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	PRODUCT DATA of AISI 301

Material

AISI 301

Product Datasheet

301_Data_Sheet

General Information

High work-hardening rate; applications requiring high strength and ductility. Type 301 is strengthened by cold working. If cold-worked Type 301 is subjected to temperatures above 480C, its room-temperature strength is reduced.

Precautions

Type 301 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. Zinc and lead particles must be removed before heating to avoid embrittlement.

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

16-18Cr, 6-8Ni, <2Mn, <1Si, <0.15V, rem Fe

Name of Manufacturer

Many European suppliers.

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

Cost Range

Low

Lot Reproducibility

Good

Equivalent Designations

1.4310, X12CrNi77, 301S21, Z12CN17-08, X12CrNi17-07, BS 801 Grade A; AISI301

Space Experience

Good

	PHYSICAL PROPERTIES

Crystal Structure

Face centered cubic (fcc)

Specific Gravity

7.91

Phase changes

Heating or cold work may result in some transformation of austenite to ferrite (martensite) simultaneously with the precipitation of carbides

Magnetic Properties

Nonmagnetic

	ELASTIC PROPERTIES

Tensile Modulus

193 GPa

Shear Modulus

78 GPa

Poisson Ratio

0.27

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

7.15e-7 ohm.m

	THERMAL PROPERTIES

Thermal Conductivity

16.2 W/m.K

Thermal Expansion Coefficient

16.6 μstrain/°C

Specific Heat

0.456 J/g.K Remark: annealed specimens

Melting Range

1400 to 1410 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

No specific corrosion protection required

Corrosion/Thermal

Intergranular attack in corrosive media is pronounced if this steel is sensitized by slow cooling through or by exposure at temperatures between 400 and 900 C. Annealing will eliminate this sensitized condition.

Atmospheric Corrosion

General corrosion resistance like that of all austenitic stainless steels.

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

Welding

This steel can be readily welded by all techniques, but the weld and heat affected zone becomes susceptible to intergranular corrosion, unless annealed after welding.

	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