Stainless Steel 316 / 316L Seamless Pipes & Tubes
SS 316 / 316L (UNS S31600 / S31603) are molybdenum-bearing austenitic stainless steels with 2-3% Mo, providing significantly improved resistance to pitting and crevice corrosion in chloride environments. 316L is the low-carbon variant (C: 0.030% max) preferred for welded fabrication, eliminating the risk of intergranular corrosion.
Size Range
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness
SCH 5S to SCH 160, XXS
Standards
4 specs
Chemical Composition Comparison (% by weight)
SS 316 S31600
SS 316L S31603
| Grade | C | Mn | Si | Cr | Ni | Mo | P | S |
|---|---|---|---|---|---|---|---|---|
| SS 316S31600 | 0.08 max | 2.00 max | 0.75 max | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.045 max | 0.030 max |
| SS 316LS31603 | 0.030 max | 2.00 max | 0.75 max | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.045 max | 0.030 max |
Mechanical Properties Comparison
SS 316
SS 316L
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| SS 316 | 515 MPa min | 205 MPa min | 35% min | 95 HRB max |
| SS 316L | 485 MPa min | 170 MPa min | 35% min | 95 HRB max |
Physical Properties - SS 316 / 316L
| Density | Melting Range | Thermal Conductivity | Electrical Resistivity | Specific Heat | Coeff. of Thermal Expansion |
|---|---|---|---|---|---|
| 7.98 g/cm3 | 1375-1400 C | 16.3 W/m-K | 740 nOhm-m | 500 J/kg-K | 15.9 um/m-C |
Corrosion Resistance - SS 316 / 316L
| Property | Value |
|---|---|
| Pitting Resistance (PREN) | ~24 |
| Max Service Temp (Oxidizing) | 870 C |
| Intergranular Corrosion | 316: Susceptible if sensitized / 316L: Resistant (low carbon) |
| Stress Corrosion Cracking | Better than 304 in chlorides |
| General Corrosion Rate | <0.05 mm/yr in most acids |
| Seawater Resistance | Moderate - better than 304 |
Equivalent International Grades
| ASTM | JIS | BS | GOST |
|---|---|---|---|
| TP316 / TP316L | SUS 316 / SUS 316L | 316S31 / 316S11 | 08Kh17N13M2 / 03Kh17N14M2 |
SS 316 / 316L vs Comparable Grades
| Grade | UNS | Tensile | Yield | PREN | Max Temp |
|---|---|---|---|---|---|
| SS 304 / 304LAustenitic Stainless Steel | S30400 | 515 / 485 MPa min | 205 / 170 MPa min | ~18 | 870 C |
| SS 317LAustenitic Stainless Steel | S31703 | 515 MPa min | 205 MPa min | ~29 | 870 C |
| SS 316HAustenitic Stainless Steel | S31609 | 515 MPa min | 205 MPa min | ~24 | 870 C (continuous) |
Applicable Standards
Applications
Key Advantages of SS 316 / 316L
SS 316 / 316L Applications by Region
Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait)
Premium grade for offshore platforms, desalination plants, and petrochemical facilities across UAE, Saudi Arabia, Qatar, and Oman. 316L specified by ADNOC, Saudi Aramco, and QatarEnergy.
Europe (Germany, UK, Norway, Netherlands, Italy)
Specified for marine, pharmaceutical, chemical, and offshore applications in UK, Norway, Germany, and Netherlands. NORSOK approved.
United States
Most widely specified Mo-bearing grade for pharmaceutical, chemical, and offshore piping in the United States.
Frequently Asked Questions about SS 316 / 316L Seamless Pipes
Quick Specifications
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
SCH 5S to SCH 160, XXS
Industries Served
Related Grades
Compare With
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