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Material







Alloys 316 UNS S31600 and 316L UNS S31603 are molybdenum-bearing austenitic stainless steel, which are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steel such as 304. These alloys also offer higher creep, stress-to-rupture, and tensile strength at elevated temperature. In addition to excellent corrosion resistance and strength properties, the Alloys 316 and 316L Cr-Ni-Mo alloys also provide excellent fabricability and formability which are typical of the austenitic stainless steel.

316 is improved version of 304, with the addition of molybdenum and higher nickel content. The resultant composition of 316 gives the steel much increased corrosion resistance in aggressive environment. Molybdenum make the steel more resistant to pitting and crevice corrosion in chloride-contaminated media, sea water and acetic acid vapour. The lower rate of general corrosion in mildly corrosive environment give the steel good atmospheric corrosion resistance in polluted marine atmosphere.

316 offers higher strength and better creep resistance at higher temperature than 304. 316 also possesses excellent mechanical properties and corrosion properties at sub-zero temperatures. When there is a danger of corrosion in the heat affected zones of weldments, the low-carbon variety 316L should be used. 316Ti, the titanium-stabilised version, is used for its resistance to sensitization during prolonged exposure in the 550oC-800oC temperature range.

What does the L mean?

L-grades have 0.03% carbon maximum. L-grades are resistant to sensitization in short-term exposures or heat treatments. L-grade often have slightly lower (typically 5,000 psi less) minimum strengths than standard stainless steel.



General Properties
Chemical Composition
Resistance to Corrosion
Physical Properties
Mechanical Properties
Oxidation Resistance
Heat Treatment
Fabrication
Comparison Grade 316 316L 316Ti

Difference Between Duplex Steel S31803/S32205 and 316L
Comparison of Composition Ranges of TP316 Stainless Steel
Selection 316L Stainless Steel for High Purity Semiconductor Gas Filter Assemblies




Specifications: UNS S31600 / S31603

Applications:
  • Food preparation equipment, especially in chloride environments
  • Chemical processing, equipment
  • Laboratory benches and equipment
  • Rubber, plastics, pulp & paper machinery
  • Pollution control equipment
  • Boat fittings, value and pump trim
  • Heat exchanger
  • Pharmaceutical and textile industry
  • Condensers, evaporators and tanks
Standards:
  • ASTM/ASME: UNS S31600 / S31603
  • EURONORM: X1 CrNiMo 17 12 2 / X3 CrNiMo 17 12 2
  • AFNOR: Z 6 CND 17-11 / Z 2 CND 17-12
  • DIN: 1.4401 / 1.4404
Product Information for 316/316L/316H stainless steel tubing
  Sizes   Standard Tolerances
Products OD Wall Lengths and/or coils Grades OD Wall Lengths
Seamless Austenitic Steel Boiler, Super Heater, Heat-Exchangers & Condenser Tubes

Specifications: ASTM-A249, ASME-SA249, ASTM-A688, ASME-SA688

3/16" (4.76 mm) to 4" (101.6 mm)

Metric sizes available

0.020" (0.51 mm) to 0.220" (5.59 mm) Random or cut lengths up to 90' (27.4 m)

Coils to 1-1/2" OD

316/316L
Under 1" (25.4 mm) ±0.004" (0.10 mm)
1" (25.4 mm) to 1-1/2" (38.1 mm) ±0.006" (0.15 mm)
>1-1/2" (38.1 mm) to 2" (50.8 mm) ±0.008" (0.20 mm)
>2" (50.8 mm) to 2-1/2" (63.5 mm) ±0.010" (0.25 mm)
>2-1/2" (63.5 mm) to 3" (76.2 mm) ±0.012" (0.30 mm)
3" (76.2 mm) to 4" (101.6 mm) ±0.015" (0.38 mm)
±10%
Randoms up to +2" (50.8 mm)

Cuts +1/8" (3 mm) -0"

Coils to 80,000' (24,384 m)

Pressure & Corrosion Stainless steel Tube

Meets or exceeds requirements for welded

Specifications: ASTM-A269, ASTM-A1016, and ASTM-A632

1/16" (1.59 mm) to 4" (101.6 mm)

Metric sizes available

0.010" (0.25 mm) to 0.220" (5.59 mm) Random or cut lengths up to 90' (27.4 m)

Coils to 1-1/2" OD

316/316L
<1-1/2" (38.1 mm) ±0.005" (0.13 mm) 1-1/2" (38.1 mm) to 3" (76.2 mm) ±0.010" (0.25 mm)
3-1/2" (88.9 mm) to 4" (101.6 mm) ±0.015" (0.38 mm)
±10% Randoms up to +2" (50.8 mm)
Cuts +1/8" (3 mm) -0"
Coils to 80,000' (24,384 m)
Beverage Tubing 1/4"(6.35 mm) 5/16" (7.94 mm) 3/8" (9.53 mm) 1/2" (12.7 mm)

Metric sizes available

0.020" (0.51 mm) to 0.028" (0.71 mm) Random or cut lengths up to 40' (12.2 m) 316L ±0.005" (0.13 mm) ±10% Randoms up to +2" (50.8 mm)

Cuts +1/8" (3 mm) -0"

Coils to 15,000' (4,572 m)

Instrumentation Tubing

Specifications: ASTM-A269 and ASTM-A632

1/16" (1.59 mm) to 1/2" (12.7 mm)

Metric sizes available

0.010" (0.25 mm) to 0.065" (1.65 mm) Random or cut lengths up to 40' (12.2 m) 316/316L ±0.005" (0.13 mm) ±10% Randoms up to +2" (50.8 mm)

Cuts +1/8" (3 mm) -0"

Food/Dairy Tubing, Pharmaceutical/ BioPharmaceutical Tubing, High Purity Tubing, Ultra High Purity Tubing 1/2" (12.7 mm) to 8" (203.2 mm) 0.049" (1.24 mm) to 0.109" (2.77 mm) 20' (6.1 m) stock lengths.

Other lengths available upon request.

316/316L
1/2" (12.7 mm) ± 0.005" (0.13 mm)
3/4" (19.1 mm) ± 0.005" (0.13 mm)
1" (25.4 mm) ± 0.005" (0.13 mm)
1-1/2" (38.1 mm) ± 0.008" (0.20 mm)
2" (50.8 mm) ± 0.008" (0.20 mm)
2-1/2" (63.5 mm) ± 0.010" (0.25 mm)
3" (76.2 mm) ± 0.010" (0.25 mm)
4" (101.6 mm) ± 0.015" (0.38 mm)
6" (152.4 mm) ± 0.030" (0.76 mm)
8" (203.2 mm) +0.061" (1.55 mm), -0.031" (0.79 mm)
±10%

±10%

±10%

±10%

±10%

±10%

±10%

±10%

±10%

±10%
+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1/8" (3 mm) -0"

+1" (25.4 mm) -0"

+1" (25.4 mm) -0"

Physical Properties of 316/316L/316H Alloys in the Annealed Condition at -20°F to +100°F

      Tensile Strength Yield Strength            
Alloy UNS Spec. psi MPa ksi psi MPa ksi Elongation in 2 inches (min.) % Grain Size Req. Max. Hardness Modulus of Elasticity (x106 psi) Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) Thermal Conductivity
(BTU-in/ft2-h-°F)
316 S31600 A249, A312 75,000 515 75 30,000 205 30 35 90 Rb 28.0 9.2 116
316L S31603 A270, A312 70,000 485 70 25,000 170 25 90 Rb 28.0 9.2 116
316H S31609 7 or coarser

Composition of 316/316L/316H tubing and pipe

Grade 316 316L
UNS Designation S31600 S31603
Carbon (C) Max. 0.08 0.030*
Manganese (Mn) Max. 2.00 2.00
Phosphorous (P) Max. 0.045 0.045
Sulphur (S) Max. 0.030 0.030
Silicon (Si) Max. 1.00 1.00
Chromium (Cr) 16.0 – 18.0 16.0 – 18.0
Nickel (Ni) 10.0 – 14.0 10.0 – 14.0
Molybdenum (Mo) 2.0 – 3.0 2.0 – 3.0
Nitrogen (N)
Iron (Fe) Bal. Bal.
Other Elements

* Maximum carbon content of 0.04% acceptable for drawn tubes

316/316L/316H Product Range

Alloy UNS Designation Werkstoff NR. Specifications*
316 S31600 1.4401 A269, A/SA249, A/SA312, A1016, A632, A/SA688
316L** S31603 1.4404 A269, A/SA249, A/SA312, A1016, A632, A/SA688

*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.

**Available with electropolished ID's for ultra purity applications.


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