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PRODUCT DATA of 17-7PH CH900
Material17-7PH CH900
Product DatasheetAK Steel
METALCOR
HPM
General InformationA precipitation hardenable chromium-nickel-aluminum stainless steel combining high strength, moderate corrosion resistance and properties well suited for flat springs.
Chemical Composition16-18Cr, 6-7.75Ni, 0.75-1.5Al, rem Fe
EXPERIENCE IN PRACTICE
Equivalent DesignationsS17700, Custom 631, AISI 631, 1.4568
PHYSICAL PROPERTIES
Specific Gravity7.67
ELASTIC PROPERTIES
Tensile Modulus200 GPa
ELECTRICAL PROPERTIES
Electrical Volume Resistivity8.3e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity16.9 W/m.K
Thermal Expansion Coefficient10.3 μstrain/°C
Specific Heat0.461 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Data Quality: Design Data
MachinabilitySimilar to austenitic stainless steel
WeldingMost common arc and resistance methods have been successfully employed with 17-7 PH. It is recommended that inert gas shielding be employed during fusion welding to reduce the oxidation of aluminum during the process.