Stainless Steel 309 1.4828

Stainless Steel 309 1.4828

Steel Friend 309, also known as 1.4828, epitomizes resilience and versatility in the realm of stainless steel alloys. Renowned for its ability to withstand high temperatures and corrosive environments, Steel Friend 309 finds ubiquitous applications across various industries. Let's explore its chemical compositions, mechanical properties, and physical characteristics in detail, supplemented by the comprehensive data table provided.

Chemical Compositions

Steel Friend 309 boasts a meticulously crafted composition tailored to withstand formidable conditions:

  • Carbon (C): 0.20%
  • Silicon (Si): 1.50 - 2.50%
  • Manganese (Mn): 2.00%
  • Phosphorous (P): 0.045%
  • Sulfur (S): 0.030%
  • Chromium (Cr): 19.00 - 21.00%
  • Nickel (Ni): 11.00 - 13.00%
  • Nitrogen (N): 0.11%
  • Iron (Fe): Balance

These meticulously balanced compositions ensure robustness against oxidation, corrosion, and mechanical stress, making Steel Friend 309 indispensable for critical applications.

Mechanical Properties

Steel Friend 309's mechanical prowess is evident in its performance under varying conditions:

Product FormThickness or Diameter (mm)Hardness (HB max.)Proof Strength (N/mm²)Tensile Strength (N/mm²)Elongation (%)
C, H, P≤ 12216190500 - 72040 (Long Products)
L≤ 25-230min. 5500.5 ≤ a/d ˂ 3: 40
TW*= 25-270min. 5503 ≤ a/d: 40

These properties ensure structural integrity and reliability in demanding environments, solidifying Steel Friend 309's position as a preferred choice for critical applications.

Creep Properties

Steel Friend 309's creep resistance is paramount for applications subjected to prolonged exposure to elevated temperatures:

Temperature (°C)1,000 h Rupture (N/mm²)10,000 h Rupture (N/mm²)1,000 h Elongation (%)10,000 h Elongation (%)100,000 h Elongation (%)
6001208019012065
7005025753616
800201035187.5
90084158.53

These values underscore its ability to maintain structural integrity over extended periods, ensuring operational reliability in high-temperature environments.

Physical Properties

Steel Friend 309 boasts impressive physical properties essential for diverse applications:

  • Density at 20°C: 7.9 kg/m³
  • Thermal Conductivity (W/m K):
    • 20°C: 15
    • 500°C: 21
  • Specific Thermal Capacity (J/kg K): 500 (20°C)
  • Electrical Resistivity (Ω mm²/m): 0.85 (20°C)
  • Coefficient of Linear Thermal Expansion (10^-6 K^-1):
    • 20°C to 200°C: 16.5
    • 400°C: 17.5
    • 600°C: 18.0
    • 800°C: 18.5
    • 1000°C: 19.5

These properties facilitate efficient heat transfer, structural stability, and electrical conductivity, augmenting Steel Friend 309's suitability for diverse engineering applications.

Application Scenarios

Steel Friend 309 finds extensive utilization across various industries, owing to its exceptional properties:

  1. High-Temperature Environments: Its resistance to scaling up to 1000°C makes it indispensable for components in furnaces, boilers, and exhaust systems.

  2. Chemical Processing: The alloy's corrosion resistance makes it ideal for equipment exposed to sulphurous gases, such as in petrochemical plants and refineries.

  3. Aerospace and Automotive: Steel Friend 309's mechanical strength and thermal stability render it suitable for aerospace components, exhaust systems, and automotive engine parts.

  4. Construction and Architecture: Its aesthetic appeal, coupled with its durability and corrosion resistance, makes it a preferred choice for architectural elements, such as facades and structural supports in corrosive environments.

  5. Energy Sector: In power generation facilities, Steel Friend 309 finds applications in high-temperature components like turbine blades, exhaust systems, and heat exchangers.

In essence, Steel Friend 309 epitomizes resilience and versatility, offering unparalleled performance across a spectrum of demanding applications.

In conclusion, Steel Friend 309 stands as a testament to the ingenuity of materials engineering, combining a meticulously crafted composition with exceptional mechanical and physical properties. Its resilience to high temperatures, corrosion, and mechanical stress renders it indispensable across various industries, from aerospace to energy production. As industries continue to push the boundaries of performance and reliability, Steel Friend 309 remains a steadfast companion, enabling innovation and progress in engineering endeavors.


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