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SS317 / SS317L

Stainless steel 317 (SS317) is a modified version of stainless steel 316 (SS316) with higher molybdenum (Mo) addition to improve the pitting-corrosion resistance as well as enhance its strength. Stainless steel 317L (SS317L) is the low carbon version of SS317 providing improved corrosion resistance relative to stainless steel 316L (SS316L). The low carbon permits SS317L to be welded without sensitization to intergranular corrosion resulting from chromium carbide precipitation in the grain boundaries. Both SS317 and SS317L are widely used in pulp and paper making industry, chemical processing, petrochemical piping and textile industry.

ASTM A276 SS317 round bars, UNS31700

ASTM A276 SS317 round bars, O.D=4″ Length=6m, UNS31700

1. UNS Designation & International Equivalent

TypeUNSJISEN/DINEN/BSEN/NFISOGBGOST
317S31700SUS 317X5CrNiMo17-13-3316S33--0Cr19Ni13Mo308KH17H15M3T
317LS31703SUS 317LX2CrNiMo18-15-4Part 4 317S12X2CrNiMo18-15-42400Cr19Ni13Mo303KH16H15M3

2. Product Forms and Standards

Product FormsMaterial Standards
Plates, Sheets & StripsASTM A240
Billets, Bars & RodsASTM A276, A314, A479.
Forgings(Flanges & Fittings)ASTM A182, A473.
WiresASTM A478, A580.
Seamless and Welded PipesASTM A312, A358, A813, A814.
Wrought Pipe FittingsASTM A403
*Especially, Metals-Piping supplies SS317/ SS317L in the grades of ASTM A312 TP317/ TP317L, ASTM A182 F317/ F317L, ASTM A403 WP317/ WP317L.

3. Physical Properties of SS317/ SS317L

ASTM A312 TP317L seamless pipes, 12" STD.

ASTM A312 TP317L seamless pipes, 12″ STD.

DensityMelting PointThermal Expansion CoefficientThermal Conductivity
g/cm3°Cµm/m°CW/mk
8.0013701616.3

5. Chemical Composition of SS317/ SS317L

Element317317L
Carbon≤0.08≤0.030
Manganese≤2.00≤2.00
Phosphorus≤0.045≤0.045
Sulfur≤0.030≤0.030
Silicon≤0.75≤0.75
Chromium18.0-20.018.0-20.0
Nickel11.0-15.011.0-15.0
Molybdenum3.0-4.03.0-4.0
Nitrogen≤0.10≤0.10

6. Mechanical Properties of SS317/ SS317L

MechanicalTensile Strength, minYield Strength, minElongationHardness
GradeksiMpaksiMpa%HBWRockwell
31775515302053521795HRBW
317L75515302054021795HRBW

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Austenitic Stainless Steel

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    Hebei Metals Industrial Limited
    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
    No. 176, Zhonghua South Street, Shijiazhuang, China.
    Tel: +86-311-89642206
    Fax:+86-311-67906676
    Web: www.metalspiping.com
    Email: sales@metalspiping.com