434 Stainless Steel Alloy

UNS: S43400
EN DIN: 1.4113

434 Stainless Steel Strip, Coil & Sheet

  • ASTM A240

Our wide capabilities give us a unique ability to supply all of your 434 stainless steel strip, coil, and sheet needs.

precision slitting

434 Stainless Steel Alloy Description:

Type 434 is a modification of Type 430, and one of the most widely used “non-hardenable” ferritic stainless steels. The addition of molybdenum increases this alloy’s corrosion resistance and its attack from many de-icing chemicals. It also provides good heat and oxidation resistance up to 1500 °F as well as good mechanical properties. Heating above the critical austenite forming temperature leads to a room temperature microstructure of ferrite and fine martensite. As-annealed the alloy is ferritic. Maximum service temperature is 1500 °F.


434 Stainless Steel Alloy Uses & Applications:

Applications include:

Industries supplied include:

Nominal Composition


Physical Properties

At 70°FAt 20°C
Density0.28 lb./in³7.74 g/cm³
Modulus of Elasticity (E)28.0 x 10³ ksi193 GPa
Coefficient of Expansion5.8 µin/in-°F (32-212°F)10.4 μm/m-°C (0-100°C)
Electrical Resistivity23.68 μ ohm.in60 μ ohm.cm
Thermal Conductivity15.1 Btu-in./ft.²hr.-°F26.1 W/m-K
Typical Room Temperature Mechanical Properties

Typical Mechanical Properties

ConditionTensile Strength Min (UTS)0.2% YS MinElongation% in 2” Min (50.8 mm)Hardness Rockwell
Annealed80 ksi (655 MPa)50 ksi (290 MPa)28%75 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.

Benefits of Working with Combined Metals


Coil Calculator

Choose a calculator to find coil weights, coil OD’s, coil footage, and PIW.

The Combined Metals Family of Companies

Explore Our Companies
get in touch

Questions? Contact Our Experts Today.

The Combined Metals Company mission is to safely produce and distribute the best value and the highest quality engineered stainless steel coil and sheet, specialty alloy strip, foil, and wire products and to deliver those products to customers around the world. Give us a call at (800) 323-0758 or fill out the form.

*denotes a required field.