347 Stainless Steel Alloy

UNS: S34700
EN-DIN: 1.4550

347 Stainless Steel Strip, Coil & Sheet

  • AMS 5512
  • ASTM A269
  • ASTM A240
  • ASTM A479
  • AMS 5680

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347 Stainless Steel Alloy Description:

347 alloys are stabilized stainless steels which offer as their main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C).  347 alloys are stabilized by the addition of columbium.


347 Stainless Steel Alloy Uses & Applications:

Nominal Composition


Physical Properties

At 70°FAt 20°C
Density0.288 lb./in³7.96 g/cm³
Modulus of Elasticity (E)28.0 x 10³ ksi193 x 10³MPa
Coefficient of Expansion9.2 x 10⁻⁶ microinches/in.-°F (70-600°F)16.6 μm/m-°C (20-300°C)
Electrical Resistivity28.4 μ ohm.in72 μ ohm.cm
Thermal Conductivity9.5 Btu-in./ft.²hr.-°F16.3 W/m-K
Typical Room Temperature Mechanical Properties

Typical Mechanical Properties

Typical mechanical properties are based on ATI source, ASTM A240

ConditionTensile Strength Min (UTS)0.2% YS MinElongation% in 2” Min (50.8 mm)Hardness Rockwell
Annealed93 ksi (640 MPa)37 ksi (250 MPa)45%84 HRBW
Limitation of Liability and Disclaimer of Warranty:
  • The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only. It is not intended for engineering or design.
  • Applications may be discussed, however, Combined Metals Company, LLC, does not recommend or endorse any material for any particular end use or application.
  • The data included in this data sheet are typical values and may vary.
  • Combined Metals Company, LLC, makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Combined Metals Company, LLC, be liable for any damages whatsoever arising from the use of the information included in the data sheets.

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