Girgaon, Mumbai - 400004
Stainless Steel 310H Welded Pipe is an austenitic stainless steel pipe manufactured by forming stainless steel strip or plate into a tubular section and joining the longitudinal seam by welding. The grade contains high chromium and nickel levels, providing strong oxidation and scaling resistance for elevated-temperature environments.
The higher carbon level of 310H is controlled to provide improved high-temperature strength and creep resistance compared with conventional 310 grades. This makes Stainless Steel 310H suitable for selected high-temperature process systems, furnace equipment, heat-treatment equipment and industrial heating applications.
Kamal Steels is a Stainless Steel 310H Welded Pipe Manufacturer and Stockist in India, based in Mumbai. The company supplies 310H welded pipes in different sizes, schedules, wall thicknesses, lengths and surface finishes according to customer and project requirements.
The commonly specified pressure-piping designation is ASTM A312 TP310H / ASME SA312 TP310H, with UNS designation S31009. Pipes can be supplied with applicable testing, inspection and material documentation according to project requirements.
Stainless Steel 310H Welded Pipe is a high-carbon austenitic stainless steel pipe developed for elevated-temperature service. Its high chromium and nickel content provides excellent resistance to oxidation and scaling, while the controlled higher carbon content supports higher-temperature strength compared with standard 310 grades.
ASTM A312 TP310H is commonly specified for Stainless Steel 310H Pipe used in high-temperature pressure and process applications. Welded pipes are available in different nominal sizes, schedules, wall thicknesses, lengths, end preparations and surface finishes according to applicable ASTM, ASME and project requirements.
| Specification | Details |
|---|---|
| Product | Stainless Steel 310H Welded Pipe |
| Grade | 310H / Type 310H |
| UNS Number | S31009 |
| ASTM Specification | ASTM A312 |
| ASME Specification | ASME SA312 |
| Material Type | High-Carbon Austenitic Stainless Steel |
| Pipe Type | Welded |
| Manufacturing Process | Formed Stainless Steel Strip / Plate with Welded Seam |
| Nominal Size | 1/8 NB to 48 NB and as required |
| Schedules | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160, XXS and others |
| Length | Single Random, Double Random and Cut Length |
| End Preparation | Plain End, Bevelled End, Threaded End and as required |
| Surface Finish | Annealed & Pickled, Mill Finish, Bright Annealed and Polished |
| Testing | Hydrostatic, Ultrasonic, PMI, Dimensional Inspection and other specified tests |
| Material Certificate | EN 10204 3.1 Certificate available as required |
Kamal Steels supplies Stainless Steel 310H Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths. Testing, inspection, material certification and export packaging can be provided according to applicable standards and customer requirements.
The chemical composition of Stainless Steel 310H provides its high- temperature mechanical performance and oxidation resistance. Its chromium and nickel content supports resistance to oxidation and scaling, while the controlled carbon content is important for elevated-temperature strength.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04–0.10 |
| Manganese (Mn) | 2.00 max. |
| Silicon (Si) | 1.50 max. |
| Phosphorus (P) | 0.045 max. |
| Sulfur (S) | 0.030 max. |
| Chromium (Cr) | 24.0–26.0 |
| Nickel (Ni) | 19.0–22.0 |
| Iron (Fe) | Balance |
The controlled carbon range distinguishes 310H from the lower-carbon 310S grade and is intended to provide improved high-temperature strength. The actual chemical composition should be verified against the applicable material specification and material test certificate.
Stainless Steel 310H Welded Pipes are supplied in different nominal pipe sizes, outside diameters and wall thicknesses for high-temperature process and industrial applications. The required dimensions are selected according to pipe size, operating pressure, service temperature, design code and project specifications.
Common schedules include SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 and XXS, subject to pipe size and availability. Heavier schedules provide greater nominal wall thickness and may be selected where additional pressure or mechanical capacity is required.
| Nominal Pipe Size | Outside Diameter | Common Schedules |
|---|---|---|
| 1/8 NB | 10.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/4 NB | 13.7 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1/2 NB | 21.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 NB | 33.4 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 1 1/2 NB | 48.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 2 NB | 60.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 3 NB | 88.9 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 4 NB | 114.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S |
| 6 NB | 168.3 mm | SCH 5S, SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 8 NB | 219.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 10 NB | 273.1 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 12 NB | 323.9 mm | SCH 10S, SCH 40S, SCH 80S, SCH 160 |
| 14 NB | 355.6 mm | SCH 10S, SCH 40S, SCH 80S |
| 16 NB | 406.4 mm | SCH 10S, SCH 40, SCH 80 |
| 18 NB | 457.2 mm | SCH 10S, SCH 40, SCH 80 |
| 20 NB | 508.0 mm | SCH 10S, SCH 40, SCH 80 |
| 24 NB | 610.0 mm | SCH 10S, SCH 40, SCH 80 |
Kamal Steels supplies Stainless Steel 310H Welded Pipes in standard and custom sizes, schedules, wall thicknesses and lengths according to applicable standards, customer drawings and project specifications.
ASTM A312 TP310H Welded Pipes are manufactured with controlled dimensional requirements for outside diameter, wall thickness, length and applicable pipe dimensions. Dimensional accuracy is important for pipe fabrication, welding, fit-up and installation.
| Parameter | Requirement |
|---|---|
| Outside Diameter | Controlled according to applicable ASTM A312 dimensional requirements and specified pipe size. |
| Wall Thickness | Controlled according to specified nominal thickness and applicable standard requirements. |
| Length | Available in standard random, double random or specified cut lengths. |
| Ovality | Controlled to maintain acceptable pipe roundness and dimensional consistency. |
| End Preparation | Plain, bevelled or other specified end preparation. |
Dimensional inspection can be performed to verify outside diameter, wall thickness, length and other applicable requirements. Additional inspection and testing may be specified for critical applications.
The pressure rating of Stainless Steel 310H Welded Pipe depends on outside diameter, wall thickness, operating temperature, allowable material stress and the applicable piping design code. Since 310H is intended for elevated-temperature service, pressure design must account for the actual operating temperature.
| Factor | Effect on Pressure Design |
|---|---|
| Pipe Size | Outside diameter is considered during pressure design calculations. |
| Wall Thickness | A greater wall thickness generally provides higher pressure capacity. |
| Pipe Schedule | Different schedules provide different nominal wall thicknesses. |
| Operating Temperature | Allowable material stress changes with service temperature. |
| Design Code | The applicable piping code determines the pressure design method. |
| Corrosion Allowance | Additional wall thickness may be required for corrosion or erosion. |
The maximum allowable working pressure should be established using the actual design pressure, temperature, pipe dimensions, material properties and applicable engineering code. A generic pressure value should not be used as the final design basis.
Stainless Steel 310H is identified by different designations under international material standards. These designations help engineers, manufacturers and procurement teams identify the corresponding material during international sourcing.
| Standard | 310H Designation |
|---|---|
| ASTM | 310H |
| ASME | SA312 TP310H |
| UNS | S31009 |
| EN | 1.4845 / grade equivalent subject to specification |
Equivalent material designations should be verified against chemical composition, mechanical properties, heat treatment, manufacturing requirements and applicable project standards before material substitution.
The surface finish of Stainless Steel 310H Welded Pipe is selected according to the application, manufacturing process and required surface condition. High-temperature industrial piping generally uses standard mill or annealed and pickled finishes, while specialized applications may require brighter or polished surfaces.
| Surface Finish | Description | Typical Application |
|---|---|---|
| Annealed & Pickled | Heat-treated and chemically cleaned surface. | Industrial process piping |
| Mill Finish | Standard surface obtained during manufacturing. | General industrial applications |
| Bright Annealed | Bright and smooth surface produced by controlled annealing. | Specialized process applications |
| Polished | Mechanically finished surface with improved smoothness. | Specialized applications |
The required finish should be specified according to the operating environment, cleaning requirements, fabrication process and final use. Kamal Steels can supply Stainless Steel 310H Welded Pipes with specified surface conditions according to customer and project requirements.
Stainless Steel 310H Welded Pipes are used primarily in high-temperature applications where oxidation resistance, scaling resistance and high-temperature mechanical strength are important.
| Application | Typical Use |
|---|---|
| Furnace Equipment | High-temperature furnace piping and components |
| Heat Treatment | Heat-treatment systems and high-temperature process lines |
| Petrochemical | Elevated-temperature process systems |
| Chemical Processing | High-temperature process piping and equipment |
| Power Generation | Selected high-temperature piping systems |
| Industrial Heating | Heating and combustion-related equipment |
| Process Plants | High-temperature process and utility piping |
The suitability of Stainless Steel 310H should be evaluated according to the actual operating temperature, pressure, atmosphere, corrosion conditions and applicable design requirements.
Stainless Steel 310H Welded Pipes are used across industries where high-temperature resistance, oxidation resistance and elevated-temperature mechanical performance are required.
| Industry | Typical Use |
|---|---|
| Power Generation | High-temperature piping and process systems |
| Petrochemical | Elevated-temperature process piping |
| Chemical Processing | High-temperature chemical process systems |
| Oil & Gas | Selected process and heat-related piping applications |
| Heat Treatment | Furnaces and high-temperature process equipment |
| Industrial Manufacturing | High-temperature equipment and fabricated piping |
| Engineering & Fabrication | Industrial high-temperature piping systems |
Kamal Steels supplies Stainless Steel 310H Welded Pipes from India for domestic and international industrial requirements. Pipes can be supplied in different sizes, schedules, wall thicknesses, lengths, finishes, testing conditions and material documentation according to project requirements.
Stainless Steel 310H Welded Pipe is a high-carbon austenitic stainless steel pipe designed for elevated temperature service. It offers excellent creep strength, oxidation resistance, and long-term durability.
SS 310H has a higher carbon content than standard SS 310, providing improved high-temperature strength and creep resistance for prolonged service at elevated temperatures.
Our Stainless Steel 310H Welded Pipes are manufactured according to ASTM A312, ASTM A358, ASME SA312, ASTM A778, and ASME B36.19M standards.
We supply SS 310H Welded Pipes from 1/8" NB to 24" NB in multiple schedules, wall thicknesses, and customized lengths.
These pipes are widely used in furnaces, boilers, heat exchangers, refineries, petrochemical plants, power plants, cement plants, and chemical processing industries.
Yes. SS 310H is specifically designed for continuous high-temperature applications where superior creep resistance and oxidation resistance are required.
Every pipe undergoes Hydrostatic Testing, PMI, Radiographic Testing, Dimensional Inspection, Visual Inspection, and other quality tests before delivery.
Yes. All Stainless Steel 310H Welded Pipes are supplied with EN 10204 3.1 Mill Test Certificates, and third-party inspection is available upon request.
Yes. We offer customized diameters, wall thicknesses, schedules, lengths, end preparations, and surface finishes according to project requirements.
Kamal Steels offers premium-quality SS 310H Welded Pipes with certified materials, competitive prices, ready stock, strict quality control, prompt delivery, and reliable export services worldwide.