Product Introduction of 440B Stainless Steel Round Pipe Our 440B stainless steel round pipe is a high - carbon martensitic stainless steel product, renowned for its outstanding performance characteristics. As a member of the martensitic stainless steel family, it strikes an optimal balance among various properties, offering distinct advantages: Higher Hardness than 440A Steel: This gives it enhanced wear - resistance and the ability to maintain its shape and integrity under heavy use. Superior Toughness Compared to 440C Steel: Ensuring it can withstand impacts and mechanical stress without fracturing easily. Excellent Wear Resistance: Making it suitable for applications where friction and abrasion are common. Moderate Corrosion Resistance: Thanks to its high chromium content, it can resist corrosion in many environments, although it is not as corrosion - resistant as some austenitic stainless steels. Outstanding Strength Retention: Maintains its strength even under harsh conditions, providing long - term reliability. Chemical Composition and Specifications of 440B Stainless Steel Round Tubes The composition of our 440B stainless steel round pipe adheres strictly to standards set by AISI and ASTM, with the UNS number S44003. The key chemical components are as follows: Chemical Component Percentage Range Carbon (C) 0.75 - 0.95% Chromium (Cr) 16.0 - 18.0% Manganese (Mn) ≤1.00% Silicon (Si) ≤1.00% Phosphorus (P) ≤0.04% Sulfur (S) ≤0.03% Molybdenum (Mo) ≤0.75% Product Specifications (Size Table) To help you choose the right 440B stainless steel round pipe for your project, here is a table presenting the key size specifications. Please note that custom sizes are also available upon request. Specification Details Outer Diameter Range 6mm - 200mm Wall Thickness Range 0.5mm - 10mm Standard Length 6m (Custom lengths can be arranged) Common Applications of 440B Stainless Steel Round Pipe Cutting Tools: Its high hardness and wear resistance make it an ideal material for manufacturing cutting tools that need to maintain a sharp edge for a long time. Precision Measuring Instruments: The excellent dimensional stability and corrosion resistance ensure accurate measurements in various environments. High - performance Bearings: Can withstand high loads and rotational speeds, providing reliable performance in bearing applications. Industrial Valves: Resists corrosion from various industrial fluids and has the strength to operate under high - pressure conditions. Specialized Blade Applications: Whether it's for blades in industrial machinery or certain types of knives, the 440B stainless steel round pipe offers the right combination of hardness and toughness. Like all stainless steel round pipes, the 440B grade owes its corrosion resistance to its high chromium content (minimum 10%). This particular grade falls into the martensitic category of stainless steels, one of the three main crystalline structures, along with austenitic and ferritic types. For those in search of a balance between durability and performance, 440B stainless steel round pipes offer an outstanding combination of strength, wear resistance, and moderate corrosion protection. They are thus the perfect choice for specialized industrial applications where reliability and long - term performance are crucial. If you have any further questions or need more information, please don't hesitate to contact our expert team.