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  • 201 Stainless Steel Plate

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201 Stainless Steel Plate
201 stainless steel is a chromium-nickel-manganese austenitic stainless steel. It was developed as a cost-effective alternative to 304 stainless steel, where nickel (Ni) is partially replaced by manganese (Mn) and nitrogen (N) to maintain the austenitic structure. While it offers good strength and formability, its corrosion resistance is generally lower than that of 304, making it suitable for less aggressive environments.
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◉ PRODUCT SPECIFICATION


1. Standard Designations


  • UNS: S20100

  • ASTM: A240/A240M

  • GB/T: 12Cr17Mn6Ni5N (Old designation: 1Cr17Mn6Ni5N)


2. Chemical Composition (% by weight)


Element

Carbon (C)

Silicon (Si)

Manganese (Mn)

Phosphorus (P)

Sulfur (S)

Chromium (Cr)

Nickel (Ni)

Nitrogen (N)

Min.

-

-

5.50

-

-

16.00

3.50

0.15

Max.

0.15

1.00

7.50

0.060

0.030

18.00

5.50

0.25


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


Property

Yield Strength (0.2% Offset)

Tensile Strength

Elongation (in 2")

Hardness (Brinell)

Hardness (Rockwell B)

Value

≥ 275 MPa (40 ksi)

≥ 655 MPa (95 ksi)

≥ 40%

≤ 241 HBW

≤ 100 HRB

(Note: 201 typically has a higher yield strength and hardness compared to 304, but lower ductility.)


4. Physical Properties (Typical)


Property

Value

Density

7.80 g/cm³ (0.282 lb/in³)

Melting Range

1399 - 1421 °C (2550 - 2590 °F)

Modulus of Elasticity

200 GPa (29 x 10⁶ psi)

Thermal Conductivity (100°C)

16.3 W/m·K

Coefficient of Thermal Expansion (20-100°C)

16.5 x 10⁻⁶ /K


5. Corrosion Resistance


  • General Corrosion: Moderate resistance to atmospheric corrosion and mild oxidizing environments. It is not recommended for use in acidic, chloride-rich, or harsh chemical environments where 304 or 316 would be specified.

  • Pitting & Crevice Corrosion: Resistance is limited due to lower chromium and nickel content, and the absence of molybdenum.

  • Intergranular Corrosion: Susceptible to sensitization in the as-welded condition due to its carbon content. For welded applications, the low-carbon version 201L is recommended.

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


6. Available Product Range (Plates)


Parameter

Standard Range (May vary by supplier)

Thickness

0.5 mm (0.02") to 50 mm (2")

Width

1000 mm (39"), 1219 mm (48"), 1500 mm (59"), etc.

Length

2000 mm (79"), 2438 mm (96"), 3000 mm (118"), etc.

Common Surface Finishes

No. 1: Hot-rolled, annealed & pickled (dull, matte)
2B: Cold-rolled, annealed & pickled, then skin-pass rolled (smooth, slightly reflective)
BA: Bright Annealed (smooth, highly reflective)
No. 4: Brushed (directional satin)
No. 8: Mirror (highly reflective polish)


7. Typical Applications


  • Decorative & Architectural: Interior trim, wall panels, handrails, and elevator interiors.

  • Household Appliances: Sinks, kitchenware, dishwasher liners, and decorative parts.

  • Automotive: Mufflers and decorative trim (non-structural).

  • Consumer Products: Food serving equipment, hollowware, and cookware where high corrosion resistance is not critical.

◉ Surfcae selection

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SURFACE CHARACTERISTIC SUMMARY OF MANUFACTURING METHOD APPLICATION
NO.1 Silvery white Hot rolled to specified thickness Do not need to have a glossy surface use
lackluster
NO.2D Silvery white After cold rolling, heat treatment and pickling are carried out General material, deep material
NO.2B Gloss is stronger than No.2D After No.2D treatment, the final light cold rolling is carried out through the polishing roller The general material
BA As bright as a sixpence No standard, but usually a bright annealed surface with high reflectivity. Building materials, kitchen utensils
NO.3 Rough lapping Grind with 100~200# (unit) strop tape Building materials, kitchen utensils
NO.4 Intermediate grinding Polished surface obtained by grinding with 150~180# strop abrasive tape Building materials, kitchen utensils
NO.240 Fine lapping Grinding with 240# strop abrasive tape kitchenware
NO.320 Very fine grinding Grinding was carried out with 320# strop abrasive tape kitchenware
NO.400 The luster is close to BA Use 400# polishing wheel to grind General timber, building timber, kitchen appliances
HL Hairline grinding Suitable particle material for hair stripe grinding (150~240#) with many grains Building, construction material
NO.7 It's close to mirror grinding Use a 600# rotary polishing wheel to grind For art or decoration
NO.8 Mirror ultrafinish The mirror is ground with a polishing wheel Reflector, for decoration

◉ PRODUCTION AND WAREHOUSING

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