Material 1.4550

Stainless steel

Grade 1.4550 is an austenitic additionally niobium alloyed stainless steel. Niobium is being used for stabilization. As a consequence it is very intergranular corrosion resistant. 1.4550 can often be found in the chemical industry as well as the power plant construction.

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1.4550

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
X6CrNiTi18-Nb18-10 AISI 347 UNS S34700 X6CrNiNb1811 X6CrNiNb1811KG X6CrNiNb1811KW X6CrNiNb1811KT SUS347 SUS347FB SUS347HFB SUS347HTB SUS347HTF SUS347HTP SUS347TB SUS347TF SUS347TKA SUS347TP SUSF347 SUSY347 request

Material Category: Stainless steel

Chemical Composition

C % Si % Mn % P % S % Cr % Ni % -
max 0,08 max 1,00 max 2,00 max 0,045 max 0,015 17,00 - 19,00 9,00 - 12,00 Nb 10xC <= 1,00

 

Mechanical Properties

lösungsgeglüht 0,2% Dehngrenze (Rp0,2) /
bei Temperatur		 1% Dehngrenze (Rp1,0) Zugfestigkeit (Rm) Bruchdehnung (A5, 65) Einschnürung (Z) Härte [HB 30] Kerbschlagarbeit
KV (ISO-V/Charpy-V)		 Probenlage
<= 160 mm       >= 40 %     >= 100 Joule längs
160 - 250 mm       >= 30 %     >= 60 Joule quer
<= 250 mm >= 205 N/mm² >= 240 N/mm² 510 - 740 N/mm²   >= 50 % <= 230 HB 30   längs
  >= 118 N/mm² / ~ 550 ° C              
  >= 119 N/mm² / ~ 500 ° C              
  >= 121 N/mm² / ~ 450 ° C              
  >= 125 N/mm² / ~ 400 ° C              
  >= 130 N/mm² / ~ 350 ° C              
  >= 136 N/mm² / ~ 300 ° C              
  >= 145 N/mm² / ~ 250 ° C              
  >= 155N/mm² / ~ 200 ° C              
  >= 165 N/mm² / ~ 150 ° C              
  >= 175 N/mm² / ~ 100 ° C              

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