carbon fibres type LM 

https://doi.org/10.1351/goldbook.C00836
Carbon fibres type LM (low modulus) are carbon fibres with isotropic structure, tensile modulus values as low as 10% of the C11 values of the graphite single crystal, and low strength values.
Note:
The term carbon fibres type LM is sometimes used for various types of isotropic carbon fibres known as pitch-based or rayon-based carbon fibres that have not been subjected to hot-stretching. Such fibres are not used for reinforcement purposes in high-performance composites.
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 482 [Terms] [Paper]
Citation: 'carbon fibres type LM' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.C00836 RIS BibTex EndNote
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Last revised: February 24, 2014