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	PRODUCT DATA of AISI 446

Material

AISI 446

General Information

Ferritic Stainless Steel. Used in furnace parts, glass molds, chemical processing equipment

Chemical Composition

23-27Cr, 0.25N, 0.2C, rem Fe

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

7.6

Magnetic Properties

Ferromagnetic

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

6.7e-7 ohm.m

	THERMAL PROPERTIES

Thermal Conductivity

20.9 W/m.K

Thermal Expansion Coefficient

10.4 μstrain/°C

Specific Heat

0.5 J/g.K

Melting Range

1430 to 1510 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

No specific corrosion protection required

Corrosion/Thermal

High resistance to corrosion

Stress Corrosion Status

High 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 Corrosion

Can 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

Machinability

Fair

Welding

Fair: care required because of high Cr content