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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HongChao (DongGuan) Stainless Steel,INC.

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Tangxia town,Dongguan city

Guangdong,China

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