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This post was last edited by goldliyang on 2019-9-7 at 15:10. The meaning of 08Ni3DR: 8 indicates a nominal carbon content of 0.08%, with the actual content not exceeding 0.10%； Ni3 represents a nominal Ni content of 3%, with an actual content ranging from 3.25% to 3.70% ； DR stands for low-temperature pressure vessel. 08Ni3DR: Carbon content is 0.08%, with the actual value not exceeding 0.1%; nickel content is 3%, while the actual range is 3.25%-3.7%. DR refers to low-temperature pressure vessels. The chemical composition of 08Ni3DR is as follows: C, Si, Mn, P, S, Ni, Mo, V – limits of 0.1, 0.15-0.35, 0.3-0.8, ≤0.015, ≤0.005, 3.25-3.7 respectively; limits for d=3a, impact temperature, and minimum impact energy are –104°C, 48J, and ≤0.12, ≤0.05 respectively. The mechanical properties of 08Ni3DR include yield strength, tensile strength, elongation after fracture, bending diameter, impact temperature, and minimum impact energy – values of ≥300 Mpa, 480-610 Mpa, ≥21%, d=3a, –104°C, and 48J respectively. The delivery condition for 08Ni3DR is that the steel plates are delivered in a quenched and tempered state. To improve the toughness of steel, intermediate heat treatment (secondary quenching) can also be carried out. Steel plates with a thickness of no more than 12 mm can also be delivered in a condition of two times normalizing followed by tempering, with the tempering temperature being no less than 540°C. Application areas of 08Ni3DR: It is widely used in industries such as petroleum, chemicals, power plants, and boilers, for manufacturing equipment and components such as reactors, heat exchangers, separators, spherical tanks, gas-free tanks, liquefied gas tanks, pressure vessels for nuclear reactors, boiler drum, liquefied petroleum gas cylinders, high-pressure water pipes in hydroelectric stations, and turbine casings.