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TENSILE STRENGTH, YIELD STRENGTH AND HARDNESS EXPLAINER
| 题名： | TENSILE STRENGTH, YIELD STRENGTH AND HARDNESS EXPLAINER |
| 正文语种： | eng |
| 摘要： | Although 'high-tensile' is a shorthand for extra-strong materials, tensile strength is not usually the most important property of the steel or aluminium used in tipper bodies. Ultimate tensile strength (UTS) represents the point at which a material breaks catastrophically under tension, and is measured in N/mm~2 or the equivalent MegaPascals (MPa). A typical low-carbon structural steel might have a tensile strength of 400-500MPa while 5454 aluminium alloy has a UTS of 250-305MPa (but a density of around a third of steel). Yield strength is the point at which the material undergoes plastic deformation (an irreversible stretching, compression or bending), usually defined as the point of a 0.2% change in length. This figure is always lower than UTS - low-carbon steel has a yield strength of about 250-300MPa - and is often more relevant when specifying materials. Steels are often described in terms of 'toughness' - defined in whatever way suits the manufacturer - but this usually relates closely to yield strength. |
| 出版年： | 2021 |
| 期刊名称： | Transport engineer |
| 期： | Jul. |
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