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Stainless Steel 310S Fittings Manufacturer and Exporter
Stainless Steel 310S Fittings are fittings that are made of austenitic high-temperature stainless steel, which are used to make pipes that are used for high-temperature environments and have a strong resistance to oxidation. The low carbon version of grade 310S contains less carbide precipitation during welding and enhances weldability and fabrication properties. The Stainless Steel 310S Fittings are made from 24% to 26% chromium along with 19% to 22% nickel. These alloys give very good resistance to scaling and oxidation at continuous temperatures of up to 1100 °C. The minimum tensile strength and yield strength for Stainless Steel 310S Fittings are 515 Mpa and 205 Mpa respectively, suitable for high pressure and high temperature industrial applications. Stainless Steel 310S Fittings consist of less carbon than SS 310 Fittings, thus being less vulnerable to corrosion post welding. ASTM A403 WP310S Buttweld Fittings have extensive applications in the petrochemical plants, furnaces, heat exchangers, boilers, thermal processing units, refineries and power generation industries where they must meet the demands of high-temperature use. Solitaire Overseas is a well-known manufacturer and supplier of high quality Stainless Steel 310S Fittings, precision engineered to meet international quality and dimension standards for industrial piping systems.
Table of Content
- Specification Chart of Stainless Steel 310S Fittings
- Chemical Composition of Stainless Steel 310S Fittings
- Types of SS 310S Fittings
- Mechanical Properties of Stainless Steel 310S Fittings
- Equivalent Grades of SS 310 Stainless Steel Fittings
- Application and Industrial Uses of Stainless Steel 310S Fittings
- Frequently Asked Questions
Specification Chart of Stainless Steel 310S Fittings
| Parameter | Details |
|---|---|
| Grade | Stainless Steel 310S / S31008 |
| DIN / Werkstoff Nr. | 1.4845 |
| EN Designation | X8CrNi25-21 |
| Buttweld Standard | ASTM A403 WP310S |
| Forged Standard | ASTM A182 F310S (forged) |
| ASME Equivalent | ASME SA403 WP310S / SA182 F310S |
| Dimension Standard (BW) | ASME B16.9 / MSS SP-43 |
| Dimension Standard (Forged) | ASME B16.11 / MSS SP-79 |
| Forms | Elbow, Tee, Reducer, Cap, Stub End, Lap Joint, Cross, Coupling, Half-Coupling, Union, Plug, Bushing, Insert |
| Size Range (BW) | 1/2" NB to 48" NB |
| Size Range (Forged) | 1/8" NPS to 4" NPS, Class 2000 / 3000 / 6000 / 9000 |
| Schedule Range | SCH 5S / 10S / 40S / 80S / 160 / XXS |
| End Types | Beveled End (BE), Plain End (PE), Threaded End (TE) |
| Test Certificates | EN 10204 3.1 MTC (standard); 3.2 on request |
| Third-Party Inspection | SGS / TÜV / Bureau Veritas / Intertek (on request) |
| PMI Testing | Available on request |
| Surface Finish | Pickled, Annealed, Polished (2B, No.4, Mirror) on request |
| Origin | India / Japan / Europe (to be confirmed at order stage) |
| Delivery | Ready stock for common sizes; custom: 4–8 weeks |
Chemical Composition of Stainless Steel 310S Fittings
| Grade | C (Carbon) | Mn (Manganese) | Si (Silicon) | P (Phosphorus) | S (Sulfur) | Cr (Chromium) | Mo (Molybdenum) | Ni (Nickel) | N (Nitrogen) |
|---|---|---|---|---|---|---|---|---|---|
| SS 310 | 0.25 max | 2 max | 0.015 max | 0.020 max | 0.015 max | 24.00 - 26.00 | 0.10 max | 19.00 - 21.00 | 54.7 min |
| SS 310S | 0.08 max | 2 max | 1.00 max | 0.045 max | 0.030 max | 24.00 - 26.00 | 0.75 max | 19.00 - 21.00 | 53.095 min |
Types of SS 310S Fittings
SS 310 Butt weld Cross
SS 310 Butt weld Elbow
SS 310S Butt weld Tee
SS 310S Pipe Bend
SS 310S Reducer
SS 310S Stub End
Mechanical Properties of Stainless Steel 310S Fittings
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1402 °C (2555 °F) |
| Tensile Strength | 75,000 Psi (515 MPa) |
| Yield Strength (0.2% Offset) | 30,000 Psi (205 MPa) |
| Elongation | 40 % |
Equivalent Grades of SS 310 Stainless Steel Fittings
| Grade | Werkstoff Nr. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SS 310 | 1.4841 | S31000 | SUS 310 | 310S24 | 20Ch25N20S2 | - | X15CrNi25-20 |
| SS 310S | 1.4845 | S31008 | SUS 310S | 310S16 | 20Ch23N18 | - | X8CrNi25-21 |
Application and Industrial Uses of Stainless Steel 310S Fittings
- Petrochemical Processing Plants
- Oil and Gas Industries
- Chemical Processing Plants
- Power Generation Stations
- Heat Exchangers and Condensers
- Boiler and Superheater Systems
- Industrial Furnace Components
- Thermal Processing Equipment
- Refineries and Process Piping
- Cement and Kiln Industries
Frequently Asked Questions
SS 310S has a maximum carbon of 0.08% compared to 0.25% for SS 310. The reduced carbon in 310S provides better weldability and lower risk of sensitization. For welded assemblies in high-temperature service, 310S is the recommended choice. Standard 310 is available for non-welded components where slightly higher strength may be beneficial.
SS 310S fittings can operate continuously up to 1100°C (2000°F) in oxidizing conditions. In cyclic service (thermal shock), the effective temperature should be assessed by a metallurgist.
Solitaire Overseas supplies SS 310S buttweld fittings (elbows, tees, reducers, caps, stub ends) to ASME B16.9, and forged socket weld and threaded fittings to ASME B16.11. Confirm specific item availability at time of enquiry.
No. SS 314 (UNS S31400) has higher silicon content (1.5–3.0%) for improved carburizing resistance, while 310S has silicon limited to 1.5% max. For carburizing furnace applications, 314 may be specified over 310S.
Yes. All SS 310S fittings are supplied with EN 10204 3.1 mill test certificates. Third-party inspection by SGS, Bureau Veritas, TÜV or Intertek is available on request.
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