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Home Material ASTM A789/A789M-2024
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USA UNS S33207
Corresponding Standard ASTM A789/A789M-2024
Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
Classification Duplex Stainless Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo N
Minimum Value - - - - - 29 6 - 3 0.4
Maximum Value 0.03 0.8 1.5 0.035 0.01 33 9 1 5 0.6
Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
Pipe; t＜4 Solution heat treatment 1040~1140°C, rapid cooling by water or other methods ≥950 ≥770 ≥15 HBW: ≤336
HRC: ≤36
HV: ≤330*
Pipe; t≥4 Solution heat treatment 1040~1140°C, rapid cooling by water or other methods ≥850 ≥700 ≥15 HBW: ≤336
HRC: ≤36
HV: ≤330*
Approximate Comparison Table Austenitic-Ferritic Stainless Steel
United States International Organization for Standardization European Standard
UNS ISO Numerical Grade Numerical Grade
S33207 X2CrNiMoN31-8-4 4485-332-07-U (1.4485)

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