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

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