Material No.: 1.4878

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

Description

EN symbol (short)X8CrNiTi18 10
UNSS 32109
Grade TP 321H
AFNORX8CrNiTi18 10 /NF EN 10088-1 (06/2005) (FR)
BSX8CrNiTi18 10 /NF EN 10088-1 (06/2005) (GB)
Density kg/dm37,9
Hardness HB<=215
Compositionchromium nickel steel
CategoryHeat resistant steels and alloys
Structureaustenitic
Corrosionhigh corrosion resistance

Chemical Composition

 901CSiMnPSCrNiFeTiC
1.4878Min %     17,009,00 >=5xC 
Max %0,101,002,000,0450,01519,0012,00 <=0,80 
(Key to steel 2010)
S 32109Min %     17,009,00  0,04
Max % 1,002,000,0450,03020,0013,00 0,60*0,10
ASTM A312 (S 32109)-(TP 321H)

Physical properties

PropertyValue
Density: kg/dm37,9
Hardness: HB<=215
magnetizableno
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 (--)    
200 / 392    17,0 (--)
400 / 752    18,0 (--)
600 / 1112    18,6 (--)
800 / 1472    19,1 (--)
Temp.Creep strain limitCreep strain limitCreep rupture strengthCreep rupture strengthCreep rupture strength
° C/ °FRp 1,0 /10 000h10 000h100 000h
° C/ °FN/ mm2 / ksiN/ mm2 / ksiN/ mm2 / ksi
400 / 752     
500 / 932     
600 /111285 /12,3 115 / 16,665/ 9,4 
700 / 129230 / 4,3 45 / 6,522 /3,2 
800 7 147210 / 1,45 20 / 2,910 /1,45 
ksi value calculated

Mechanical properties (20°C / 68°F)

0,2% Yield strength Rp0,2 Mpa/ksi>=210/>=30,4
Tensile strenght Rm(20°C)500-700 Mpasolution heat treatment
Elongation A5>=40%solution heat treatment

Temparature information

Application area
Operation temperature ºF  to 1562 ºF scaling resistance (air) up to 1560°F
Solution heat treatment
Working temperature1868 ºF  to 2048 ºF 
Explanation reportcooldown: air / water
Solution heat treatment
Working temperature1562 ºF  to 2012 ºF 
Explanation reportcooldown

Standards / information

StandardsDesciption
ASTM A 213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger Tubes
ASTM A 240sheet metal and ribbons from stainless Cr and Ni pressure containers
ASTM A 276 Rods and cross-sections made of stainless and heat-resistant steel
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
ASTM A 479Rods and cross-sections made of stainless and heat-resistant steel used in boilers and other pressure tanks
DIN EN 10088-1 (09/2005)Stainless steels Part 1: List of stainless steels
DIN EN 10095 (05/1999)heat resistant steel and nickel alloy
SEW 470 (02/1976)heat-resisting rolled and forged steels

Process information

Welding
 - TypeWIG
submerged arc welding
MAG solid wire
manual arc welding (E)
 - Add. material1.4548,1.4370

Main fields of application

Details of applicationscaling resistance in air up to 1562°F
Certifications
industral furnace engineeringmuffles
annealing tubes
muffle pipes
annealing hood

Range of products

Product typeProduct
Processing / Constructionfrom pipes, fittings, flanges (welded)
from bar steel (turning, milling)
Fittingswelded elbows
welded reductions
Welded T-pieces
seamless elbows
seamless reductions
seamless T-pieces
Other Fittings a.o. Weldolets, Nipples
Flanges / Collars / Flared tube endsvarious flanges (weld neck flange,blind flange etc.)
Pipes / Tubeswelded pipes/tubes
seamless pipes/tubes
Bar steelflat steel
round bar steel
Equipmentscrews, screw nuts,shims, straight turning parts, designed components

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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