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Grade F593 347
USA UNS S34700
Corresponding Standard ASTM F593-2017
Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs
Classification Austenitic Stainless Steel
F593 347 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni More
Minimum Value - - - - - 17 9 Cb+Ta≥10C
Maximum Value 0.08 1 2 0.045 0.03 19 13
F593 347 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
ksi 		Yield Point
σs
ksi 		Elongation or Extension Rate
δ
% 		Hardness
HBW
1/4 ~ 1-1/2 (Full-Size) AF 65~85 ≥20 HR (B85 max)
1/4 ~ 1-1/2 (Full-Size) A 75~100 ≥30 HR (B65~95)
1/4 ~ 5/8 (Full-Size) CW1 100~150 ≥65 HR (B95~C32)
3/4 ~ 1-1/2 (Full-Size) CW2 85~140 ≥45 HR (B80~C32)
1/4 ~ 5/8 (Full-Size) SH1 120~160 ≥95 HR (C24~C36)
3/4 ~ 1 (Full-Size) SH2 110~150 ≥75 HR (C20~C32)
1-1/8 ~ 1-1/4 (Full-Size) SH3 100~140 ≥60 HR (B95~C30)
1-3/8 ~ 1-1/2 (Full-Size) SH4 95~130 ≥45 HR (B90~C28)
1/4 ~ 1-1/2 (Machined) AF ≥60 ≥20 ≥40
1/4 ~ 1-1/2 (Machined) A ≥70 ≥30 ≥30
1/4 ~ 5/8 (Machined) CW1 ≥95 ≥60 ≥20
3/4 ~ 1-1/2 (Machined) CW2 ≥80 ≥40 ≥25
1/4 ~ 5/8 (Machined) SH1 ≥115 ≥90 ≥12
3/4 ~ 1 (Machined) SH2 ≥105 ≥70 ≥15
1-1/8 ~ 1-1/4 (Machined) SH3 ≥95 ≥55 ≥20
1-3/8 ~ 1-1/2 (Machined) SH4 ≥90 ≥40 ≥28
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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