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  Austenitic stainless steel UNS grade: S34700 General material grade: 347
Serial number category Material grade Reference standards Chemical composition Mechanical properties
C Mn P S Si Ni Cr Nb   other yield Stretch Elongation hardness Section Heat treatment/
Strength σ0.2 strength (Vertical) Shrinkage Quench Media
% % % % % % % % % % (MPa) (MPa) % HBW (%) ℃/cooling
1 American standard pipe fittings WP347 ASTM A403/403M-20 ≤0.08 ≤2.00 ≤0.045 ≤0.030 ≤1.00 9.0-12.0 17.00-19.00 10*C-1.10     ≥205 ≥515 ≥28     ≥1040℃/water cooling
2 American Standard Steel Pipe TP347 ASTM A312/312M-21 ≤0.08 ≤2.00 ≤0.045 ≤0.030 ≤1.00 9.0-13.0 17.0-19.0 10*C-1.0     ≥205 ≥515 ≥35     1040℃/water cooling
3 American Standard Plate 347 ASTM A240/A240M-20 ≤0.08 ≤2.00 ≤0.045 ≤0.030 ≤0.75 9.0-13.0 17.0-19.0 10*C-1.0     ≥205 ≥515 ≥40 ≤201    
4 American Standard Forgings F347 ASTM A182/182M-21 ≤0.08 ≤2.00 ≤0.045 ≤0.030 ≤1.00 9.0-13.0 17.0-20.0 10*C-1.10     ≥205 ≥515 ≥30   ≥50 1040℃/water cooling
5 National standard pipe fittings SF347 GB/T13401-2017 ≤0.08 ≤2.00 ≤0.045 ≤0.030 ≤1.00 9.00-13.00 17.00-20.00 10*C-1.10     ≥205 ≥515 ≥30 ≤201   Solution treatment
6 National standard steel pipe 06Cr18Ni11Nb GB/T14976-2012 ≤0.08 ≤2.00 ≤0.035 ≤0.030 ≤1.00 9.00-12.00 17.00-19.00 10*C-1.10     ≥205 ≥520 ≥35     980-1150℃/water cooling
(S34778)
7 National standard forgings 06Cr18Ni11Nb NB/T47010-2017 ≤0.08 ≤2.00 ≤0.035 ≤0.015 ≤0.75 9.00-13.00 17.00-19.00 10*C-1.10     ≥205 ≥520 ≥40 ≤201   1050-1180℃/water cooling
(S34778)
8 European standard pipe fittings 1.455 EN10253-4:2008 ≤0.08 ≤2.00 ≤0.045 ≤0.015 ≤1.00 9.00-12.00 17.00-19.00 10*C-1.00     σ0.2≥205 510-740 ≥35 ≤210 at-196℃ 1020-1120℃ /water cooling
σ1.0≥240 ≥60
9 European standard forgings 1.455 EN10222-5:2017 ≤0.08 ≤2.00 ≤0.045 ≤0.015 ≤1.00 9.0-12.0 17.0-19.0 10*C-1.00     σ0.2≥205 510-710 ≥40   at-196℃ 1020-1120℃ /water cooling
σ1.0≥240 ≥40