420 Stainless Steel Square Bar Overview The 420 stainless steel square bar is a high-performance, heat-treatable chromium steel known for its exceptional hardness, wear resistance, and corrosion resistance. This premium material achieves optimal performance through specialized heat treatment processes, making it ideal for applications requiring durability and precision. Its ability to be oil-quenched and polished further enhances its mechanical properties and surface finish. Key Features High Hardness and Wear Resistance: Achievable through heat treatment. Excellent Corrosion Resistance: Performs well in polished conditions. Superior Surface Finish: Ideal for applications requiring aesthetic appeal. Good Ductility in Annealed State: Easy to machine and fabricate. Precise Dimensional Stability: Ensures reliability in precision applications. Chemical Composition (Weight %) Element Cr C Mn Si P S Fe Percentage 12.0-14.0 0.15-0.40 ≤1.00 ≤1.00 ≤0.04 ≤0.03 Balance Mechanical Properties Condition Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HRC) Annealed 700 - 850 550 20 ≤25 Quenched & Tempered 770 - 930 620 15 50 - 55 Specifications and Dimensions Standard Dimensions Size (mm) Length (mm) Tolerance (mm) Surface Finish 10 x 10 3000 - 6000 ±0.1 Bright / Polished 20 x 20 3000 - 6000 ±0.2 Bright / Polished 30 x 30 3000 - 6000 ±0.3 Bright / Polished 50 x 50 3000 - 6000 ±0.5 Bright / Polished Available Standards Standard Description ASTM A276 Standard specification for stainless steel bars and shapes. UNS S42000 Unified Numbering System designation for 420 stainless steel. AMS 5513 Aerospace Material Specification for stainless steel sheet and strip. Heat Treatment Properties The 420 stainless steel square bar can be heat-treated to achieve optimal hardness and wear resistance: Oil Quenching: Heated to 982°C – 1066°C followed by oil quenching. Tempering: Tempered at 150°C – 370°C to achieve desired hardness and toughness. Annealing: Softened for machining by heating to 840°C – 900°C and slow cooling. Corrosion Resistance The 420 stainless steel square bar performs well in the following environments: Fresh Water Atmospheric Exposure Food Processing Applications Mild Alkalis and Acids Steam Environments Crude Oil and Gasoline Sterilizing Solutions Applications The 420 stainless steel square bar is widely used in industries requiring high hardness, wear resistance, and precision. Common applications include: Precision Machinery Components High-Performance Bearings Electrical Equipment Precision Instruments Measuring Devices Transportation Vehicle Parts Professional Cutlery Specialized Tools Key Features Superior Hardness: Achieves high hardness levels through heat treatment. Enhanced Wear Resistance: Ideal for high-stress applications. Excellent Polishability: Suitable for aesthetic and functional finishes. Reliable Performance: Performs well in corrosive and high-wear environments. Conclusion The 420 stainless steel square bar is a premium material designed for applications requiring exceptional hardness, wear resistance, and corrosion resistance. Its versatility and performance make it a preferred choice for industries such as precision engineering, tool manufacturing, and food processing. Whether for bearings, cutlery, or machinery components, 420 stainless steel delivers unmatched reliability and durability. Additional Information Heat Treatment Options Annealing: Softens the material for machining. Quenching & Tempering: Enhances hardness and wear resistance. Polishing: Improves surface finish and corrosion resistance. Surface Finish Options Bright: Smooth and reflective finish. Polished: High-gloss finish for aesthetic applications. Black: Oxidized finish for added protection. Let us help you find the perfect 420 stainless steel square bar solution for your project!