Türkçe
Technical Info/ Ferritic Stainless Steels
These steels are, in principle, ferritic at all temperatures. This is achieved by a low content of austenite forming elements, mainly nickel, and a high content of ferrite forming elements, mainly chromium.
The older types, such as AISI 430, were mainly used for household utensils and other purposes where corrosion conditions are not particularly demanding.
Steels with high chromium content, such as AISI 446 with 27% chromium, are used at high temperatures where their resistance to sulphurous flue gages is an advantage. However, the risk of 475 °C embrittlement and precipitation of brittle sigma phase in high-chromium steels must always be taken into consideration.
Today's ferritic steels, such as S44400 with extremely low carbon and nitrogen contents, find greatest use where there is a risk of stress-corrosion cracking.
Ferritic steels have slightly higher yield strength (R p 0.2 ) than austenitic steels, but they have less elongation at fracture. Another characteristic that distinguishes ferritic steel from austenitic material is that ferritic steels have much lower strain hardening.
The older types, such as AISI 430, were mainly used for household utensils and other purposes where corrosion conditions are not particularly demanding.
Steels with high chromium content, such as AISI 446 with 27% chromium, are used at high temperatures where their resistance to sulphurous flue gages is an advantage. However, the risk of 475 °C embrittlement and precipitation of brittle sigma phase in high-chromium steels must always be taken into consideration.
Today's ferritic steels, such as S44400 with extremely low carbon and nitrogen contents, find greatest use where there is a risk of stress-corrosion cracking.
Ferritic steels have slightly higher yield strength (R p 0.2 ) than austenitic steels, but they have less elongation at fracture. Another characteristic that distinguishes ferritic steel from austenitic material is that ferritic steels have much lower strain hardening.
News
-
» New Web Site for Publication Started.September.27.2010
Copyright © 2010
MATMETAL Steel - Steel Products Mak.San. and Tic.A.S.
Address : 2825 Sokak no:34 I.Sanayi Sitesi / IZMIR / TURKEY
Tel : +90 (232) 433 70 51 • +90 (232) 433 96 62 • Factory Tel : +90 (232) 877 11 60 • Fax : +90 (232) 433 91 74
E-Mail : info@matmetal.com
MATMETAL Steel - Steel Products Mak.San. and Tic.A.S.
Address : 2825 Sokak no:34 I.Sanayi Sitesi / IZMIR / TURKEY
Tel : +90 (232) 433 70 51 • +90 (232) 433 96 62 • Factory Tel : +90 (232) 877 11 60 • Fax : +90 (232) 433 91 74
E-Mail : info@matmetal.com
Number of Visitors :
