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Grade: AISI 321
Formula: Fe/Cr 18/Ni 9/Ti
Form: Rod
Material: Stainless Steel
Commodity: Alloys

AISI 321 Stainless Steel Rod

AISI 321 Stainless Steel Rod is a titanium-stabilized austenitic alloy developed for superior resistance to intergranular corrosion, creep deformation, and scaling at elevated temperatures. The rod form offers high structural rigidity, uniform mechanical properties, and machinability for precision-engineered components. It is widely applied in aerospace, chemical processing, automotive exhaust systems, and nuclear power sectors, where stability under thermal cycling and corrosive attack is critical. Specific uses include high-temperature shafts, heat exchanger tube supports, and precision fasteners in corrosive environments. In research, AISI 321 rods are used to study phase stability under prolonged heat exposure, optimize machining parameters for enhanced fatigue life, and develop advanced coatings for extreme service conditions. Its combination of high-temperature strength, corrosion resistance, and reliable fabricability ensures it remains a preferred choice in demanding industrial and experimental applications.
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Tolerances

Rod
Diameter =<10mm ±10%
Diameter >10mm ±5%

Material Properties for Alloys

Mechanical Properties
Element Value
Hardness - Brinell 160-190
Elongation at break( % ) <60
Modulus of elasticity( GPa ) 190-210
Izod impact strength( J m⁻¹ ) 20-136
Tensile strength( MPa ) 560
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 70-73
Temperature coefficient( K⁻¹ ) -
Thermal Properties
Element Value
Maximum use temperature in air( C ) 800
Melting point( C ) 1400-1425
Thermal conductivity( W m⁻¹ K⁻¹ ) 16.3@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 18@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 7.9

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