High Temperature Mechanical Properties of 0Cr18Ni12Mo2Ti Steel

High-temperature mechanical properties of 1Cr18Ni12Mo2Ti steel

1Cr18Ni12Mo2Ti steel is an austenitic grade stainless steel that is widely used in a variety of applications. It has been found to have excellent resistance to corrosion and oxidation, as well as excellent high-temperature mechanical properties. This material is often used in the high-temperature conditions and extreme environments that require the use of a highly resistant alloy.

The uniaxial yield strength of 1Cr18Ni12Mo2Ti steel at room temperature is about 285 MPa. This value increases to about 416 MPa at a temperature of 600°C. Its ultimate tensile strength at room temperature is approximately 550 MPa, and increases to 680 MPa at a temperature of 600°C. Its total elongation at room temperature is 40%, and increases to about 60% at 600°C. The relative ductility of 1Cr18Ni12Mo2Ti steel increases with increasing temperature, a phenomenon that is known as ductile creep.

This alloy is also known for its high resistance to oxidation, especially in high-temperature environments. Its oxidation resistance is generally considered to be twice that of 310 or 316 stainless steels. Furthermore, its resistance to creep at high temperatures is well known. In the range of 600 – 700°C, its creep resistance is generally considered to be twice that of other austenitic stainless steels.

At temperatures above 700°C, 1Cr18Ni12Mo2Ti steel will gradually lose its structural integrity, due to an increase in the rate of creep. The alloy will become embrittled and will require an increase in its thickness diameter in order to be maintained at these temperatures. It should be noted that the embrittlement effect is expected to occur even before it reaches temperatures above 700°C, as the alloy loses its ability to resist creep.

The high temperature strength of 1Cr18Ni12Mo2Ti steel is largely determined by its heat resistance, which is due to its high chromium and nickel content. These components of the alloy effectively protect it from thermal and mechanical stresses. The ability of chromium and nickel to promote the formation of protective oxide surfaces is also one of the main reasons why this alloy has become so widely used in high-temperature environments.

In conclusion, 1Cr18Ni12Mo2Ti steel is an austenitic grade stainless steel that has excellent high-temperature mechanical properties. Its uniaxial yield strength and ultimate tensile strength increase with temperature. Its oxidation resistance is also excellent, and its creep resistance is considered to be twice that of other austenitic stainless steels at temperatures below 700°C. Its high chromium and nickel content also helps to make it an ideal choice for high-temperature applications.

TITLE: High Temperature Mechanical Properties of 0Cr18Ni12Mo2Ti Steel

0Cr18Ni12Mo2Ti steel is a stainless steel material with austenitic structure and is the most widely used type of stainless steel. Its strength and corrosion resistance are relatively high. As 0Cr18Ni12Mo2Ti steel is used in harsh conditions like high temperatures, its high temperature mechanical properties become quite important.

At high temperatures, the plasticity of 0Cr18Ni12Mo2Ti steel decreases while it maintains good toughness and strength. The high temperature yield strength of the steel at 700 °C considerably smaller than the value at room temperature, however, it gradually increases until 800 ℃ and remains almost constant till 900 ℃. The yield strength of the steel depends on its austenitic structure and when the testing temperature reaches up to 1100 ℃, the yield strength of 0Cr18Ni12Mo2Ti steel rises again.

The impact toughness of 0Cr18Ni12Mo2Ti steel can reduce to some extent with increasing temperature from room temperature to 700 ℃, but the impact flexibility of the steel is still very good. After the temperature rises to 800-900 ℃, the impact toughness of 0Cr18Ni12Mo2Ti steel begins to increase again, but this increase is not very obvious.

The high temperature fatigue properties are not as good as the low temperature properties. The 0Cr18Ni12Mo2Ti steel material has ductile-brittle transition between 20-35 ℃ and the transition temperature increases with the increase of loading. Apart from this, the fatigue strength of this steel also decreases exponentially with increasing temperature from room temperature to 500 ℃ and then declines more slowly after that.

Overall, 0Cr18Ni12Mo2Ti steel has good overall performance in high temperature mechanical properties. It has excellent plasticity and strength, good impact toughness and relatively good fatigue resistance. This is why the steel is widely used for components operating in high temperature applications.