SUS630 17-4PH X5CrNiCuNb16-4 Stainless Steel Plate Q+T With Heat Treatment H1075 HRC 40-50

SUS630 17-4PH Stainless Steel Plate Q+T With Heat Treatment H1075 HRC 40-50

What is 630 Stainless Steel?

630 stainless steel, also known as 17-4 PH or 17-4 Precipitation Hardening steel, is a martensitic stainless steel containing approximately 15–17% chromium and 3–5% nickel. Due to its precipitation-hardening characteristics, it has excellent corrosion resistance and superior strength at high hardening depths. It can be used in applications requiring good mechanical properties at elevated temperatures up to 600°F (316°C).

630 Stainless Steel Composition

630 stainless steel, also known as 17-4PH or 630 Martensitic Stainless Steel, boasts of chromium, nickel, and copper constitutions, with little molybdenum and niobium. The unique composition of this stainless steel gives it excellent strength and toughness, which makes it highly desirable in the industries mentioned earlier. Specifically, the copper and nickel in the steel give it superior toughness, while the chromium content provides excellent corrosion resistance properties.

630 Stainless Steel Physical Properties

630 Stainless Steel Mechanical Properties

Mechanically, 630 stainless steel exhibits several characteristics that make it stand out among other stainless steel grades. This steel is highly resistant to stress corrosion and crevice corrosion. The alloy’s presence of copper and nickel makes it highly resistant to general corrosion. As for its physical properties, 630 stainless steel has a density of 7.75g/cm3, a melting point of 1370 – 1420℃, and a specific heat capacity of 480 J/kgK.

630 Stainless Steel Specifications

630 Stainless Steel Uses

Its high strength and superior mechanical and physical properties make it ideal for applications that require high strength, toughness, and corrosion resistance alongside high-temperature resistance. It finds its application in aerospace, chemical processing, power generation, and automotive industries. In the automotive industry, 630 stainless steel is commonly used for engine parts, transmission gearboxes, and hydraulic lines.

630 Stainless Steel Corrosion Resistance

Regarding corrosion resistance, 630 stainless steel is highly corrosion-resistant, thanks to its high chromium and copper content. Nevertheless, its corrosion resistance properties are enhanced when heat-treated using the appropriate heat treatment process. Speaking of heat treatments like quenching, tempering, and annealing all have different effects on the properties of 630 stainless steel.

630 Stainless Steel Machining

As for machining and welding considerations, 630 stainless steel can be challenging to machine and weld adequately. This is a result of the steel hardening during the machining process. However, this can be mitigated using special techniques like proper coolant or lubrication, slow speeds, and sharp tools.

630 Stainless Steel Welding

On the other hand, welding 630 stainless steel requires preheating and post-weld heat treatment to prevent cracking and maintain its mechanical and physical properties.

Company Overview ：

The company has an indoor warehouse of 5000 square meters and an open warehouse of 4000 square meters, which can fully meet the temporary turnover and phased storage of customers' steel pipe reservation.

The subordinate processing plant has 6 sets of medium frequency heating fully automatic thermal expansion units, 5 sets of fully automatic groove processing machines, 1 set of processing and drying integrated painting equipment imported from Germany, 1 set of streamlined anti-corrosion processing equipment and 1 set of streamlined thermal insulation processing equipment; The steel pipe can be processed, cut, hot expanded or cold drawn according to the needs, so as to fully meet the customized needs of users.

Main products :

We can supply various kinds of metal material, like carbon steel seamless pipe, alloy tube, fertilizer tube, spiral tube, ductile iron pipe, cryogenic tube, special pipe for cold storage and galvanized Steel.
Our products can be used in various applications over a wide range of industries, like chemical, petrochemical, oil and gas, pharmaceutical, food processing, power generation, aviation, marine and so on.

Sales Performance and Network :

The annual sales volume of the company is more than 300000 tons, and the sales volume has reached new highs. The company has formed a complete sales service system based on East China and facing customers all over the country. The company has a good reputation, high-quality products, strong strength, low price reputation in the country, products are deeply dependent on users. The company's products not only sell well in the domestic market, but also sell well in the United States, Canada, Colombia, the United Arab Emirates, Thailand, India, Vietnam, Pakistan, South Korea, Japan, Russia and other countries and regions, and are well received by foreign customers. The number of export countries is growing, and the sales volume is gradually increasing.