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PRODUCT DATA of AISI 446
MaterialAISI 446
General InformationFerritic Stainless Steel. Used in furnace parts, glass molds, chemical processing equipment
Chemical Composition23-27Cr, 0.25N, 0.2C, rem Fe
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity7.6
Magnetic PropertiesFerromagnetic
ELECTRICAL PROPERTIES
Electrical Volume Resistivity6.7e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity20.9 W/m.K
Thermal Expansion Coefficient10.4 μstrain/°C
Melting Range1430 to 1510 °C
Specific Heat0.5 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Corrosion/ThermalHigh resistance to corrosion
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Remark: Tempering between 371C and 593C shall be avoided because corrosion and stress corrosion cracking resistance is lowered.
Data Quality: Design Data
Bimetallic CorrosionCan be connected without any restriction to: Cr, Au, Ag, Gun-metal, P-bronzes, Sn-bronzes, Ti+alloys, Ni, Monel, Inconel, Ni/Mo alloys
Can be connected in a non-controlled environment to the above and Cd, austenitic cast iron, Cu, Brasses, Al-bronzes, Si-bronzes, Au, Pt, C, Rh, Sn-Pb alloys, Sn, Pb, 300 series stainless steels
Can be connected in a clean room environment to above and Al-Cu alloys
Needs specific measures: All others
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data
MachinabilityFair
WeldingFair: care required because of high Cr content