AISI 321 Stainless Steel Coil

AISI 321 Stainless Steel Coil is a titanium-stabilized austenitic alloy engineered for excellent resistance to intergranular corrosion, high-temperature oxidation, and thermal fatigue. The coil form, representing precision-rolled sheet, allows for continuous fabrication and seamless integration into large-scale manufacturing processes. It is extensively used in aerospace, chemical processing, power generation, and marine industries, where thermal stability and corrosion resistance are critical. Specific applications include heat exchanger panels in petrochemical plants, thermal shields in aerospace propulsion systems, and corrosion-resistant cladding for high-temperature ducting. In research, 321 stainless coils are key in studies on dynamic recrystallization, high-temperature creep, and microstructural stability under cyclic thermal loading. Their combination of structural integrity, weldability, and resistance to sensitization ensures a vital role in both advanced engineering projects and industrial production environments requiring sustained performance at elevated temperatures.

Quick Links:

Tolerance

Properties

Reference & Citations

each

Tolerances

Coil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

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