Products

Both 20MnG and 25MnG seamless steel pipes belong to the category of alloy steel pipes for boilers, primarily used in the heating surface piping of high-temperature, high-pressure equipment. Their material systems are similar, both being carbon steel with added manganese for strengthening, improving the pipe's strength, toughness, and heat resistance. However, due to differences in carbon content, the two types of steel pipes differ in strength, plasticity, processing performance, and applicable environments.

20G seamless steel pipes come in a wide range of specifications, and leading Chinese manufacturers can provide different outer diameters and wall thicknesses according to customer needs. Common outer diameters include φ25mm, φ32mm, φ38mm, φ42mm, φ51mm, φ57mm, φ60mm, φ76mm, φ89mm, φ108mm, φ133mm, φ159mm, and φ219mm, etc., while common wall thicknesses include 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, and above. For example, commonly used specifications include 38×3mm, 51×5mm, 60×6mm, 76×8mm, 89×10mm, 108×8mm, and 159×10mm. As a professional source supplier, when making actual purchases, users need to select the appropriate specifications based on the equipment's working pressure, temperature, installation requirements, and applicable standards. We can also provide processing services such as length cutting, flaw detection, and performance testing according to project needs.

35CrMoV seamless steel pipe manufacturers offer a wide range of specifications and can customize production according to customer equipment requirements. Common outer diameter specifications include φ16mm, φ20mm, φ25mm, φ32mm, φ42mm, φ48mm, φ57mm, φ60mm, φ73mm, φ89mm, φ108mm, φ133mm, φ159mm, φ180mm, φ219mm, φ273mm, and φ325mm, etc. Some manufacturers can also produce larger diameter specifications. Wall thicknesses typically range from 2mm to over 50mm, with common specifications including φ42×5mm, φ60×8mm, φ89×10mm, φ108×12mm, φ159×16mm, and φ219×20mm.

27SiMn seamless steel pipe is a low-alloy, high-strength alloy steel pipe. It mainly improves the strength, toughness, and hardenability of the steel by adding alloying elements such as silicon and manganese. Compared to ordinary 20# seamless steel pipe, 27SiMn has a higher load-bearing capacity; compared to ordinary structural steel pipe, it exhibits greater stability under impact and repeated stress.

Manufacturers of 16Mn seamless steel pipes offer a range of specifications from small diameters (φ25mm) to large diameters (φ426mm and above), with wall thicknesses covering 3mm to over 30mm. They are mainly used in engineering structures, machinery manufacturing, bridge construction, pressure equipment, and industrial transportation.

Cr9Mo seamless steel pipe is a common name, generally referring to two mainstream 9% chromium-based heat-resistant steels in industrial applications: one is the basic 12Cr9MoI (or 12Cr9MoNT), and the other is the higher-performance T91/P91 (10Cr9Mo1VNb). Due to their approximately 9% chromium content, they possess excellent high-temperature resistance and corrosion resistance, making them key materials for high-temperature and high-pressure applications.