1. Standard Designations

• UNS: S20100

• ASTM: A240/A240M (for sheet/plate), ASTM A666 (for sheet, strip, and plate)

• GB/T: 12Cr17Mn6Ni5N

2. Chemical Composition (% by weight)

3. Mechanical Properties (at Room Temperature, for Annealed Condition)

*(Note: 201 coil can be supplied in various tempers (e.g., 1/4H, 1/2H, Full Hard) to achieve significantly higher strength and hardness for specific applications.)*

4. Physical Properties (Typical)

5. Corrosion Resistance

• General Corrosion: Moderate resistance to atmospheric exposure and mild environments. It is not recommended for use in acidic, chloride-rich (e.g., coastal areas), or industrial chemical environments.

• Pitting & Crevice Corrosion: Limited resistance due to lower overall alloy content and absence of molybdenum.

• Intergranular Corrosion: Can be susceptible to sensitization in the as-welded condition. The low-carbon version 201L is preferred for welding.

• Pitting Resistance Equivalent Number (PREN): ~16-18, which is lower than the ~19 for 304.

6. Available Product Range (Coil)

7. Common Surface Finishes for Coil

• 2B: A smooth, slightly reflective, matte finish. This is the most common and standard finish for stainless steel coils, achieved by a final light cold-roll pass (skin-pass) after annealing and pickling.

• BA (Bright Annealed): A smooth, highly reflective, mirror-like finish achieved by annealing in a controlled atmosphere furnace.

• No. 4 (Hairedline): A consistent satin finish with continuous abrasive lines, obtained by mechanical polishing with abrasive belts.

8. Typical Applications

• Decorative & Architectural: Interior trim, elevator panels, handrails, and kitchen equipment.

• Household Appliances: Sinks, dishwasher liners, refrigerator inner panels, and microwave oven cavities.

• Consumer Products: Food serving equipment, hollowware, cookware, and tableware.

• Automotive: Mufflers and decorative trim.