440B Stainless Steel round Pipe/Tube

440B stainless steel round pipe is a high-carbon martensitic stainless steel product known for its exceptional performance characteristics. As part of the martensitic stainless steel family, 440B stainless steel round tubes offer an optimal balance of properties, featuring:

• Higher hardness than 440A steel
• Superior toughness compared to 440C steel
• Excellent wear resistance
• Moderate corrosion resistance
• Outstanding strength retention

Chemical Composition and Specifications of 440B Stainless Steel Round Tubes

The 440B stainless steel round pipe composition follows strict standards (AISI, ASTM) with UNS number S44003:

Key Chemical Components:

• 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%

Common Applications of 440B Stainless Steel Round Pipe

440B stainless steel round tubes excel in various demanding applications:

• Cutting tools
• Precision measuring instruments
• High-performance bearings
• Industrial valves
• Specialized blade applications

Like all stainless steel round pipes, 440B grade derives its corrosion resistance from its high chromium content (minimum 10%). This particular grade belongs to the martensitic category of stainless steels, one of the three main crystalline structures alongside austenitic and ferritic types.

For those seeking a balance between durability and performance, 440B stainless steel round tubes provide an excellent combination of strength, wear resistance, and moderate corrosion protection, making them ideal for specialized industrial applications.