Material No.: S 31254

DescriptionChemical
composition		Physical
mechanical
properties		Temparature
information		StandardsProcess
information		Application
Certification		ProductsAll

Description

EN symbol (short)X1CrNiMoCuN20-18-7
Material No.1.4547
AFNORX1CrNiMoCuN20-18-7 / NF EN 10217-7 (02/2005) (FR)
BSX1CrNiMoCuN20-18-7 / B.S.EN 10217-7 (02/2005) (GB)
Registered work's label254 SMO®
Density kg/dm38,0
Hardness HB<= 360
Compositionchromium nickel molybdenium steels
CategoryStainless steels
Structureaustenitic
Corrosionnon-corroding
chemically resistant

Chemical Composition

 CMnPSSiCrNiMoNCu
S 31254Min %     19,5017,506,000,180,50
Max %0,201,000,0300,0100,8020,5018,506,500,221,00
ASTM A 312 (S 31254)
1.4547Min %     19,5017,506,000,180,50
Max %0,0201,00 0,0100,7020,5018,507,000,251,00
(Key to steel 2010)

Physical properties

PropertyValue
Density: kg/dm38,0
Hardness: HB<= 360
magnetizableno
impact work (ISO-V) (J)>100
Temperature T
°C/F
(°C/F)		Specific heat
J / kgK
(Btu / lb °F)		Thermal conductivity
W/mK
(Btu·in / ft2·h·°F)		Electric resistance
µΩ · cm
(Ω circ mill / ft)		Modulus of elasticity
kN/mm2
(103 ksi)		Expansion rate from 70°F bis T
10-6 / K
(10-6 / °F)
20 / 68500 (--)13 (--)0,85 (--)  
100 / 212520 (--)14 (--)0,90 (--) 16,0 (--)
200 / 392540 (--)15 (--)0,95 (--) 16,0 (--)
300 / 572555 (--)17 (--)1,03 (--) 16,5 (--)
400 / 752570 (--)18 (--)1,10 (--) 17,0 (--)
Temperature1,0% Yield strength

in high temperatures
°C / °FRp 1,0
N/mm2 / ksi
100 / 212270 / 39,1
200 / 392225 / 32,6
300 / 572200 / 29,0
400 / 752190 / 27,5
500 7 932180 / 26,1
ksi value calculated

Mechanical properties (20°C / 68°F)

1,0 % Yield strength (Mpa) / (ksi)340 / 49,3
0,2 % Yield strength (Mpa) / (ksi)300 /43,5
Tensile strength Rm (Mpa) /(ksi)650-850 / 94-123
Elongation A5 (%)35
impact work ISO-V (J)70

Temparature information

Application area
Operation temperature ºF  to 752 ºF operating temperature limit
Solution heat treatment
Working temperature2102 ºF  to 2192 ºF 
Explanation reportcool down:water
Solution heat treatment
Working temperature1832 ºF  to 2102 ºF 
Explanation reportcool down: air

Standards / information

StandardsDesciption
ASTM A 213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger Tubes
ASTM A 312 Standard Specification for Seamless and welded austenitic stainless steel pipes
DIN EN 10088-1 (09/2005)Stainless steels Part 1: List of stainless steels
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 10217-7Welded steel pipes under compression load Pipes made from stainless steel
DIN EN 10297-2 (02/2006)Welded circular steel pipes for machine construction and general technical service stainless steel. Pipes made from stainless steel
VdTÜV / Werkstoffblatt 473Austenitic steel X1 CrNiMoCu 20 18 7

Process information

Chip removing processprocess in annealed state
Welding
 - Material classification acc. CEN ISO/TR 156088.2
 - Typewell weldable
 - Add. materialNiCr20Mo9Nb

Main fields of application

Details of application
Certifications
Chemical Industry
petrochemical industry
Rauchgasentschwefelungsanlagen(REA)
Papierindustrie/Zellstoffindustrie
sea and lake water plants

Range of products

Product typeProduct
Plates / Sheetsplates/sheets
plate/sheet cuts
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Flanges / Collars / Flared tube endsweld neck flange/blind flange
Pipes / Tubeswelded pipes/tubes
seamless pipes/tubes
Bar steelsection steel
round bar 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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