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	PRODUCT DATA of AISI 302

Material

AISI 302

General Information

Higher 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.

Precautions

Type 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 environment

The natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials.

Chemical Composition

17-19Cr, 8-10Ni, <2Mn, <0.15C, rem Fe

Name of Manufacturer

many suppliers

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Cost Range

Low

Lot Reproducibility

Good

Space Experience

Good

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

7.86

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

193 GPa

Poisson Ratio

0.25

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

7.15e-7 ohm.m

	THERMAL PROPERTIES

Thermal Conductivity

12.3 W/m.K

Specific Heat

0.5 J/g.K

Melting Range

1400 to 1420 °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 Data Quality: Design Data

EMF vs SCE

-0.09 V Remark: Measured in 3.5% NaCl solution Data Quality: Design Data

Bimetallic Corrosion

Can 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 Recommendations

Type 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.