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	PRODUCT DATA of AISI 409

Material	AISI 409
General Information	Ferritic stainless steel
Chemical Composition	10.5-11.75Cr, 0.08C, 1Mn, 0.5Ni, 6xC Ti, rem Fe

	EXPERIENCE IN PRACTICE

Equivalent Designations

UNS S40900, 1.4720, 1.4612

	PHYSICAL PROPERTIES

Crystal Structure	Face centered cubic (fcc)
Magnetic Properties	Ferromagnetic

	THERMAL PROPERTIES

Thermal Conductivity	24.9 W/m.K
Thermal Expansion Coefficient	11.7 μstrain/°C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status	No specific corrosion protection required
Stress Corrosion Status	High Resistance to SCC: Table 1 Remark: Tempering between 371oC and 593oC 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