Stainless Steel 430F Properties

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Stainless Steel 430F

Stainless Steel 430F, recognized by its UNS S43020 designation, is a ferritic stainless steel renowned for its excellent machinability and moderate corrosion resistance. This alloy is specifically designed to offer improved machinability, making it an ideal choice for precision machining applications. The addition of sulfur in its composition enhances its machinability without significantly compromising its corrosion resistance, making it suitable for a variety of industrial applications.

Ferrobend’s Stainless Steel 430F is meticulously manufactured to meet stringent quality standards, ensuring consistent performance and reliability. This material is characterized by its high strength, good corrosion resistance in mildly corrosive environments, and excellent machinability. These properties make it ideal for use in fasteners, gears, shafts, and other components that require precise machining and high durability.

The material's ferritic structure provides good resistance to stress corrosion cracking and oxidation, making it suitable for applications in automotive parts, kitchen appliances, and other industrial components. The alloy’s ability to maintain its mechanical properties at elevated temperatures further enhances its versatility and applicability in various engineering tasks.

Choosing Ferrobend’s Stainless Steel 430F guarantees a robust and reliable solution for your industrial needs. Our commitment to quality and customer satisfaction ensures that you receive materials that perform exceptionally well, reducing maintenance costs and downtime. With Ferrobend, you can trust that our stainless steel products will deliver long-lasting performance and reliability in the most challenging environments.

Chemical Properties:

Elements Cr Ni C Si Mn P S Mo Fe
% min: 17.0 ,max:19.0 min: 8.0 ,max: 10.0 0.15 max 1.00 max 2.0 max 0.20 max 0.15 min 0.75 balance

Mechanical Properties:

Tensile Strength ksi (min.) Yield Strength 0.2% Offset ksi (min.) Elongation - % in 50 mm (min.) Hardness (Brinell) MAX Hardness (Rockwell B) MAX
75 30 35 228 -

Physical Properties:

Denstiy lbm/in3 Coefficient of Thermal Expansion (min/in)-°F Electrical Resistivity mW-in Thermal Conductivity BTU/hr-ft-°F Melting Range
at 68 °F at 68 – 212°F at 68 – 932°F at 68 – 1450°F at 68°F at 212°F at 392°F at 752°F at 1112°F at 1472°F at 68 – 212°F -
0.29 9.2 10.4 10.9 28.3 30.7 33.8 39.4 43.7 47.6 113.2 2552°F

Equivalent Grades and Designations:

SAE / AISI 303
UNS S30300
EN Material Number 1.4305
EN Material Name X8CrNiS18-9
DIN Material Name X8CrNiS18-9
JIS SUS 303
BS 202S 21 En58M

Heat Resistance:

  • Good oxidation resistance at temperatures up to 1700oF (927 oC)
  • Continuous use at temperatures above 1400oF (760oC) is not usually recommended due to carbide precipitation which can lead to irregular scaling
  • Does not have a low carbon content so it is also vulnerable to sensitization

Welding Characteristics:

  • Not generally recommended, but may be welded with some difficulty
  • May be welded with Alloy 310 electrodes
  • Should be annealed after welding to re-dissolve precipitated carbides

Machinability:

  • High machining rates can be obtained in the annealed condition with hardness in the range of 200 to 240 Brinell
  • Will work harden; therefore, it should be machined at reduced surface feet per minute and heavier feeds to prevent glazing at the tool interface.

Applications:

  • Nuts and bolts
  • Aircraft fittings
  • Gears
  • Screws
  • Shafts
  • Electrical switchgear components
  • Bushings