All data is for information only------(Home)
PRODUCT DATA of AISI 304L
MaterialAISI 304L
Product DatasheetAK steel 304_304L_Data_Sheet
Aubert Duval 304L_X18BC
General InformationType 304 Stainless Steel is a variation of the basic 18-8 grade, Type 302, with a higher chromium and lower carbon content. Its lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. This austenitic Cr-Ni stainless steel possesses high ductility, excellent drawing, forming, and spinning properties. It is essentially non-magnetic, becomes slightly magnetic when cold worked. Type 304L is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the “as welded” condition, even in severe corrosive conditions. In many cases it eliminates the necessity of annealing weldments except for applications specifying stress relief. Type 304L has slightly lower mechanical properties than Type 304.
Effects of Space environmentThe natural oxide layer is not repaired in vacuum when damaged. Cold welding might occur in contact to similar materials.
Chemical Composition8 to 12% Ni, 18 to 20% Cr, 2% Mn max, 1% Si max, 0.03% C max, Rem. Fe
Name of ManufacturerMany European suppliers.
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Cost RangeLow
Equivalent Designations1.4306, 1.4307, X18BC,AISI304L
Space ExperienceGood
PHYSICAL PROPERTIES
Crystal StructureFace centered cubic (fcc)
Specific Gravity7.95
Magnetic PropertiesNonmagnetic
ELASTIC PROPERTIES
Tensile Modulus193 to 200 GPa
Shear Modulus80 GPa @ Room temperature
Poisson Ratio0.29
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
General Corrosion StatusNo specific corrosion protection required
Stress Corrosion StatusHigh 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 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 RecommendationsAISI 304L is the low carbon version of AISI 304 (0.08 %C) which may be susceptible to intergranular corrosion in certain corrosive media after it is welded or otherwise heated at temperatures between 430 and 860°C. · For welded applications avoid the unstabilised, higher carbon, versions.