Stainless 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

Angle

Angle

Channel

Channel

Coil

Coil

Disc

Disc

Flat Bar

Flat Bar

Foil

Foil

Hexagon Bar

Hexagon Bar

Hollow Bar

Hollow Bar

Pipe

Pipe

Plate

Plate

Precision Ground Bar

Precision Ground Bar

Rectangle Tube

Rectangle Tube

Ring

Ring

Rod

Rod

Round Bar

Round Bar

Round Tube

Round Tube

Sheet

Sheet

Square Bar

Square Bar

Square Tube

Square Tube

Standard Beam

Standard Beam

Strip

Strip

Tee

Tee

Additional Data

Specifications

201,A213,A240,A249,A276,A412,A666,S766,S20100

Chemical Elements

Carbon0.15 max
Chromium16 - 18
IronBalance
Manganese5.5 - 7.5
Nickel3.5 - 5.5
Nitrogen0.25 max
Phosphorus0.06 max
Silicon1 max
Sulphur0.03 max

Physical Properties

Density: 0.287lb/in³Density

Specific Gravity: 7.94Specific Gravity

Specific Heat: 0.12BTU/lb·°FSpecific Heat

Thermal Conductivity

ConditionTemperatureConductivity
Annealed212 °F9.4 BTU/hr·ft·°F

Thermal Expansion

ConditionMinMaxExpansion Coefficient
Annealed70 °F600 °F10 μin/in·°F
Annealed70 °F1000 °F10.9 μin/in·°F
Annealed70 °F1600 °F11.3 μin/in·°F

Rupture Test Data

ConditionFormTemperatureTimeRupture Strength
AnnealedSheet1500 °F1000 hrs4 KSI
AnnealedSheet1200 °F1000 hrs22.5 KSI

Mechanical Test Data

FormSheet
ConditionAnnealed
Temperature200°F
Elongation61%
Tensile Strength98 KSI
Yield Strength39 KSI
FormSheet
ConditionAnnealed
Temperature600°F
Elongation43%
Tensile Strength79 KSI
Yield Strength27 KSI
FormSheet
ConditionAnnealed
Temperature1000°F
Elongation33%
Tensile Strength70 KSI
Yield Strength23 KSI
FormSheet
ConditionAnnealed
Temperature1200°F
FormSheet
ConditionAnnealed
Temperature1400°F
Elongation27%
Tensile Strength26 KSI
Yield Strength20 KSI
FormSheet
ConditionAnnealed
Temperature1500°F
FormSheet
ConditionExtra Full Hard
Temperature70°F
Elongation4%
Rockwell HardnessC45
Tensile Strength229 KSI
Yield Strength218 KSI
FormSheet
ConditionFull Hard
Temperature70°F
Elongation12%
Rockwell HardnessC42
Tensile Strength192 KSI
Yield Strength155 KSI
FormSheet
ConditionHalf Hard
Temperature70°F
Elongation19%
Rockwell HardnessC32
Tensile Strength164 KSI
Yield Strength120 KSI
FormSheet
ConditionQuarter Hard
Temperature70°F
Elongation34%
Rockwell HardnessC27
Tensile Strength138 KSI
Yield Strength90 KSI
FormSheet
ConditionThree Quarter Hard
Temperature70°F
Elongation15%
Rockwell HardnessC37
Tensile Strength187 KSI
Yield Strength145 KSI