Embrittlement

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Embrittlement is a loss of ductility of a material, making it brittle. Various materials have different mechanisms of embrittlement.

Cryogenic embrittlement[edit]

Around cryogenic temperatures plastics and rubbers become brittle, which is known as the embrittlement temperature.

Embrittlement temperatures[1]
Material Temperature [°F] Temperature [°C]
Plastics
ABS −270 −168
Acteal? −300 −184.4
Delrin -275 to -300 -171 to -184
Nylon -275 to -300 -171 to -184
Polytron −300 −184.4
Polypropylene -300 to -310 -184 to -190
Teflon −275 −171
Rubbers
Buna-N −225 −143
EPDM -275 to -300 -171 to -184
Ethylene propylene -275 to -300 -171 to -184
Hycar -210 to -275 -134 to -171
Natural rubber -225 to -275 -143 to -171
Neoprene -225 to -300 -143 to -184
Nitrile -275 to -310 -171 to -190
Nitrile-butadiene (ABS) -250 to -270 -157 to -168
Silicone −300 −184.4
Urethane -275 to -300 -171 to -184
Viton -275 to -300 -171 to -184
Metals
Zinc −200 −129
Steel −100 −73

See also[edit]

References[edit]

  1. ^ Gillespie, LaRoux K. (1999), Deburring and edge finishing handbook, SME, pp. 196–198, ISBN 978-0-87263-501-2.