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Stainless Steel
Stainless Steel 201
Annealing Procedure
Anneal at 1850-200 F(1010-1093 C). To avoid scaling, do not exceed 2000 F. Rapid cooling is recommended to avoid the crystallization of carbides.
Applications
Applications include structural members, siding and roofing for railway cars and trailers and a variety of severely formed parts.
Formability
This alloy can be satisfactorily formed using all of the commonly employed forming methods using techniques and pressures similar to those employed in other 300 series stainless steels.
Hot Workability
Hot work in the range of 2100-2250 F (1149-1232 C).
Principle Design Features
201 combines good mechanicals, corrosion resistance, formability and fabricability. It is similar in many respects to 301 stainless steel. 201 has been successfully used in a variety of low temperature environments, down to -425 F.
Weldability
All conventional welding methods are applicable here. Filler metal of similar composition, or of standard 18-8 stainless steels may be used. 201 is sensitive to intergranular attack along weld boundaries. If heavy welding is required, many producing mills can provide a low carbon version of the alloy.
Known Forms
Bar-Hollow
Blanks
Flat Bar
Foil
Hexagon Bar
Pipe-Seamless
Pipe-Welded
Plate
Plate-Clad
Round Bar
Seamless Rolled Rings
Sheet
Square Bar
Strip
Tube-Rectangular
Tube-Round (Seamless)
Tube-Round (Welded)
Tube-Square
Wire Rod
Wire-Flat
Wire-Round
Wire-Shaped
Billet
Coil
Ingot
Tube-Hexagonal
Tube-Octagonal
Additional Data
Specifications
201,A213,A240,A249,A276,A412,A666,S766,S20100Dismiss
Chemical Elements
| Carbon | 0.15 max |
| Chromium | 16 - 18 |
| Iron | Balance |
| Manganese | 5.5 - 7.5 |
| Nickel | 3.5 - 5.5 |
| Nitrogen | 0.25 max |
| Phosphorus | 0.06 max |
| Silicon | 1 max |
| Sulphur | 0.03 max |
Physical Properties
Density: 0.287lb/in³
Specific Gravity: 7.94
Specific Heat: 0.12BTU/lb·°F
Thermal Conductivity
| Condition | Temperature | Conductivity |
|---|---|---|
| Annealed | 212 °F | 9.4 W/m·K |
Thermal Expansion
| Condition | Min | Max | Expansion Coefficient |
|---|---|---|---|
| Annealed | 70 °F | 600 °F | 10 µin/in/°F |
| Annealed | 70 °F | 1000 °F | 10.9 µin/in/°F |
| Annealed | 70 °F | 1600 °F | 11.3 µin/in/°F |
Rupture Test Data
| Condition | Form | Temperature | Time | Rupture Strength |
|---|---|---|---|---|
| Annealed | Sheet | 1500 °F | 1000 Hours | 4 KSI |
| Annealed | Sheet | 1200 °F | 1000 Hours | 22.5 KSI |
Mechanical Test Data
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 200°F |
| Elongation | 61% |
| Tensile Strength | 98KSI |
| Yield Strength | 39KSI |
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 600°F |
| Elongation | 43% |
| Tensile Strength | 79KSI |
| Yield Strength | 27KSI |
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 1000°F |
| Elongation | 33% |
| Tensile Strength | 70KSI |
| Yield Strength | 23KSI |
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 1200°F |
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 1400°F |
| Elongation | 27% |
| Tensile Strength | 26KSI |
| Yield Strength | 20KSI |
| Form | Sheet |
| Condition | Annealed |
| Measurement Temperature | 1500°F |
| Form | Sheet |
| Condition | Extra Full Hard |
| Measurement Temperature | 70°F |
| Elongation | 4% |
| Rockwell Hardness | C45HRX |
| Tensile Strength | 229KSI |
| Yield Strength | 218KSI |
| Form | Sheet |
| Condition | Full Hard |
| Measurement Temperature | 70°F |
| Elongation | 12% |
| Rockwell Hardness | C42HRX |
| Tensile Strength | 192KSI |
| Yield Strength | 155KSI |
| Form | Sheet |
| Condition | Half Hard |
| Measurement Temperature | 70°F |
| Elongation | 19% |
| Rockwell Hardness | C32HRX |
| Tensile Strength | 164KSI |
| Yield Strength | 120KSI |
| Form | Sheet |
| Condition | Quarter Hard |
| Measurement Temperature | 70°F |
| Elongation | 34% |
| Rockwell Hardness | C27HRX |
| Tensile Strength | 138KSI |
| Yield Strength | 90KSI |
| Form | Sheet |
| Condition | Test Specimen Annealed |
| Measurement Temperature | 70°F |
| Elongation | 55% |
| Rockwell Hardness | B91HRX |
| Tensile Strength | 115KSI |
| Yield Strength | 50KSI |
| Form | Sheet |
| Condition | Three Quarter Hard |
| Measurement Temperature | 70°F |
| Elongation | 15% |
| Rockwell Hardness | C37HRX |
| Tensile Strength | 187KSI |
| Yield Strength | 145KSI |
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