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    Физические и химические свойства:

Физические свойства

Появление:

It usually presents a silvery white metallic color, with a smooth surface and high gloss. Different surface effects can be obtained through different surface treatment processes, such as mirror polishing, brushing, etc. Stainless steel threaded rods are often used in structural applications where their aesthetic appeal and corrosion resistance are highly valued.

Плотность:

The density is generally between 7.93-8.00g/cm³. For example, the density of the commonly used 304 stainless steel threaded rod is about 7.93g/cm³, and the density of the 316 stainless steel threaded rod is about 7.98g/cm³, which is slightly higher than ordinary carbon steel.

Температура плавления:

Температура плавления относительно высока, обычно около 1398-1454℃. Например, температура плавления нержавеющей стали 304 составляет около 1400-1450℃, что обеспечивает ей хорошую стабильность в условиях высоких температур.

Коэффициент теплового расширения:

The coefficient of thermal expansion is relatively small. In the range of room temperature to 100℃, the coefficient of thermal expansion of 304 stainless steel is about 17.2×10⁻⁶/℃. This feature enables stainless steel threaded rods to maintain good dimensional stability in an environment with large temperature changes.

Теплопроводность:

Теплопроводность низкая, коэффициент теплопроводности составляет около 16–27 Вт/(м·К), что значительно ниже, чем у меди, алюминия и других металлов, поэтому он обладает определенными теплоизоляционными характеристиками.

Электропроводность:

Он имеет определенную электропроводность, но проводимость относительно низкая. Проводимость нержавеющей стали 304 составляет около 1,4×10⁶ См/м, что составляет всего около 4% проводимости меди.

Химические свойства

Коррозионная стойкость:

This is one of the most important chemical properties of stainless steel threaded rods. Because a dense passivation film can be formed on its surface, this passivation film can prevent oxygen, water, etc., from contacting the metal matrix, thereby effectively preventing corrosion. For example, 304 stainless steel has good corrosion resistance in environments such as atmosphere, water, and weak acids and alkalis; 316 stainless steel contains molybdenum, which is more resistant to chloride ion corrosion and is often used in marine environments or chemical environments that are exposed to chloride ions.

Антиоксидантное действие:

Stainless steel threaded rods have good oxidation resistance at both room temperature and higher temperatures. For example, 310S stainless steel threaded rods can withstand high temperatures in high-temperature environments without being easily oxidized and can be used in high-temperature furnace structures and other occasions.

Химическая стабильность:

In general chemical media, stainless steel threaded rods have high chemical stability and are not easy to react chemically with common chemicals. However, in some specific strong corrosive media, such as concentrated nitric acid, hydrofluoric acid, etc., the corrosion resistance of stainless steel threaded rods may be affected.

Пассивация:

After the stainless steel threaded rod is in the air or after passivation treatment, a passivation film will form on the surface. This passivation film can improve the corrosion resistance and oxidation resistance of stainless steel. Passivation treatment usually involves immersing the stainless steel threaded rod in a solution containing an oxidant, such as nitric acid, potassium dichromate, etc., to promote the formation and repair of the passivation film.

Приложение:

Stainless steel threaded rods are widely used in many fields due to their excellent corrosion resistance, high strength, and good processing performance. In the field of construction, they are used to manufacture structural supports, frames, and reinforcements, ensuring durability and aesthetic appeal. In building decoration, they are often used for window frames, door frames, handrails, and artistic sculptures, combining beauty with long service life. In mechanical manufacturing, they can be used as fasteners, anchor bolts, and connecting components to ensure stable operation of machinery. In the food processing industry, stainless steel threaded rods are used to construct equipment frames, conveyor systems, and storage racks, meeting strict hygiene standards. In addition, in the fields of chemical equipment, electronic appliances, etc., stainless steel threaded rods are also indispensable. They are used to manufacture structural supports for reactors, frames for valves, and housings for electronic equipment, adapting well to complex working environments.