Stainless Steel 314 1.4841

Stainless Steel 314 1.4841

Stainless Steel 314, also known as 1.4841, is a heat-resistant stainless steel alloy suitable for various applications in high-temperature environments. This comprehensive guide provides detailed information about the chemical composition, mechanical properties, and processing guidelines for Stainless Steel 314, offering valuable insights for engineers and fabricators.

Chemical Composition

Stainless Steel 314 exhibits the following chemical composition:

Element% Present (in product form)
Carbon (C)0.20
Silicon (Si)1.50 - 2.50
Manganese (Mn)2.00
Phosphorous (P)0.045
Sulfur (S)0.015
Chromium (Cr)24.00 - 26.00
Nickel (Ni)19.00 - 22.00
Nitrogen (N)0.11
Iron (Fe)Balance

Mechanical Properties

The mechanical properties of Stainless Steel 314 in the annealed condition are as follows:

PropertyProduct FormThickness (mm) or Diameter (mm)Value
Proof Strength (Rp0.2 N/mm²)C, H, P≤ 12230
 L≤ 25270
Tensile Strength (Rm N/mm²)--550 - 750
Hardness (HB Max)--223

Physical Properties

Stainless Steel 314 possesses the following physical properties:

  • Density at 20°C: 7.9 kg/m³
  • Thermal Conductivity:
    • At 20°C: 15 W/m K
    • At 500°C: 19 W/m K
  • Specific Thermal Capacity at 20°C: 500 J/kg K
  • Electrical Resistivity at 20°C: 0.9 Ω mm²/m
  • Coefficient of Linear Thermal Expansion (10^-6 K^-1):
    • Between 20°C and 200°C: 15.5
    • 400°C: 17.0
    • 600°C: 17.5
    • 800°C: 18.0
    • 1000°C: 19.0

Applications

Stainless Steel 314 finds applications in industries requiring components resistant to scaling up to approximately 1150°C. It is suitable for use in environments with oxidizing and carbonizing gases, although its resistance to reductive sulphurous gases is low.

Processing and Welding

Stainless Steel 314 can be processed and welded using standard methods such as TIG welding, MAG welding with solid wire, arc welding, and laser beam welding. Preheating is generally not required for this steel, and the interpass temperature should not exceed 150°C. Heat treatment after welding is typically unnecessary.

To prevent distortion during welding, techniques such as back-step sequence welding and welding alternately on opposite sides should be employed, especially for thicker sections. Copper back-up plates can be used to facilitate heat injection, but care must be taken to avoid surface-fusing the copper back-up plate to prevent cracks in the solder metal.

Additionally, Stainless Steel 314 has a higher coefficient of thermal expansion compared to non-alloyed steels, leading to greater distortion. Welding procedures should aim to minimize distortion, and a higher cooling speed is recommended to reduce the risk of intergranular corrosion and embrittlement.

Stainless Steel 314 (1.4841) offers excellent heat resistance and corrosion resistance, making it suitable for applications in high-temperature environments. With proper processing and welding techniques, Stainless Steel 314 can provide reliable performance in challenging conditions.


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