200 Stainless Steel is a commonly used engineering material. This page provides a complete data sheet including composition, mechanical properties, thermal properties, and typical applications. Use this information for material selection, engineering design, and comparison with similar grades.
200 Series stainless steels are not new – In fact they have been around for many years. To date they have traditionally not proved very popular outside the USA. However, since they have a much lower Nickel content than 300 Series Austentics, the very high Nickel price over recent years has led to significantly more interest. Equally, stainless steel producers have an ongoing programme of development designed to enhance existing grades and produce new grades. These new grades are sometimes developed for specific end uses and sometimes to improve upon an existing grade. Features:
- Lower nickel than 300 series – with it being replaced by Manganese
- Thus lower cost than 300 series
- Similar mechanical & physical properties to 300 series
- Similar fabrication performance to 300 series, including deep-drawing
- Corrosion resistance similar to 430 (i.e. not nearly as good as 300 series)
- High carbon may cause stress corrosion cracking, especially after welding thicker material
- Non Magnetic Performance Comparison:
- Formability: Similar to 304, better than 430
- Strength: Stronger than 304 (and 430)
- Corrosion Resistance @20 C: Similar to 304, better than 430 but susceptible to stress corrosion cracking / intergranular corrosion especially after welding
The 200 series grades perform at a similar level to grades 304 and 301 in low corrosion, mainly indoor applcations at room temperature. Not recommended for use in Chloride environments.
Oxidation resistance is similar to grade 1.4310 (301) up to 840 Centigrade. Where high strength is required at temperatures above 500°C and up to 800°C, grade 304H is recommended. This material will retain aqueous corrosion resistance. Where high strength is required at temperatures above 500°C, grade 316H is recommended. Where high strength is required at temperatures above 500°C, grade 316H is recommended.
Reasonable, although sensitive to intergranular corrosion in the heat affected zone where thickness exceeds 6mm. Post-weld cleaning and passivation is crucial. 304H is not a good choice for welding Fusion welding performance for type 304 stainless steel is excellent both with and without fillers. Recommended filler rods and electrodes for stainless steel 304 is grade 308 stainless steel. For 304L the recommended filler is 308L. Heavy welded sections may require post-weld annealing. This step is not required for 304L. Grade 321 may be used if post-weld heat treatment is not possible. 304H is not a good choice for welding.
AISI 201 stainless steel corresponds to the following specifications: UNS20100 / EN1.4372 / JIS SUS 201
AISI 201L stainless steel corresponds to the following specifications: UNS20103 / EN1.4371
AISI 202 stainless steel corresponds to the following specifications: UNS20200 / EN1.4373
AISI 204C stainless steel corresponds to the following specifications: UNS20400 / EN1.4597
Chromium (Cr) 16.00 - 18.00
Manganese (Mn) 6.80 - 8.50
Nickel (Ni) 2.00 - 5.00
Nitrogen (N) 0.0 - 0.25
Iron (Fe) Balance
| Metric | Imperial | |
|---|---|---|
| Dielectric Strength | ∞V/m | ∞V/ft |
| Electric Resistivity (@ 20 °C) | 75 µΩcm | 29.48 µΩin |
| Magnetic Permeability | 1.02 | 1.02 |
| Metric | Imperial | |
|---|---|---|
| Ductility | 60 % | 60 % |
| Friction Coefficient (static) | 0.06-0.15 | 0.06-0.15 |
| Hardness, Rockwell B | 85 | 85 |
| Poissons Ratio | 0.3 | 0.3 |
| Proof Stress | 200 Mpa | 29007.54 psi |
| Mass Density | 7900 Kg/m3 | 493.18 lb/ft3 |
| Shear Modulus | 78 Gpa | 11312.94 ksi |
| Tensile Strength | 655 MPa | 94999.69 psi |
| Yield Strength | 200 MPa | 29007.54 psi |
| Youngs Modulus | 200 GPa | 29007.54 ksi |
| Metric | Imperial | |
|---|---|---|
| Coefficient of Thermal Expansion (Linear @ 0-100°C) | 17 x 10-6 °C-1 | 9.45 x 10-6 °F-1 |
| Melting Point | 1400 °C | 2552.00-32.00 °F |
| Service Temperature in Air Intermittent | 760 °C | 1400.00 °F |
| Service Temperature in Air Continous | 870 °C | 1598.00 °F |
| Specific Heat Capacity | 0.5 J/g-°C | 207.80 BTU/lb-°F |
| Thermal Conductivity | 15 W/mK | 8.67 BTU/hr ft |