444 (UNS S44400)
- 444 Ferritic Stainless Steel
UNS S44400
Introduction
444 (UNS S44400) is a kind of ferritic stainless steel with low carbon and low nitrogen
as well as 18% chromium and 2% molybdenum. 444 has good resistance to pitting and crevice corrosion with good corrosion resistance.And the pitting and crevice corrosion resistance is superior to most ferritic stainless ones. And the immunity to chloride stress corrosion cracking is the advantage of 444.
Properties
444 has excellent corrosion resistance in moderately severe environments with chlorides and organic acids. It also provides satisfactory resistance to dilute sulfuric acid solutions and to highly concentrated sodium hydroxide.
Chemical Composition of 444 (UNS S44400)
Grade C Mn Si P S Cr Ni N
444 min -- -- -- -- -- 17.5 -- --
max 0.025 1.0 1.0 0.04 0.03 19.5 1.00 0.035
Process of 444 (UNS S44400)
Preheat / ℃ initial forging temperature / ℃ final forging temperature / ℃ Cooling
760 1100 ~ 1140 705 ~ 790 air-cooled
Heat treatment of 444 (UNS S44400)
Annealing temperature is 800 ~ 1050 ℃, rapid cooling, the hardness ≤ 217HBW.
Application
444 (UNS S44400) can be used with the requirement of corrosion resistance and resistance to chloride stress corrosion cracking. Typicallly use of 444 is shown as below:
• food processing
• brewery and wine-making equipment
• hot-water tanks and heat exchanger tubing
• automotive components.
Please contact our company service (hotline:86 0510-83,632,628) to get more information on 444 (UNS S44400) about selection, application, heat treatment and inventory and other related information,you can also contact us for more information about ferritic stainless steel and stainless steel.
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