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Grade 347
USA UNS S34700
Corresponding Standard ASTM A313/A313M-2018
Stainless Steel Spring Wire
Classification Austenitic Stainless Steel
Properties Elasticity Corrosion Resistance
347 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 10×C min Nb
Maximum Value 0.08 1 2 0.045 0.03 19 13
347 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
d≤0.25 Cold Drawing 1690~1895
0.25＜d≤0.38 Cold Drawing 1655~1860
0.38＜d≤0.61 Cold Drawing 1620~1825
0.61<d≤1.04; Bending Test Count ≥8 Cold Drawing 1620~1825
1.04<d≤1.19; Bending Test Count ≥8 Cold Drawing 1585~1790
1.19<d≤1.37; Bending Test Count ≥8 Cold Drawing 1550~1760
1.37<d≤1.57; Bending Test Count ≥7 Cold Drawing 1515~1725
1.57<d≤1.83; Bending Test Count ≥7 Cold Drawing 1480~1690
1.82<d≤2.03; Bending Test Count ≥7 Cold Drawing 1450~1655
2.03<d≤2.34; Bending Test Count ≥7 Cold Drawing 1415~1620
2.34<d≤2.67; Bending Test Count ≥5 Cold Drawing 1380~1585
2.67<d≤3.05; Bending Test Count ≥5 Cold Drawing 1345~1550
3.05<d≤3.76; Bending Test Count ≥3 Cold Drawing 1275~1480
3.76<d≤4.22; Bending Test Count ≥3 Cold Drawing 1240~1450
4.22<d≤4.5; Bending Test Count ≥3 Cold Drawing 1170~1380
4.5<d≤5.26; Bending Test Count ≥1 Cold Drawing 1105~1310
5.26<d≤5.72; Bending Test Count ≥1 Cold Drawing 1070~1275
5.72<d≤6.35; Bending Test Count ≥1 Cold Drawing 1035~1240
6.35<d≤7.92; Bending Test Count ≥1 Cold Drawing 965~1170
7.92<d≤9.53; Bending Test Count ≥1 Cold Drawing 930~1140
9.53＜d≤12.7 Cold Drawing 895~1105
d＞12.7 Cold Drawing 860~1070
1 Approximate Comparison Table Austenitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
2 Approximate Comparison Table Austenitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
06Cr18Ni11Nb
(0Cr18Ni11Nb) 		S34778 347 SUS 347 STS 347 347 S34700 X6CrNiNb 18-10 X6CrNiNb 18-10
(X10CrNiNb18-9) 		1.4550 Z6CNNb 18-10 X6CrNiNb 18-10 1.4550 08Х18Н12Б 2338 347S17
347S31
347 Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
347 S34700
2 ASTM A193/A193M-2001
347 A193 B8C Class 1 S34700
3 ASTM A240/240M-2018
347 S34700
4 SAE J405-1998
347 S34700
5 SAE J467b-1956(R1968)
347
6 ASTM A276/A276M-2017
347 S34700
7 ASTM A193/A193M-2019
347 A193 B8C Class 1 S34700
8 ASTM A320/A320M-2018
347 A320 B8C Class 1 S34700
9 ASTM A473-2018
347 S34700
10 SAE J405-2018
347 S34700
11 ASTM A313/A313M-2018
347 S34700
12 ASTM A240/A240M-2020
347 S34700
13 ASTM A193/A193M-2020
347 A193 B8C Class 1 S34700
14 ASTM A959-2019
347 S34700
15 ASTM A320/A320M-2021
347 A320 B8C Class 1 S34700
16 SAE AMS 5646P-2014
347 30347 18Cr - 11 Ni -0.60Cb(Nb)
17 ASTM A479/A479M-2018
347 S34700
18 ASTM A194/A194M-2023
347 A194 Grade 8C S34700
19 ASTM A403/A403M-2022
347 WP347 S34700
20 CNS 3477-2016
347

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