S20100 Austenitic Stainless Steel Plate & Coil
Austenitic 201 (S20100) Stainless Steel Plate/Coil – High Strength & Formability
In-depth data sheet for austenitic 201 (UNS S20100) stainless steel plate and coil according to ASTM A240. Covers chemical composition, mechanical properties, thermal & electrical performance, international equivalents, and typical applications.
Cold rolling, hot rolling, forming, deep drawing, welding, bending, stamping
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S20100 Austenitic Stainless Steel Plate & Coil Introduction
Austenitic 201 stainless steel (UNS S20100) is a chromium-manganese-nickel alloy designed to conserve nickel while delivering mechanical properties comparable to Type 301. It is characterized by its high work-hardening rate, excellent toughness, and good corrosion resistance in mild environments. In the annealed condition it is non-magnetic but becomes slightly magnetic after cold working.
- Key attributes: high yield and tensile strength, excellent formability, and attractive surface finish.
- Commonly supplied as cold-rolled or hot-rolled plate, sheet, and coiled strip.
- Widely used in architectural, kitchen equipment, and transportation applications where a balance of strength, aesthetics, and cost is required.
S20100 Austenitic Stainless Steel Plate & Coil Chemical Composition
Chemical limits as specified in ASTM A240/A240M for UNS S20100. All values are weight percent (wt%) maxima unless a range is indicated. Iron constitutes the remainder.
| Element | Standard Value | Notes |
|---|---|---|
| Carbon (C) | 0.15 max | |
| Manganese (Mn) | 5.50 – 7.50 | Essential austenite stabilizer |
| Phosphorus (P) | 0.060 max | |
| Sulfur (S) | 0.030 max | Low sulfur for improved weldability |
| Silicon (Si) | 1.00 max | |
| Chromium (Cr) | 16.0 – 18.0 | Primary corrosion resistance element |
| Nickel (Ni) | 3.50 – 5.50 | Austenite stabilizer |
| Nitrogen (N) | 0.25 max | Strengthener and austenite former |
| Iron (Fe) | Balance |
S20100 Austenitic Stainless Steel Plate & Coil Thermal & Electrical Physical Properties
Physical properties at ambient and elevated temperatures for austenitic 201 stainless steel in the annealed condition. Values are typical as published in materials handbooks; they are not part of the ASTM A240 specification. Magnetic permeability remains low (<1.02) in the annealed state.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.80 | g/cm³ | 20°C |
| Melting Range | 1400 – 1450 | °C | - |
| Modulus of Elasticity (E) | 193 | GPa | 20°C |
| Shear Modulus (G) | 77 | GPa | Calculated from E and ν |
| Poisson's Ratio (ν) | 0.30 – 0.31 | - | Ambient |
| Thermal Expansion Coefficient (α) | 15.9 | µm/m·°C | 20 – 100°C |
| Thermal Expansion Coefficient (α) | 17.5 | µm/m·°C | 20 – 500°C |
| Thermal Conductivity (λ) | 16.2 | W/m·K | 100°C |
| Thermal Conductivity (λ) | 21.5 | W/m·K | 500°C |
| Specific Heat Capacity | 500 | J/kg·K | 0 – 100°C |
| Electrical Resistivity (ρ_e) | 69 | µΩ·cm | 20°C |
| Magnetic Permeability (μ_rel) | ≤ 1.02 | - | Annealed condition |
S20100 Austenitic Stainless Steel Plate & Coil Mechanical Properties
Minimum mechanical property requirements for annealed plate/sheet/coil according to ASTM A240. Properties are measured at room temperature in the longitudinal direction.
- Elongation is determined using a 50 mm (2 in) gauge length.
- Hardness may be reported as either Rockwell B or Brinell.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | 655 min | MPa | Room temperature |
| Yield Strength (ReH) 0.2% offset | 260 min | MPa | Room temperature |
| Elongation (A) | 40 min | % | 50 mm gauge length |
| Hardness | 100 max | HRB | Room temperature |
| Hardness | 241 max | HBW | Room temperature |
| Bend Test (180°) | d = 2a | - | Thickness ≤ 12.7 mm; no cracks |
S20100 Austenitic Stainless Steel Plate & Coil Fully Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade/Designation | Notes |
|---|---|---|---|
| USA | ASTM A240/A240M | 201 (UNS S20100) | Base reference; also covered in ASME SA-240 for pressure vessels |
| Japan | JIS G4304/G4305 | SUS201 | Virtually identical chemistry and properties |
| Europe | EN 10088-2 | X12CrMnNiN17-7-5 (1.4372) | Full counterpart in the European system |
| International | ISO 15510 | X12CrMnNiN17-7-5 | Harmonized grade |
| China | GB/T 20878 / GB/T 3280 | 12Cr17Mn6Ni5N | Domestic equivalent, minor tolerance adjustments possible |
| India | IS 6911 | ISS 201 | Indian standard implementation |
S20100 Austenitic Stainless Steel Plate & Coil Application Introduction
201 (S20100) stainless steel sheet and coil are widely adopted where a combination of mechanical strength, moderate corrosion resistance, and lower cost compared to conventional 300-series grades is desired. It can be formed, welded, and polished without difficulty. Typical service environments include indoor architectural elements, mild atmospheric exposure, and occasional contact with dilute acids, water, and cleaning agents.
- Not recommended for severe chloride environments (e.g., marine immersion) or reducing acids at elevated temperatures.
- Readily fabricated into finished goods using standard stainless steel processing routes.
Product Applications: Decorative panels and trim, Kitchen sinks and countertops, Refrigerator and dishwasher bodies, Automotive body molding and hub caps, Railway carriage panels and luggage racks, Fasteners and springs (after cold working)
Processed into products: Deep-drawn sink bowls, Stamped door panels, Roll-formed profiles for windows and doors, Welded tubular handrails, Precision cold-rolled strips for small springs, Support brackets and light structural sections
Application industries: Architecture and Construction, Food Service and Catering Equipment, Home Appliances, Automotive and Transportation, General Engineering
S20100 Austenitic Stainless Steel Plate & Coil Similar / Alternative Material Recommendations
| Country/Region | Standard | Grade/Designation | Notes |
|---|---|---|---|
| USA | ASTM A240 | 202 (S20200) | Higher Mn and Ni content; slightly lower strength but improved corrosion resistance in some media |
| Europe | EN 10088-2 | X12CrMnNiN18-8-5 (1.4373) | Corresponds to 202; better formability for deep-drawn parts |
| Global | - | 301 (S30100) | Conventional chromium-nickel austenitic; higher Ni, lower Mn; work-hardens similarly but often with superior corrosion resistance |
| Global | - | 304 (S30400) | Standard 18/8 stainless; superior corrosion resistance but higher cost due to nickel; often substituted by 201 in cost-sensitive applications where mild corrosion resistance is acceptable |
Notes:
- Welding: Grade 201 can be welded using common fusion techniques (GTAW, GMAW, resistance welding) with low heat input. Matching or slightly over-alloyed filler metals (e.g., ER308/ER308L) are often recommended to preserve corrosion resistance.
- Heat treatment: Solution annealing at 1010–1120°C followed by rapid cooling. Stress relieving is seldom performed because it may induce intergranular corrosion sensitivity in the sensitization range (450–900°C).
- Cold working: Excellent cold formability; the grade can achieve very high strength levels (up to ~1200 MPa tensile) after severe cold reduction, making it suitable for springs and flat wire.
- Magnetism: The material is non-magnetic in the annealed condition but may become slightly magnetic after heavy cold deformation – a normal characteristic of metastable austenitic stainless steels.
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