202 (S20200) Austenitic Stainless Steel Plate & Coil
202 Stainless Steel (UNS S20200) Plate & Coil – Economical Austenitic Grade for Versatile Fabrication
In-depth technical data for 202/S20200 austenitic stainless steel plate and coil. Covers chemical composition, mechanical properties, thermal and electrical physical properties, international equivalents, and application guidance.
Hot rolling, cold rolling, annealing, pickling, skin passing, slitting, cutting to length, forming, bending, deep drawing, welding
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202 Austenitic Stainless Steel Plate & Coil Introduction
UNS S20200, commonly known as Type 202 stainless steel, is a chromium–manganese–nickel–nitrogen austenitic grade designed as a cost-effective alternative to Type 304. By substituting a portion of nickel with manganese and nitrogen, this alloy maintains an austenitic structure that delivers excellent formability, good corrosion resistance in mild environments, and higher yield strength than standard 304. It is predominantly supplied in plate, sheet, and coil form under ASTM A240/A240M in the annealed condition.
The balanced composition permits deep drawing, bending, and welding with standard procedures, making it suitable for high-volume production of kitchen equipment, automotive trim, railway car bodies, and architectural cladding. After annealing the material remains essentially non-magnetic, and its surface can be finished from 2B/BA to No.4 and beyond.
With rising nickel costs, 202 offers an attractive balance of performance and economy, enabling engineers to optimize material expenditure while retaining the fabrication advantages of an austenitic stainless steel.
202 Austenitic Stainless Steel Plate & Coil Chemical Composition per ASTM A240/A240M
The following table lists the ladle analysis limits for UNS S20200 as specified in ASTM A240/A240M. All values are maximum percentages unless a range is given. Manganese and nitrogen are the primary austenite stabilizers that replace a portion of the nickel used in grade 304, providing a cost advantage while retaining the face-centered cubic structure.
| Chemical Element | Composition (wt %) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.15 | Deoxidizer; contributes to strength |
| Manganese (Mn) | 7.50 – 10.00 | Austenite stabilizer; replaces part of Ni |
| Phosphorus (P) | ≤ 0.060 | Residual element; limited to avoid hot cracking |
| Sulfur (S) | ≤ 0.030 | Controlled for improved weldability |
| Silicon (Si) | ≤ 1.00 | Deoxidizer; aids oxidation resistance |
| Chromium (Cr) | 17.0 – 19.0 | Primary element for corrosion resistance |
| Nickel (Ni) | 4.0 – 6.0 | Austenite stabilizer; reduced vs. 304 |
| Nitrogen (N) | ≤ 0.25 | Strengthener and austenite stabilizer |
202 Austenitic Stainless Steel Plate & Coil Thermal & Electrical Physical Properties
Typical physical properties for UNS S20200 at room temperature and selected elevated temperatures are listed below. These values are representative for material in the annealed condition and may vary slightly depending on exact product form and processing history. Values are for comparison purposes and should be confirmed for critical designs.
| Property | Typical Value (Metric) | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.80 | g/cm³ | 20 °C |
| Elastic Modulus (E) | 193 | GPa | 20 °C, annealed |
| Shear Modulus (G) | 78 | GPa | Calculated from E and ν at 20 °C |
| Poisson's Ratio (ν) | 0.30 | – | 20 °C |
| Thermal Expansion (α) | 17.0 | 10⁻⁶ /°C | 20–100 °C |
| Thermal Expansion (α) | 17.5 | 10⁻⁶ /°C | 20–300 °C |
| Thermal Expansion (α) | 18.5 | 10⁻⁶ /°C | 20–500 °C |
| Thermal Conductivity (λ) | 16.3 | W/m·K | 100 °C |
| Thermal Conductivity (λ) | 21.5 | W/m·K | 500 °C |
| Specific Heat Capacity | 500 | J/kg·K | 20 °C |
| Electrical Resistivity (ρ_e) | 0.72 | μΩ·m | 20 °C |
202 Austenitic Stainless Steel Plate & Coil Mechanical Properties per ASTM A240
Minimum tensile property requirements for annealed plate, sheet, and strip are presented below. All values are transverse specimens unless otherwise noted. The high elongation values make the grade suitable for demanding deep-drawing and stretch-forming operations. Hardness is a maximum limit; typical as-annealed hardness falls in the range of 85–92 HRB.
| Property | Required Value (Metric) | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (0.2% offset) | ≥ 260 | MPa | Room temperature, annealed, gauge length 50 mm |
| Tensile Strength (Rm) | ≥ 620 | MPa | Room temperature, annealed, gauge length 50 mm |
| Elongation (A) | ≥ 40 | % | Annealed, gauge length 50 mm; thickness ≤ 19.0 mm |
| Hardness, Rockwell B | ≤ 95 | HRB | Annealed condition |
| Hardness, Brinell | ≤ 217 | HBW | Annealed condition, 3000 kg load |
202 Austenitic Stainless Steel Plate & Coil Identical Equivalent Standards & Substitute Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A240/A240M | 202 (UNS S20200) | Original specification; chemical composition as tabled |
| China | GB/T 3280, GB/T 20878 | 12Cr17Mn6Ni5N | Chemically identical; also designated 1Cr17Mn6Ni5N in older standards |
| Japan | JIS G4304, JIS G4305 | SUS202 | Identical chemistry; widely used for sheet and plate |
| International | ISO 15510:2018 | X12CrMnNiN17-7-5 | Closely matching chemistry; minor Mn range difference (5.5 – 7.5) but often interchanged for non-critical uses |
202 Austenitic Stainless Steel Plate & Coil Application Introduction
UNS S20200 is engineered for applications where moderate corrosion resistance, high toughness, and easy fabrication are required at a controlled cost. Its low nickel content makes it economically attractive for high‑volume consumer and industrial products. It is not intended for severe chloride, acidic, or high‑temperature corrosive services where 316 or duplex grades would be specified.
Typical usage spans:
Product Applications: Kitchen sinks and countertops, Cookware (pots, pans, utensils), Automotive exterior trim and wheel covers, Railway passenger car bodies and interior panels, Architectural cladding, roofing, and flashing, Appliances (dishwasher tubs, refrigerator panels), Trays, bowls, and serving ware
Processed into products: Deep-drawn sink bowls and stamped parts, Roll-formed trim strips and edge profiles, Bent brackets and structural supports, Welded enclosures and panels, Punched and perforated decorative sheets, Stretch-formed vessel segments
Application industries: Architecture & Construction, Food Service & Kitchen Equipment, Automotive, Railway Transportation, Consumer Goods & Appliances, General Metal Fabrication
202 Austenitic Stainless Steel Plate & Coil Comparable Stainless Steel Grades
| Country / Region | Standard | Grade | Description & Suitability |
|---|---|---|---|
| USA | ASTM A240 | 201 (S20100) | Lower Ni (~3.5–5.5 %) and higher Mn (~5.5–7.5 %); slightly lower corrosion resistance, used in similar cost-sensitive applications |
| USA | ASTM A240 | 304 (S30400) | Higher Ni (8.0–10.5 %); superior corrosion resistance and formability; more expensive baseline alternative |
| Europe | EN 10088-2 | 1.4371 (X12CrMnNiN17-7-5) | Mn 5.5–7.5 %; otherwise comparable chemistry; often considered a close European match for 202 |
| China | GB/T 20878 | 022Cr17Ni12Mo2 (316L) | Molybdenum-bearing grade for enhanced pitting resistance; suitable when 202 cannot meet corrosion demands |
| Japan | JIS G4304 | SUS304 | Standard 18-8 austenitic; premium alternative with wider availability |
Notes:
Magnetic behavior: The alloy is non-magnetic in the annealed condition but may become weakly magnetic after severe cold working.
Weldability: Standard austenitic stainless steel welding processes (GTAW, GMAW, SMAW) can be applied. Low-carbon fillers such as ER308L are typically used to minimize sensitization. Post-weld annealing restores full corrosion resistance and removes magnetism.
Surface finish: 202 plate/coil is available in a variety of finishes including 2B, BA, No.4, HL, and mirror polished. Pre-treatment or passivation may be necessary for optimum service life.
Limitations: Not recommended for strong reducing acids, hot chloride solutions, or prolonged use above 800 °F (427 °C) where carbide precipitation could reduce corrosion resistance.
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