Since 2022, Russia-Ukraine geopolitical conflicts have intensified, and global energy prices have risen sharply, with international natural gas prices hitting historic highs. As the most important transitional energy source in the transition from fossil energy to non-fossil energy, the share of natural gas in primary energy has increased from 14.6% in 1965 to 24.7% in 2020. The global gas price indices showed a unilateral downward trend from 2018, bottomed out in 2020, and remained low for a long time. However, since July 2020, the global gas prices have gradually fluctuated upward, and the impact of geopolitical events made the Dutch TTF gas price even hit record highs repeatedly.
An analyst of a securities company believes that the core catalyst of this round of global gas market lies in the lack of investment in upstream oil and gas resources caused by long-term low prices. Since 2020, although the epidemic has led to a decline in demand, the decline in supply has been faster, resulting in a large inventory consumption. In 2021, demand will recover faster than supply (the supply-side is less sensitive to prices, which will be reflected in investment).
As the world's two largest gas tungsten powder are also expected to change significantly.
With metals, direct comparisons based on strength do not work. Because there is no single, universal scale of power. Four types of strength related to metallurgy will be introduced in this article.
Tensile strength is the ability of a material to resist tension. It takes into account the force required to stretch or pull something apart. Materials with low tensile strength are easier to pull apart than materials with high tensile strength.
Compressive strength is the ability of a material to withstand compression (compression). To test the compressive strength, an external force is applied to the material to track how much the material resists a reduction in size. A widely accepted test for compressive strength is the Mohs hardness test. The test uses a 1-10 or softest and hardest mineral grading scale.
Yield strength is the ability of a material to withstand permanent deformation or bending. This is a way of testing the elastic limit of a given material. This is usually determined by a bending test, in which the ends of a beam or rod are clamped and pressure applied. The aim is to discover how much stress is required to exceed the yield point of the material, or the point at which the material will not return to its original shape after the stress is removed.
Impact strength refers to the ability of a material to withstand impact without cracking or breaking. In other words, it's a way to determine the limit of the energy a material can absorb through impact.
Since the strength of a metal depends on many factors, there is no simple answer to the question "what is the strongest metal?" However, several metals are considered to be the strongest, including:
For example, compare tungsten and titanium
Tungsten is the strongest of all natural metals in terms of tensile strength (142,000 psi). But in terms of impact strength, tungsten is weak -- it's a fragile metal and is known to shatter on impact. Titanium, on the other hand, has a tensile strength of 63,000 psi. But when you calculate the density of titanium and compare it pound to pound, it's better than tungsten. In terms of compressive strength, titanium has a much lower Mohs hardness index.
Knowing which material is the strongest really depends on what you're going to do with it. In some applications, high yield strength is critical, but compressive strength is not a factor.
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