Chemical Composition and Mechanical Properties of 429 (S42900) Stainless Steel

Chemical Composition:

Mechanical Properties:

Applications and Industries Using 429 Stainless Steel

The moderate corrosion resistance and good weldability of SUS429 make it suitable for various applications, such as:

1. Automotive Industry: Exhaust systems, mufflers, and catalytic converters.
2. Construction: Structural components in mildly corrosive environments.
3. Appliances: Components requiring moderate corrosion resistance and formability.
4. Industrial Equipment: Heat exchangers, furnace parts, and pressure vessels.
5. Food Processing: Equipment that requires easy cleaning and moderate corrosion resistance.

Manufacturing Process of 429 (S42900) Stainless Steel

The manufacturing process typically includes:

1. Melting: Raw materials are melted in an electric arc furnace or induction furnace.
2. Refining: The molten metal is refined using Argon Oxygen Decarburization (AOD).
3. Casting: The refined molten steel is cast into slabs or billets.
4. Hot Rolling: Slabs are hot-rolled into plates or sheets.
5. Cold Rolling: Further reduction at room temperature for precise dimensions.
6. Annealing: Heat treatment to improve ductility and remove residual stresses.

Comparison of 429 Stainless Steel with Other Ferritic Grades

SUS429 offers better weldability than SUS430 due to its lower chromium content, making it ideal for applications requiring forming and welding.

Corrosion Resistance and Heat Treatment of SUS429

Corrosion Resistance:

• Moderate resistance to oxidation and corrosion in mildly corrosive environments.
• Performs well in applications with exposure to atmospheric conditions.

Heat Treatment:

• Annealing: Heat to approximately 800-850°C, followed by air cooling.
• Does not respond to hardening heat treatments due to its ferritic structure.

Advantages of SUS429 Stainless Steel in Industrial Applications

1. Improved weldability compared to higher-chromium grades like SUS430.
2. Good formability for manufacturing complex shapes.
3. Cost-effective alternative to austenitic grades in less aggressive environments.
4. Moderate corrosion resistance suitable for automotive and structural applications.

At HL Steel Company, we supply high-quality SUS429 stainless steel products tailored to meet your industrial needs, ensuring excellent performance in automotive, construction, and appliance manufacturing sectors!