Material No.: 1.4301



EN symbol (short)X5CrNi18-10
UNSS 30400
Grade 304
AFNORNF EN 10088-1(06/2005) (FR)
BSEN 10088-1 (06/2005) (GB)
Density kg/dm37,9
Hardness HB160-190
Compositionchromium nickel steel
CategoryStainless steels
steel, resistant to rust and acids
Corrosionresistance to intercristalline corrosion up to 0.2" ???
against crevice corrosion
Additional characteristicschemically resistant
high resistance to sulfurous gas in high temperatures to 5mm
DescriptionThis stainless austenitic chrome nickel steel 1.4301 shows high resistance to corrosion (especially in natural environments/sea water and those with low chlorine/salt concentration levels) and is well weldable.
Application areas involving acids require specific testing. Polishes well and is suited for deep drawing.
Areas of use include chemical industry, mineral oil industry, petrochemistry and automobile industry.

Chemical Composition

1.4301Min %    17,50  8,00
Max %0,072,000,0450,01519,501,000,11010,50
(Key to steel 2010) DIN-Norms may deviate in some aspects due to different product types
AISI 304
S 30400
Min %    18,00  8,00
Max %0,082,000,0450,03020,001,00 11,00
ASTM A 312-(S 30400) TP 304

Physical properties

Density: kg/dm37,9
Hardness: HB160-190
Rockwell Hardness Number max..B90 (TP 304-ASTM A 249)
MagnetizabilityNo (may change by cold forming)
Temperature T
Specific heat
J / kgK
(Btu / lb °F)
Thermal conductivity
(Btu·in / ft2·h·°F)
Electric resistance
µΩ · cm
(Ω circ mill / ft)
Modulus of elasticity
(103 ksi)
Expansion rate from 70°F bis T
10-6 / K
(10-6 / °F)
20°/ 68°500 (-)15,0 (-)0,73 (-)200 (-) 
100° / 212° 16,0 (-) 194 (-)16,0 (-)
400° / 752° 17,5 (-) 172 (-)17,5 (-)
500° / 932° 18,0 (-) 165 (-)18,0 (-)
600°/1112° 18,5 (-)   
700° / 1292° 18,5 (-)   
800° / 1472° 19,0 (-)   
Temperature0.2% Yield strength in high temperatures1.0 % Yield strength in high temperaturesTensile strength in high temperatures
°C / °FRp 0,2Rp 1,0Rm
MPa /ksiMPa /ksiMPa / ksi
100 / 212>=155 / >=22,5>=190 / >=27,55450 / 65,3
200 / 392>=127 / >=18,4>=155 />=22,5400 / 58,0
300 / 572>=110 / >= 16,0>=135 / >=19,6380 / 55,1
400 / 752>=98 / >= 14,2>=125 / >=18,1380 / 55,1
500 / 932>=92 / >= 13,3>=120 / >=17,4 
ksi value calculated
Deviations possible between different pre-treatments

Mechanical properties (20°C / 68°F)

Yield strength Rp 1,0 (ksi)
Yield strength (ksi/Mpa)
30 / 205

TP 304 (ASTM A 249)
0.2% Yield strength Rp 0,2>=230 N/mm2
Tensile strength (Mpa)/ (ksi)
Tensile strength ksi (Mpa)
500-700 /72,5-101,5
75 (515)

TP 304 (ASTM A 249)
Elongation (A5) %
Elongation %

in 2 in.or 50mm

TP 304 (ASTM A 249)
Notched impact strength ISO-V60 J<=75 mm transverse

Temparature information

Application area
Operation temperature-454 ºF  to 1112 ºF max.
Explanation reportDue to chromium carbide dispersion tendencies, thoroughly test operation temperatures from 840°F-1560°F (DIN EN 10088-3)
Solution heat treatment
Working temperature1886 ºF  to 2030 ºF 
Explanation reportair/ water *
Processing informationsadequate cool down duration
Working temperature1832 ºF  to 2012 ºF period:~5 min/mm thickness
Solution heat treatment
Working temperature1562 ºF  to 2102 ºF 
Explanation reportcool down air/water

Standards / information

ASTM A 182Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges,Forged Fittings and Valves and Parts for High-Temperature Service
ASTM A 213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger Tubes
ASTM A 249 Standard Specification for Welded austenitic steel boiler, Superheaters, heat-exchangers,and condenser Tubes
ASTM A 269Standard Specification for Seamless and welded, austenic, and stainless steel tubing for general purposes
ASTM A 312 Standard Specification for Seamless and welded austenitic stainless steel pipes
ASTM A 403 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
DIN EN 10028-7 (02/2008)flat products made from steel for pressure tanks Part 7: Stainless steel
DIN EN 10088-1 (09/2005)Stainless steels Part 1: List of stainless steels
DIN EN 10088-2 (09/2005)stainless steel; sheet metal and ribbons out of corrosion resistant steel for general purposes
DIN EN 10088-3 (09/2005)stainless steels.Technical delivery conditions for semi-finished products,bars,rods,wire selection and bright products of corrosion resisting steels for general and construction purposes
DIN EN 10088-4 (08/2009)stainless steel.Building industry: Technical transport conditions for corrosion resistant sheet metal and ribbons
DIN EN 10216-5 (11/2004+B1)Seamless steel tubes under compression load Stainless steel tubes
DIN EN 10217-7 (05/2005)Welded steel tubes under compression load. Stainless steel tubes
DIN EN 10296-2 (02/2006)welded circular steel pipes for machine construction and general technical applications, stainless steel
DIN EN 10297-2 (02/2006)seamless circular steel pipes for machine construction and general technical applications, stainless steel
SEW 310 (08/1992)physical properties of steel

Process information

Chip removing processsolidification danger - choose depth of cut so solidification area will be cut
 - Material classification acc. CEN ISO/TR 156088.1
 - Typewell weldable
 - Add. material1.4302;1.4316;1.14551
 - Hintsspecial post heat treating not required

Main fields of application

Details of applicationThis steel is well suited for inside and outside applications, due to it's resistance to organic/inorganic weak acids, water and moisture.
It's polishable and fit for deep drawing.
Please do a test run before using this material with strong acids.
Not suited for application areas involving sea water.
CertificationsCertified for purchase obligating pressure containers in accordance to AD-information sheet W2
Delivery conditions according to DIN 17456; DIN17458
Chemical IndustryDetergent production and soap making
Environmental technologyclarification plants
petrochemical industry
building industryhand rail consruction
cellulose/paper industrydevices
chemical digestion containers
bleaching containers

Range of products

Product typeProduct
Processing / Constructionfrom sheets
from pipes, fittings, flanges (welded)
from bar steel (turning, milling)
Plates / Sheetsplates/sheets
plate/sheet cuts
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless reductions
seamless T-pieces
Other Fittings a.o. Weldolets, Nipples
Flanges / Collars / Flared tube endsflared tube end
various flanges (weld neck flange,blind flange etc.)
weld neck flange/blind flange
Bumped boiler ends / caps / round blanksfrom sheets
from bar steel
Pipes / Tubeswelded pipes/tubes
welded square pipes/tubes
Hollow bar
seamless pipes/tubes
Round barforged raw
Bar steelflat steel
section steel
round bar steel
hexagon steel

Liability exclusion

All aforementioned specifications serve as a general orientation and have to be reviewed depending on the conditions of use.
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