. The SI system ...
Units: N, m, Kg, S
Units: N, mm, Tonne, S
Length: m
Length: mm
Mass: kg
Mass: tonne (T)
Time: second
Time: second
Force: Newton
Force: Newton
*****************************
*****************************
Energy / Work: Joule (J)
Energy / Work: millijoule (mJ)
Power: Watt (=W=J/s)
Power: milliwatt (= mW = mJ/s)
Density: kg/m3
Density: T/mm3
Modulus / Stress: N/m2 (=Pa)
Modulus / Stress: N/mm2 (=MPa)
Temperature: Kelvin (for temperature
Temperature: Kelvin (for temperature
differentials, 1 K = 1 degree C)
differentials, 1 K = 1 degree C)
Conductivity: W/m.K (=J/s/m.K)
Conductivity: mW/mm.K (=mJ/s/mm.K)
Specific Heat: J/T.K
Specific Heat: mJ/T.K
Thermal expansion Coefficient: m/m.C
Thermal expansion Coefficient: mm/mm.C
(1/C)
(1/C)
Flux: W/m2 (= J/s/m2)
Flux: mW/mm2 (= mJ/s/mm2)
Convection: W/m2.K (=J/s/m2.K)
Convection: mW/mm2.K (=mJ/s/mm2.K)
(Exp.) Titanium Grade 2
Units: N, m, Kg
Units: N, mm, Tonne
Length = 50× 70 mm
Length = 0.05×0.07 m
Length = 50× 70 mm
Density=4.5 g/cm3
Density = 4.5E3 Kg/m3
Density = 4.5 E-9Tonne/mm3
Yield Stress=445 MPa
Yield Stress=445E6 Pa
Yield Stress=445 MPa
Elasticity=105 GPa
Elasticity=105E9 Pa
Elasticity=105E3 MPa
Conductivity = 16.4 W/(m.C)
Conductivity = 16.4 W/(m.C)
Conductivity = 16.4 mW/(mm.C)
Specific Heat = 523 (J/Kg.C)
Specific Heat = 523 (J/Kg.C)
Specific Heat = 523E6 (mJ/Tonne.C)
Thermal expansion Coefficient
Thermal expansion Coefficient=
Thermal expansion Coefficient = 9.2E-
=9.2 µm/(m.C)
9.2E-6 m/(m.C)= 9.2E-6 (1/C)
6 mm/(mm.C)= 9.2E-6 (1/C)
Common Units and Conversions In the following tables, some commonly used units and conversion factors are presented for structural quantities. The SI system is used as the baseline. For example, 1 Pascal = 1.0e-6 N/mm2. SI (m, k, s)
Metric (mm, k, s)
Metric (cm, g, s)
Time
second (s)
second (s)
second (s)
Length
meter (m)
1000 millimeter (mm)
100 centimeter (cm)
Velocity
m/s
1000 mm/s
100 cm/s
Acceleration
m/s
2
1000 mm/s
2
100 cm/s
Mass
kilogram (kg)
1.0e-3 tonnes
1000 gram (g)
Density
kg/m
1.0e-12 tonnes/mm
Force
Newton (N)
Newton (N)
1.0e5 dyne (dyn)
Moment
Nm
1000 Nmm
1.0e7 dyncm
Stress/Pressure
Pascal (Pa)
1.0e-6 N/mm
10 dyn/cm
Energy
Joule (J)
1000 millijoule (mJ)
1.0e7 erg
Power
Watt (W)
1000 milliwatt
1.0e7 erg/s
3
2
3
2
3
1.0e-3 g/cm
2
SI (m, k, s)
English (inch, pound force, s)
English (foot, pound force, s)
Time
second (s)
second (s)
second (s)
Length
meter (m)
39.370 inches (in)
3.2808 feet (f)
Velocity
m/s
39.370 in/s
3.2808 f/s
Acceleration
m/s
2
39.370 in/s
2
3.2808 f/s
Mass
kilogram (kg)
Density
kg/m
9.3572e-8 lbfs /in
Force
Newton (N)
0.22481 pound force (lbf)
0.22481 pound force (lbf)
Moment
Nm
8.8508 lbfin
0.73756 lbfft
Stress/Pressure
Pascal (Pa)
1.4504e-4 lbf/in
Energy
Joule (J)
8.8507 lbfin
0.73756 lbfft
Power
Watt (W)
8.8507 lbfin/s
0.73756 lbfft/s
3
2
5.7100e-3 lbfs /in 2
2
4
2
6.8522e-2 slugs 1.9403e-3 slug/ft
2.0885e-2 lbf/ft
3
2
MASS
LENG TIME
FORCE
STRESS
ENERGY
DENSITY
GRAVITY
Pa
J
7.83e+03
9.806
kg
m
s
N
kg
cm
s
1.0e-02 N
7.83e-03
9.806e+02
kg
cm
ms
1.0e+04 N
7.83e-03
9.806e-04
kg
cm
us
1.0e+10 N
7.83e-03
9.806e-10
kg
mm
ms
KN
GPa
KN-mm
7.83e-06
9.806e-03
g
cm
s
dyne
dy/cm²
erg
7.83e+00
9.806e+02
g
cm
us
1.0e+07 N
Mbar
1.0e+07 Ncm
7.83e+00
9.806e-10
g
mm
s
1.0e-06 N
Pa
7.83e-03
9.806e+03
g
mm
ms
N
MPa
N-mm
7.83e-03
9.806e-03
ton
mm
s
N
MPa
N-mm
7.83e-09
9.806e+03
lbfs2/in
in
s
lbf
psi
lbf-in
7.33e-04
386
slug
ft
s
lbf
psf
lbf-ft
1.52e+01
32.17
kgfs2/mm
mm
s
kgf
kgf/mm²
kgf-mm
8.02e-10
kg
mm
s
mN
1.0e+03 Pa
7.83e-06
g
cm
ms
1.0e+05 Pa
7.83e+00
9.806e+02
