Grade WP304H
USA UNS S30409
AISI
American Iron and Steel Institute
304H
Corresponding Standard ASTM A403/A403M-2022
Wrought Austenitic Stainless Steel Piping Fittings
Classification Austenitic Stainless Steel
WP304H Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni
Minimum Value 0.04 - - - - 18 8
Maximum Value 0.1 1 2 0.045 0.03 20 11
WP304H Mechanical Properties
condition Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Pipe Fittings ≥515 ≥205 Standard round specimen, or small specimen, or strip specimen
L0=4D
long: ≥28
tr: ≥20
1 Approximate Comparison Table Austenitic Stainless Steel
China Japan United States International Organization for Standardization Germany European Standard
GB ISC JIS AISI UNS ISO DIN EN/DIN W-Nr. EN Numerical Grade
07Cr19Ni10 S30409 SUS 304H 304H S30409 X6CrNi 18-10
X7CrNi 18-9
X6CrNi18-10 1.4948 X6CrNi18-10 1.4948
2 Approximate Comparison Table
Japan United States International Organization for Standardization France European Standard Russia
JIS ASTM UNS ISO NF EN/NF EN Numerical Grade GOST
SUS304H 304H S30409 X7CrNi18-9 Z6CN18-09 X6CrNi18-10 1.4948 08KH18N10

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