Notched Izod Impact Strength Units 
KJ/m²:  KiloJoules per square metre  (standard units) 
J/m:  Joules per metre  (optional units) 
Conversion depends on specimen dimensions, but for the most common specimen (type 1, with notch A), 1 KJ/m² is approximately 8 J/m. If the property is an unnotched value, then for the same specimen (type 1) 1 KJ/m² is approximately 10 J/m. 
Tensile Strength and Flexural Strength Units 
Mpa:  MegaPascals  (standard units) 
MN/m²:  MegaNewtons per square metre  (optional units) 
N/mm²:  Newtons per square millimetre  (optional units) 
Conversion is simple, all of the above units have exactly the same value. 1 Mpa = MNm² = 1 N/mm² 
Falling Dart Impact Strength Units 
J:  Joules  (standard units) 
KJ:  KiloJoules  (standard units) 
J/mm:  Joules per millimetre  (optional units) 
Conversion:  (i) 1 KJ = 1000 J (ii) 1 J/mm = 1 J divided by sheet thickness 

Vicat Softening Temperature and Heat Deflection Temperature Units 
ºC:  Degrees Celsius or Centigrade  (standard units) 
(Being the temperature at which the material softens as defined by the test). 
UL94 Flammability Resistance Units 
mm:  millimetres  (standard units) 
(Being the minimum sheet thickness that can pass the test conditions). 
Alternatively, for a fixed sheet thickness, the UL94 test that the product meets may be quoted, as defined in order of severity of the most commonly applied tests: 
V0 Vertical Burn, Grade 0 V1 Vertical Burn, Grade 1 V2 Vertical Burn, Grade 2 HB Horizontal Burn 