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 Explanation of Units of Measurement 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: V-0 Vertical Burn, Grade 0V-1 Vertical Burn, Grade 1V-2 Vertical Burn, Grade 2HB Horizontal Burn