AISI 201 / UNS S20100 (Austenitic) Stainless Steel
Chemistry, mechanical properties, physical properties, and practical selection notes for rolled AISI 201 products.
Performance & Use Notes
- Nickel-saving austenitic stainless (uses Mn + N to partially replace Ni).
- Often selected for cost stability vs nickel volatility while retaining good formability and corrosion resistance for many indoor/atmospheric applications.
Standards & Designations
ASTM A240 ♦ UNS S20100
Data Tables
- Low-nickel Cr-Mn austenitic stainless; often used as a cost-driven alternative to 301/304 in certain cold-worked/tempered applications.
- Not heat treatable for hardness; strength increases via cold work.
| Chemical composition (wt%) | Limits / typical |
|---|---|
| C | 0.15 max |
| Mn | 5.50–7.50 |
| Si | 0.75 max |
| P | 0.060 max |
| S | 0.030 max |
| Cr | 18.00–20.00 |
| Ni | 3.50–5.50 |
| N | 0.25 max |
| Fe | Balance |
| Mechanical (room temp) | Annealed (min) | Tempered (examples, min) |
|---|---|---|
| UTS | 95 ksi | 1/2 hard: 150 ksi; full hard: 185 ksi |
| YS (0.2% offset) | 38 ksi | 1/2 hard: 110 ksi; full hard: 140 ksi |
| Elongation | 40% min | 1/2 hard: 15–18%; full hard: 8–9% (gauge dependent) |
| Hardness | B95 max | — |
| Physical | Typical |
|---|---|
| Density | 0.283 lb/in³ (7.81 g/cm³) |
| Electrical resistivity | 27.0 microhm-in (68.5 microhm-cm) |
| Specific heat | 0.12 BTU/lb-°F (0–100°C) |
| Thermal conductivity | 9.4 BTU/hr·ft·°F @100°C; 12.4 @500°C |
Values shown are typical/spec limits at room temperature unless noted; requirements vary by product form, size, and specification.
201 stainless steel from Source21 is a cost effective austenitic stainless steel grade designed for strength visual consistency and manufacturing flexibility across decorative and light structural applications. Delivering the clean stainless appearance customers expect Type 201 stainless steel offers strong mechanical performance with lower nickel content making it an excellent alternative to 304 stainless steel for cost sensitive projects. It performs exceptionally well in cold working processes such as roll forming stamping and fabrication and is widely used in appliance trim kitchen sinks food service equipment interior architectural features furniture components and light automotive trim.
Source21 supplies 201 stainless steel in coil, strip, sheet, foil, and bar, all produced to meet ASTM A240, ASTM A666, and EN 1.4372 standards. Ready to source material for your next project or need help selecting the right form and finish
Contact the Source21 team today to place an order ask questions or get expert guidance backed by responsive service reliable supply and a commitment to quality.