SUS444 stainless steel

SUS444 product introduction

1. Overview of SUS444 products

The SUS444 stainless steel produced by our company, which is the SUS444 stainless steel which is produced by optimizing the process according to the Japanese standard JIS G 4305 (SUS444).

SUS444 stainless steel is a super low carbon nitrogen, 18% chromium and 2% molybdenum, high corrosion resistant ferrite stainless steel. The steel is usually stabilized by NB or Nb + Ti, which can avoid the intergranular corrosion of weld heat affected zone. Compared with austenitic stainless steel SUS304 and SUS316L, this steel has better resistance to chloride ion stress corrosion cracking and chloride ion pitting corrosion than SUS304, which is equivalent to SUS316L. Therefore, the steel is particularly suitable for producing various water treatment devices.

2. Chemical composition of SUS444 products

Standard brand C% N% Cr% Ni% Mo%

JIS G4305 0.01 0.01 18.6 - 2

SUS444 typical

SUS444 less than 0.025 or less than 0.025 17.00-20.00 1.75-2.5

SUS304 is less than 0.08 - 18.00-20.00 8.00-10.50 -

SUS316L is less than 0.030 - 16.00-8.00 12.00-15.00 2.00-3.00

3, 444 mechanical properties of products

Brand yield strength N/mm2 tensile strength N/mm2 elongation% Vivtorinox hardness cold bending 180 degrees d=2a

31050030160 qualified

SUS444 typical

SUS444 equal to 245 or more, 410 or more, 20 or more, 230.

SUS304 equal to 205 or greater than 520, equal to 40 or more 200.

SUS316L equal to 175 or greater than 480, equal to 40 or more 200.

4, 444 stress corrosion resistance of products

Test material SUS304 SUS316L SUS444

Crack initiation time is 2.5 9.848 hours without cracks.(hour)

Crack penetration time is 2.5 11.848 hours without cracks.(hour)

The surface morphology of the specimen after test is shown below.

Our SUS444 stainless steel is produced by optimizing the process according to the Japanese standard JIS G 4305