NM500 steel plate is a high-strength, wear-resistant steel plate made from high-carbon alloy steel. The chemical composition of NM500 steel plate primarily includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), and molybdenum (Mo). The optimal balance of these elements ensures NM500 steel plate's excellent wear resistance and mechanical properties. The carbon content directly affects the plate's hardness and strength, while elements like silicon and manganese contribute to its toughness and impact resistance.

Performance Characteristics of NM500 Steel Plate
1. High Strength: With a yield strength exceeding 500 MPa, NM500 steel plate offers high load-bearing capacity and impact resistance, meeting the structural requirements of various heavy machinery and buildings.
2. High Wear Resistance: The surface of NM500 steel plate undergoes special heat treatment and alloying, resulting in high hardness and wear resistance, effectively resisting various types of wear and corrosion.
3. High fatigue resistance: The material of NM500 steel plate has undergone fine tissue processing and heat treatment, and has high fatigue resistance, and can maintain high stability and durability under repeated loads.

Q235 steel is a common carbon structural steel. Its yield point is 235 MPa. Its elongation is 21-26%.

20# steel is a high-quality carbon structural steel with a precisely controlled carbon content (0.17%-0.24%). The normalized yield point of 20# steel is 245 MPa, with an elongation >25%, and the quenched and tempered yield point is 280 MPa, with an elongation >22%.

Although the yield strengths of Q235 and 20# steel are similar (the standard yield strength of Q235 is 235 MPa, while that of 20# steel is around 245 MPa), 20# steel exhibits slightly better tensile strength and elongation. 20# steel also offers better weldability.

Q235 is a carbon structural steel, and 20# steel is more expensive than Q235 steel.

In the construction and industrial sectors, high-quality steel is a key material for withstanding mechanical loads and environmental factors, with round pipes being popular for their excellent performance. Often manufactured from carbon steel, alloy steel or cast iron, these pipes are characterized by high strength and corrosion resistance, making them suitable for a wide range of scenarios.

Core characteristics of round pipes

The most distinctive feature of round pipes is their round cross-section, which is available in a wide range of sizes (diameters of 15-100 mm and lengths of up to 7,000 mm) to meet different engineering requirements. The wall thickness (up to more than 12 mm) directly affects its load-bearing capacity and needs to be selected according to the actual application environment (e.g. temperature, pressure, etc.).

Surface treatment processes are varied and include:

Mechanical polishing: abrasives of different grit sizes are used to eliminate surface defects, and the finish can be further optimized by polishing paste.

Chemical polishing: utilizing acidic solutions to form a smooth protective layer.

Electrochemical polishing: Enhancement of surface corrosion resistance by means of an electrolytic process.

Hot-dip galvanizing: Forms a zinc layer on the surface to enhance rust resistance.

Main Application Areas

Oil & Gas: Used to transport oil and gas resources to ensure the safety and stability of media transportation.

Construction engineering: as a frame structure or support member, widely used in industrial plants, civil buildings and temporary facilities (such as pavilions, garages, etc.).

Water supply and heating system: suitable for hot and cold water pipelines and sewage treatment facilities, taking into account the needs of indoor and outdoor installation.

Chemical industry: stainless steel round pipe can withstand acid, alkali and other corrosive media, commonly used in chemical transportation.

Mechanical manufacturing and transportation: used in aviation, automotive and heavy equipment manufacturing, to meet the demand for high-strength, lightweight.

Decorative and auxiliary uses: small round tube can be used for railings, furniture and other decorative structures, both functional and aesthetic.

Round tubes have become an indispensable key material in modern industry and construction due to their excellent mechanical properties, various surface treatment technologies and wide application adaptability.