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Grade 347H
USA UNS S34709
Corresponding Standard SAE J405-1998
（R）Chemical Composition of SAE Wrought Stainless Steels
Classification Austenitic Stainless Steel
347H Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Nb
Minimum Value 0.04 - - - - 17 9 0.4
Maximum Value 0.1 0.75 2 0.045 0.03 19 13 1
New and Old Grade Replacement List
Corresponding Standard Grade
SAE J405-1998
Grade
USA UNS
SAE J405-2018
USA UNS
AISI
Approximate Comparison Table Austenitic Stainless Steel
China Japan United States International Organization for Standardization France European Standard
GB ISC JIS ASTM/AISI UNS ISO Numerical Grade NF EN/NF EN Numerical Grade
07Cr18Ni11Nb
(1Cr19Ni11Nb) 		S34779 SUS347H 347H S34709 X7CrNiNb18-10 4912-347-09-I Z2CND17-11
Z2CND18-13
Z8CNNb18-10 		X7CrNiNb18-10 1.4912
347H Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
347H S34709
2 ASTM A240/240M-2018
347H S34709
3 SAE J405-1998
347H S34709
4 SAE J405-2018
347H S34709
5 ASTM A240/A240M-2020
347H S34709
6 ASTM A959-2019
347H S34709
7 ASTM A479/A479M-2018
347H S34709
8 ASTM A403/A403M-2022
347H WP347H S34709

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