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	PRODUCT DATA of AISI 304

Material

AISI 304

Product Datasheet

AK steel 304_304L_Data_Sheet

General Information

General purpose austenitic grade for enhanced corrosion resistance

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

8 to 12% Ni, 18 to 20% Cr, 2% Mn max, 1% Si max, 0.15% C max, Rem. Fe

Name of Manufacturer

many suppliers

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Cost Range

Low

Lot Reproducibility

Good

Equivalent Designations

A2; A2-50; A2-70; A2-80

Space Experience

Good

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

7.95

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

193 to 200 GPa

	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: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data

EMF vs SCE

-0.1 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