630 Stainless Steel – Composition, Properties, and Uses

630 stainless steel, also known as 17-4PH stainless steel, is a precipitation-hardening stainless steel. With its unique composition, excellent performance, and wide range of uses, 630 stainless steel occupies an important position in multiple fields. In today’s post, I will introduce 630 stainless steel in detail from three aspects: composition, properties, and uses.

630 Stainless Steel – Composition, Properties, and Uses

630 Stainless Steel – 1. Composition：

The main components of 630 ss include elements such as chromium, nickel, copper, and niobium. The precise ratio of these elements gives 630 ss its unique properties.

Among them, the content of chromium is usually between 15% and 18%, which can improve the corrosion resistance and oxidation resistance of the material. Nickel content is about 4%, which helps to enhance the toughness and ductility of the material. The addition amount of copper is 3% to 5%.

Through aging treatment, intermetallic compounds can be precipitated and the strength and hardness of the material can be significantly improved. In addition, the trace addition of niobium can refine the matrix structure and improve the strength and toughness of the material.

630 Stainless Steel – 2. Properties：

1. Strength and hardness: After aging treatment, 630 ss has high strength and high hardness, giving it excellent load-bearing capacity in engineering applications.
2. Corrosion resistance: Due to the high content of chromium and nickel, 630 stainless steel shows good corrosion resistance in a variety of environments, especially in the marine environment, chemical industry, petroleum, and other fields.
3. Toughness and ductility: The addition of nickel makes 630 ss have good toughness and ductility, allowing the material to absorb more energy when subjected to external forces, improving the safety of the structure.
4. Processing performance: 630 ss has good processing performance and can be processed through various processes such as heat treatment, cold working, and welding to meet the needs of various complex structures.
5. Wear resistance: Due to the high hardness of the material and good wear resistance, 630 stainless steel performs well in situations with large friction and wear, such as bearings, gears, and other components.

630 Stainless Steel – 3. Uses：

1. Oil and Gas Industry: 630 ss is widely used in the oil and gas industry for components such as oil well pipes, valves, flanges, and fasteners, and is favored for its excellent corrosion resistance and high strength.
2. Chemical and pharmaceutical industry: In the chemical and pharmaceutical fields, 630 ss is widely used in key equipment such as reactors, storage tanks, pipelines, and pumps due to its good corrosion resistance and wear resistance.
3. Aerospace field: 630 ss is widely used in the aerospace field due to its high strength, lightweight, and corrosion resistance, such as engine parts, structural frames, and fasteners.
4. Medical and bioengineering: The biocompatibility and corrosion resistance of 630 ss make it an ideal material in the medical and bioengineering fields, such as artificial joints, dental implants, and surgical instruments.
5. Mechanical and automotive engineering: In mechanical and automotive engineering, the high strength, wear resistance and good processing properties of 630 ss make it the material of choice for components such as bearings, gears, pumps, and valves.

Conclusion

To sum up, 630 stainless steel plays an important role in many fields with its unique composition, excellent performance, and wide range of uses.

Thank you for reading our article and we hope you’ve enjoyed it. If you are looking for 630 stainless steel suppliers online, please don’t hesitate to contact Sino Stainless Steel.

As a leading supplier of stainless steel products across the world, Sino Stainless Steel provides customers with high-quality cold-rolled stainless steel sheets, colored stainless steel sheets, stainless steel pipes, stainless steel strips, stainless steel plates, stainless steel bars, and stainless steel tubes at an extremely competitive price.