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Stainless Steel 321H Pipes are composed of iron, chromium, nickel, and molybdenum. The addition of titanium stabilizes the material against sensitization during welding and improves the mechanical properties of the resulting alloy. This combination gives it excellent corrosion resistance in various environments and makes it ideal for applications with high temperatures, corrosive conditions, or stress.

321H SS Pipes can be used in various applications due to their excellent corrosion resistance, tensile strength, and formability. Applications include pressure vessels, piping systems, exhaust manifolds, turbochargers, and exhaust systems. Its high-temperature strength and creep resistance make it ideal for heat exchangers and other high-temperature components. This grade of stainless steel also offers excellent weldability, making it suitable for joining pipes in various configurations. Additionally, 321H Stainless Steel pipes provide superior resistance to stress-corrosion cracking and pitting corrosion, as well as general corrosion in many environments.

Chemical Composition of Stainless Steel 321H Pipes

Analyze the chemical composition of Stainless Steel 321H Pipes detailed in the comprehensive table below.


0.70 max


Stainless Steel 321H Pipes showcase controlled levels of carbon, manganese, silicon, phosphorus, sulfur, chromium, nitrogen, nickel, and titanium.

Mechanical Properties of Stainless Steel 321H Pipes

Examine the mechanical attributes of Stainless Steel 321H Pipes presented in the provided table below.

GradeTensile Strength (MPa) minYield Strength 0.2% Proof (MPa) minElongation (% in 50mm) minHardness
Rockwell B (HR B) maxBrinell (HB) max

Stainless Steel 321H Pipes feature high tensile and yield strengths, substantial elongation, and acceptable hardness.

Physical Properties of Stainless Steel 321H Pipes

Investigate the physical characteristics of Stainless Steel 321H Pipes outlined in the comprehensive table provided below.

GradeDensity (kg/m3)Elastic Modulus (GPa)Mean Coefficient of Thermal Expansion (m/m/0C)Thermal Conductivity (W/m.K)Specific Heat 0-1000C (J/kg.K)Electrical Resistivity (n.m)




at 1000C

at 5000C

SS 321H800019315.916.

Stainless Steel 321H Pipes feature specific density, thermal expansion, conductivity, heat capacity, and electrical resistivity.

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