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PRODUCT DATA of AISI 302
MaterialAISI 302
General InformationHigher carbon modification of Type 304 for higher strength on cold rolling. Type 302 is strengthened by cold working. If cold-worked Type 302 is subjected to temperatures above 480C, its room-temperature strength is reduced.
PrecautionsType 302 should not be used for extended periods at temperatures of 400 to 900C and should not be cooled slowly from higher temperatures through this range.
Effects of Space environmentThe natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials.
Chemical Composition17-19Cr, 8-10Ni, <2Mn, <0.15C, rem Fe
Name of Manufacturermany suppliers
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeLow
Lot ReproducibilityGood
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity7.86
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus193 GPa
Poisson Ratio0.25
ELECTRICAL PROPERTIES
Electrical Volume Resistivity7.15e-7 ohm.m
THERMAL PROPERTIES
Thermal Conductivity12.3 W/m.K
Melting Range1400 to 1420 °C
Specific Heat0.5 J/g.K
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Stress Corrosion StatusHigh Resistance to SCC: Table 1
Data Quality: Design Data
EMF vs SCE-0.09 V
Remark: Measured in 3.5% NaCl solution
Data Quality: Design Data
Bimetallic CorrosionCan be connected without any restriction to: Cr, Au, Pt, C, Rh, Ag, Gun-metal, P-bronzes, Sn-bronzes, Ti+alloys
Can be connected in a non-controlled environment to the above and Cd, Cu, Brasses, Ni, monel, inconel, N-Mo alloys, 400 series stainless steel
Can be connected in a clean room environment to above and Al-Cu alloys, Cu-Ni alloys, Al-bronzes, Si-bronzes
Needs specific measures: All others
Test:ECSS-Q-ST-70C Rev.1 Table 5.1
Data Quality: Design Data
FLUID SYSTEMS COMPATIBILITY
Gaseous Oxygen (GOX)Meets the mechanical impact requirements. No batch test required.
Liquid Oxygen (LOX)Meets the mechanical impact requirements. No batch test required.
Nitrogen Tetroxide (N2O4)SCC susceptibility is low and no fluid decomposition
Hydrazine (HDZE)SCC susceptibility is low and no fluid decomposition
SPECIAL RECOMMENDATIONS
Special RecommendationsType 302 should not be used for extended periods at temperatures of 400 to 900C and should not be cooled slowly from higher temperatures through this range. Prolonged exposure of the nonstabilized grades to temperatures between 400 and 900C makes them susceptible to intergranular corrosion. This alloy is non-magnetic in the annealed condition but becomes magnetic on cold work.