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AISI 347 Stainless Steel Disk

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Properties common to all products in this list

Grade: AISI 347 Composition: Fe/Cr 18/Ni10/Nb Form: Disk Material: Stainless Steel UNS Number: S34700 Commodity: Alloys Temper: Annealed Thickness: 0.1mm
AISI 347 Stainless Steel Disk is a niobium-stabilized austenitic stainless steel disk valued for its excellent high-temperature corrosion resistance, good mechanical strength, and stability against intergranular carbide precipitation. The niobium content enhances creep resistance and performance in cyclic thermal environments, making it ideal for demanding service conditions. In disk form, it is widely used in aerospace turbine components, chemical processing systems, and nuclear power plant equipment. Specific applications include high-temperature flange seals, rotating machinery components, and structural interfaces in corrosive high-heat environments. In research, AISI 347 is extensively investigated for wear resistance improvements via nitriding, surface hardening with electron beam melting, and its oxidation/hot corrosion performance under severe service. Its combination of metallurgical stability, oxidation resistance, and mechanical reliability makes it a critical material for advanced scientific and industrial high-performance systems.
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Material Properties

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 ) 520-1100
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 70-73
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@100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 16-18@20-100°C
Physical Properties
Element Value
Density( gcm⁻³ ) 7.93
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Available Configurations

Properties common to all products in this list

Grade: AISI 347 Composition: Fe/Cr 18/Ni10/Nb Form: Disc Material: Stainless Steel UNS Number: S34700 Commodity: Alloys Temper: Annealed Thickness: 0.1mm

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Tolerances

Disc
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Diameter ±0.5mm