Stainless Steel 316H Seamless Pipes & Tubes
SS 316H (UNS S31609) is the high-carbon version of 316, with carbon controlled to 0.04-0.10%. It combines the molybdenum-enhanced corrosion resistance of 316 with superior creep strength at elevated temperatures (425-816C). This makes it the preferred choice for high-temperature service in corrosive environments where both properties are essential.
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 (% by weight)
| C | Mn | Si | Cr | Ni | Mo | P | S |
|---|---|---|---|---|---|---|---|
| 0.04-0.10 | 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 (Minimum at Room Temperature)
| Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| 515 MPa min | 205 MPa min | 35% min | 95 HRB max |
Physical Properties - SS 316H
| 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 316H
| Property | Value |
|---|---|
| Pitting Resistance (PREN) | ~24 |
| Max Service Temp (Oxidizing) | 870 C (continuous) |
| Intergranular Corrosion | Susceptible if sensitized (higher carbon) |
| Stress Corrosion Cracking | Better than 304H 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 |
|---|---|---|---|
| TP316H | SUS 316HTB | 316S51 | 08Kh17N13M2T |
SS 316H vs Comparable Grades
| Grade | UNS | Tensile | Yield | PREN | Max Temp |
|---|---|---|---|---|---|
| SS 316 / 316LAustenitic Stainless Steel | S31600 | 515 / 485 MPa min | 205 / 170 MPa min | ~24 | 870 C |
| SS 304HAustenitic Stainless Steel | S30409 | 515 MPa min | 205 MPa min | ~18 | 870 C (continuous) |
| SS 317LAustenitic Stainless Steel | S31703 | 515 MPa min | 205 MPa min | ~29 | 870 C |
Applicable Standards
Applications
Key Advantages of SS 316H
SS 316H Applications by Region
Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait)
Used in refinery furnace tubes and offshore high-temperature equipment across UAE, Saudi Arabia, and Qatar where chloride corrosion is also a concern.
Europe (Germany, UK, Norway, Netherlands, Italy)
Specified for power plant and petrochemical high-temperature applications in Germany, UK, and Scandinavia.
United States
Used in power generation and petrochemical industries where both high-temp strength and corrosion resistance are needed.
Frequently Asked Questions about SS 316H 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
Ready to Order SS 316H Seamless Pipes?
Stancor is India's leading manufacturer of SS 316H seamless pipes, exporting to UAE, Saudi Arabia, Qatar, Germany, UK, and USA. Contact our sales team for competitive pricing, fast delivery, and full material certification.