201 stainless steel is part of the 200 series of austenitic stainless steels. Originally developed to conserve nickel, this family of stainless steels is characterized by low-nickel content.
201 stainless steel is not hardened by heat treatment and is annealed at 1850-1950°F (1010-1066°C), followed by water quenching or rapid air cooling.
201 stainless steel chemical composition:
| Grade | C % | Cr % | Ni % | Mn % | P % | S % | Si % | N % |
| 201 | ≤ 0.15 | 16-18 | 3.5-5.5 | 5.5-7.5 | ≤ 0.06 | ≤ 0.03 | ≤ 1.00 | ≤0.25 |
201 stainless steel mechanical properties:
| Grade | Yield strength | Tensile strength | Elongation δ5 | Hardness |
| σs MPa | σb MPa | % | HB | |
| 201 | ≥260 | ≥515 | ≥40 | ≤217 |
| Density (lb./ in^2) @ RT | 0.283 | |
| Modulus of Elasticity in Tension (psi x 10^6) | 28.6 | |
| Specific Heat (BTU/o F/lb.) | 32 to 212 oF | 0.12 |
| Thermal Conductivity (BTU/hr/ft^2/ft) | 212oF | 9.4 |
| Mean Coefficient of Thermal Expansion (in. x 10^-6 per o F) | 32 to 212oF | 8.7 |
| 32 to 600oF | 9.7 | |
| 32 to 1,000oF | 10.2 | |
| Electrical Resistivity (micro ohms - cm) | at 70oF | 69 |
| Melting Point Range (oF) | 2550/2650 | |
| Oxidation Resistance - Continuous Service(oF) | 1550 | |
| Oxidation Resistance - Intermittent Service(oF) | 1500 |
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