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SS316 / SS316L

Stainless steel 316 (SS316) is an austenitic chromium-nickel stainless steel containing deliberate amount of molybdenum which increases general corrosion resistance and especially improves its pitting resistance to chloride ion solutions. The molybdenum addition also provides increased strength at elevated temperatures. Thus, SS316 is also known as “Mo-Added” version of SS304. Stainless steel 316L (SS316L) is the extra-low carbon version of SS316 that minimizes harmful carbide precipitation during welding. Both SS316 and SS316L have exceptional resistance to corrosion against sulfuric, hydrochloric, acetic, formic, and tartaric acids; as well as against acid sulfates and alkaline chlorides. They are widely used in exhaust manifolds, heat exchangers, pharmaceutical equipment, cryogenic piping, valve and pump trims, chemical & petrochemical process, pulp and paper industry, and food industry, etc.

ASTM A182 F316L S/O & W/N flanges, 150#.

ASTM A182 F316L S/O & W/N flanges, 150#.

1. UNS Designation & International Equivalent

TypeUNSJISEN/DINEN/BSEN/NFISOGBGOST
316S31600SUS316X5CrNiMo17-12-2316S31Z7CND17-12-2200Cr17Ni12Mo2 08KH17H13M2T
316LS31603SUS316LX2CrNiMo18-14-3316S13X2CrNiMo17-12-2 1900Cr17Ni14Mo203KH17H14M2

2. Product Forms and Standards of SS316/ SS316L

Ball valve with CF8M (SS316) body

A floating ball valve, 2″ PN16 split body, with ASTM A351 CF8M (SS316) body.

Product FormsMaterial Standards
Plates, Sheets & StripsASTM A240, A666
Billets, Bars & RodsASTM A276, A314, A479
Forgings(Flanges & Fittings)ASTM A182, A473.
WiresASTM A313, A368, A478, A492, A493, A580.
Seamless and Welded PipesASTM A312, A358, A813, A814.
Wrought Pipe FittingsASTM A403
Castings(Cast Fittings & Valve Parts)ASTM A351, A743, A744
*Especially, Metals-Piping supplies SS316/ SS316L in the grades of ASTM A312 TP316/ TP316L, ASTM A182 F316/ F316L, ASTM A403 WP316/ WP316L, ASTM A351 CF8M/ CF3M.

3. Physical Properties of SS316/ SS316L

DensityMelting RangeSpecific HeatMagnetic PermeabilityElectric Resistivity
g/cm3°FkJ/kg*KOerstedsmicrohm-cm
7.992500-25500.50≤1.0274

4. Chemical Composition of SS316/ SS316L

ASTM A312 TP316L seamless pipes, 3/4" SCH40.

ASTM A312 TP316L seamless pipes, 3/4″ SCH40.

ElementSS316SS316L
Carbon≤0.08≤0.03
Manganese≤2.00≤2.00
Phosphorus≤0.045≤0.045
Sulfur≤0.030≤0.030
Silicon≤0.75≤0.75
Chromium16.00-18.0016.00-18.00
Nickel10.00-14.0010.00-14.00
Molybdenum2.00-3.002.00-3.00
Nitrogen≤0.10≤0.10
IronBalanceBalance

5. Mechanical Properties of SS316/ SS316L

ASTM A403 Gr. WP316L butt welding fittings with sandblasting or mirror finish surface.

ASTM A403 Gr. WP316L butt welding fittings with sandblasting or mirror finish surface.

GradesTensile Strength ksi(Mpa), min.Yield Strength, ksi(Mpa)Elongation, %Hardness, Rockwell
SS31684(579)42(290)50B79
SS316L81(558)42(290)50B79

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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