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PRODUCT DATA of AM 355
MaterialAM 355
Product DatasheetPyromet 355
General InformationAM-355 is a companion alloy to AM-350 differing from it by a slightly lower Cr content and a higher amount of carbon. AM-355 has high strength up to 425C and good oxidation resistance up to 535C. The AM-355 alloy is generally hardened by subzero cooling and tempering (Condition SCT). Due to the higher Carbon content then AM- 300, AM-355 usually has little or none delta ferrite. Data for SCT1000 condition
PrecautionsAll other conditions below SCT1000 have low resistance to SCC
Chemical CompositionFe-15.5Cr-3Mo-4.5Ni-0.15C
ELASTIC PROPERTIES
Tensile Modulus197 GPa
Remark: ASM handbook
Shear Modulus79.3 GPa
THERMAL PROPERTIES
Thermal Conductivity14.7 W/m.K
Thermal Expansion Coefficient11.7 μstrain/°C
Melting Range1370 to 1400 °C
Specific Heat0.5 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Stress Corrosion StatusHigh Resistance to SCC: Table 1
High resistance to SCC in SCT1000 condition
Remark: acc. to ECSS-Q-ST-70-36C
Data Quality: Design Data
EMF vs SCE-0.07 V
Remark: Measured in 3.5% NaCl solution
Data Quality: Design Data
WeldingThis alloy can be successfully welded using all common methods with the notable exception of Oxyacetylene. While preheating the weld piece is not required, it is recommended that the material be annealed after welding to retain maximum properties. For best strength at elevated temperature a filler metal should be chosen that is of similar chemistry.