Oil futures tumbled more than $5 a barrel on news that the Biden administration is considering releasing about 1 million barrels a day from the U.S. Strategic Petroleum Reserve (SPR) for several months to cool surging crude prices.

Brent crude futures were down $4.71, or 4.2 percent, at $108.58 a barrel by 0035 GMT. U.S. West Texas Intermediate futures fell $5.45, or 5 percent, to $102.74 a barrel.

At an earlier time, gasoline prices had already reached record levels because of the Russia-Ukraine conflict.

The prices of other commodities like the tungsten powder are also expected to be volatile.

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 
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 
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 
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 
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:
 
carbon steel 
chromium 
Inconel 
stainless steel 
titanium 
tool steel 
tungsten 
 
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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For Germany, the largest economy in Europe, the impact of the Russian-Ukrainian conflict on the natural gas market is the most obvious. This also exposed the serious dependence of some German industrial enterprises on Russian natural gas. Some analysts pointed out that the instability of natural gas supply has had a big impact on the German economy and threatened its market competitiveness because alternative energy supplies will not be cheap and difficult to come quickly. Increased uncertainty over natural gas supplies is putting enormous pressure on German manufacturers in sectors ranging from steelmaking to chemical tungsten powder for the time being, but the market demand for tungsten powder in the future will also change with the influence of various external factors. If you need tungsten powder, please feel free to contact us.

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