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The filament diameter of most types is about 5-7μm. Carbon fibre has the highest specific stiffness of any commercially available fibre, very high strength in both ten- sion and compression and a high resistance to corrosion, creep and fatigue. Their impact strength, however, is lower than either glass or aramid, with particularly brittle characteristics being exhibited by HM and UHM fibres. Strength and Modulus Figures for Commercial PAN-based Carbon Fibres: Grade Tensile Modulus Tensile Strength (GPa) (GPa) Standard Modulus (<265GPa) (also known as ‘High Strength’) Country of Manufacture France/Japan Japan Germany Japan Japan/USA USA USA USA/Hungary USA Japan Japan France/Japan France Japan Japan USA USA USA USA Japan France/Japan Japan Japan Japan Japan Japan Japan Japan USA T300 T700 HTA UTS 34-700 AS4 T650-35 Panex 33 F3C TR50S TR30S 230 3.53 235 5.3 238 3.95 240 4.8 234 4.5 241 4.0 241 4.55 228 3.6 228 3.8 235 4.83 234 4.41 Intermediate Modulus (265-320GPa) T800 294 M30S 294 IMS 295 MR40/MR50 289 IM6/IM7 303 IM9 310 T650-42 290 T40 290 High Modulus (320-440GPa) M40 392 M40J 377 HMA 358 UMS2526 395 MS40 340 HR40 381 Ultra High Modulus (~440GPa) M46J 436 UMS3536 435 HS40 441 UHMS 441 5.94 5.49 4.12/5.5 4.4/5.1 5.1/5.3 5.3 4.82 5.65 2.74 4.41 3.0 4.56 4.8 4.8 4.21 4.5 4.4 3.45 Table 2 – PAN based fibre properties (information from manufacturer’s datasheets) 30 - GTC-6-0417PDF Image | GUIDE TO COMPOSITES
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