AISI 321 Stainless Steel Disk

AISI 321 Stainless Steel Disk is a titanium-stabilized austenitic alloy designed for exceptional resistance to intergranular corrosion, high-temperature oxidation, and mechanical degradation under thermal cycling. In disk form, it offers precision, rigidity, and a stable surface for demanding mechanical, thermal, and corrosive environments. Its primary applications span aerospace, nuclear power, chemical processing, and automotive sectors, where high-temperature strength and structural reliability are critical. Specific uses include turbine sealing components, chemical reactor baffles, and thermal shielding elements in propulsion systems. Research applications focus on optimizing machining parameters for improved surface integrity, studying creep and fatigue resistance, and developing enhanced coatings for aggressive high-temperature service. The combination of thermal stability, corrosion resistance, and machinability ensures AISI 321 disks remain indispensable in industries that demand both high performance and material longevity.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

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

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