SS 347 & 347H Socket Weld Fittings Manufacturer in India
Forged ASTM A182 / ASME SA182 fittings engineered for high-temperature, corrosion-critical piping systems — in stock across Class 2000, 3000, 6000 & 9000.
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Stainless steel 347 and 347H socket weld fittings are the preferred solution for piping systems that must perform at extreme operating temperatures while maintaining resistance to intergranular corrosion. Aashish Metal & Alloys, SS 347/347H socket weld fittings manufacturer & supplier in India, is providing precision manufactured elbows, tees, unions, crosses, couplings and caps per ASTM A182, ASME SA182 and ANSI B16.11 standards. This austenitic chromium-nickel alloy is stabilized with columbium (niobium) to prevent precipitation of these carbides and sensitization, and therefore suitable for use in the temperature range from 800°F to 1650°F where ordinary 304/316 grades are not suitable. All fittings undergo both destructive and non-destructive testing and are subject to dimensional verification and leak testing to assure dimensional accuracy, weld integrity and durability. From 1/8” NB to 4” NB we stock 3000, 6000 and 9000 fittings and our forging partners and technical expertise ensures delivery on time and full mill documentation for all consignment. Collaborate with Aashish Metal & Alloys for fittings engineered for performance and with authentic industry know-how.
- Stainless Steel 347 / 347H Socket Weld Fittings Specifications
- SS 347 / 347H Socket Weld Fittings Equivalent International Grades
- Stainless Steel 347 / 347H Socket Weld Fittings Chemical Composition (% Weight)
- Mechanical Properties of Stainless Steel 347 / 347H Socket Weld Fittings
- Related Types Of Stainless Steel 347 / 347H Socket Weld Fittings
- ASTM A182 SS 347 / 347H Socket Weld Forged Fittings Size Range & Dimensions
- SS 347 / 347H Socket Weld Fittings Class, Size & Wall Thickness
- Stainless Steel 347 / 347H Socket Weld Fittings Quality and Test Reports
- We Supply a Variety of SS 347 / 347H Socket Weld Fittings
- Socket Weld Fitting Dimensions — Class 3000
- Applications & Industries Served
- SS 347 vs SS 347H: What's the Difference?
- FAQs - SS 347 & 347H Socket Weld Fittings
What Are SS 347 / 347H Socket Weld Fittings?
Stainless steel 347 (UNS S34700) and its higher-carbon counterpart 347H (UNS S34709) belong to the family of columbium (niobium) stabilized austenitic chromium-nickel steels. Unlike standard 304 or 316 grades, the controlled addition of columbium and tantalum locks carbon inside the grain structure rather than at the grain boundaries. This stabilization mechanism prevents chromium carbide precipitation, protecting the fitting against intergranular corrosion even after repeated heating and cooling cycles between 800°F (427°C) and 1650°F (899°C).
Both grades are non-magnetic, fully austenitic, and weld without the carbide-precipitation issues that affect unstabilized stainless steels. SS 347H carries a slightly higher minimum carbon content (0.04%–0.10% versus 0.08% max in standard 347), which improves creep strength and makes it the preferred choice for sustained service above 1000°F — typical of refinery heaters, superheater headers, and high-pressure steam lines.
Common SS 347 / 347H Socket Weld Fitting Types We Manufacture (H3)
- 90° & 45° Socket Weld Elbow
- Equal & Unequal Socket Weld Tee
- Socket Weld Cross
- Socket Weld Union
- Full & Half Socket Weld Coupling
- Socket Weld Cap & Plug
- Socket Weld Reducer Insert & Bushing
- Sockolet, Elbolet, Thredolet, Weldolet, Nipolet (branch outlets)
- Socket Weld Boss & Hexagon Nipple
Stainless Steel 347 / 347H Socket Weld Fittings Specifications
| Specification | Details |
|---|---|
| Governing Material Standard | ASTM A182 / ASME SA182 |
| Dimensional Standard | ASME B16.11, MSS SP-79, SP-83, SP-95, SP-97, BS 3799 |
| Size Range | 1/8″ NB to 4″ NB |
| Pressure Class | 2000 LBS / 3000 LBS / 6000 LBS / 9000 LBS |
| End Connection | Socket Weld (Screwed/Threaded NPT & BSP also available) |
| Common Fitting Types | Elbow, Tee, Cross, Union, Coupling, Cap, Plug, Bushing, Swage Nipple, Boss, Hex Nipple |
| Surface Finish | Pickled & passivated, bright finish, or as specified |
| Manufacturing Method | Hot forged, CNC machined, solution annealed |
SS 347 / 347H Socket Weld Fittings Equivalent International Grades
| Grade | UNS No. | Werkstoff Nr. | JIS | GOST | EN |
|---|---|---|---|---|---|
| SS 347 | S34700 | 1.4550 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
| SS 347H | S34709 | 1.4961 | SUS 347H | – | X6CrNiNb18-12 |
Stainless Steel 347 / 347H Socket Weld Fittings Chemical Composition (% Weight)
| Grade | C | Mn | Si | P | S | Cr | Ni | Cb (Nb) | Fe |
|---|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.0–20.0 | 9.0–13.0 | 10×C min – 1.10 max | Balance |
| SS 347H | 0.04–0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.0–19.0 | 9.0–13.0 | 8×C min – 1.10 max | Balance |
Mechanical Properties of Stainless Steel 347 / 347H Socket Weld Fittings
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | ~1400–1425°C — confirm one sourced value and apply it to both the Threaded and Socket Weld pages |
| Tensile Strength | 75,000 PSI min (515 MPa) |
| Yield Strength (0.2% Offset) | 30,000 PSI min (205 MPa) |
| Elongation | 35% min |
| Magnetic Behaviour | Non-magnetic (austenitic) |
We Supplied a Comprehensive Range Of 347 / 347H Stainless Steel Socket Weld Fittings
Related Types Of Stainless Steel 347 / 347H Socket Weld Fittings
SS 347 / 347H Socket weld Elbow
SS 347 / 347H Socket weld Tee
SS 347 / 347H Socket weld Full Coupling
SS 347 / 347H Socket weld Half Coupling
SS 347 / 347H Socket weld Cross
SS 347 / 347H Socket weld Union
SS 347 / 347H Socket weld Pipe Cap
SS 347 / 347H Socket weld Boss
ASTM A182 SS 347 / 347H Soketweld Forged Fittings Size Range & Dimensions
| DN-NPT | MAJOR DIAMETER MM | TAPPING /DRILL SIZE MM | TPI | PITCH MM |
|---|---|---|---|---|
| 1/16″ | 7.895 | 6.00 | 27 | 0.941 |
| 1/8″ | 10.242 | 8.25 | 27 | 0.941 |
| 1/4″ | 13.616 | 10.70 | 18 | 1.411 |
| 3/8″ | 17.055 | 14.10 | 18 | 1.411 |
| 1/2″ | 21.223 | 17.40 | 14 | 1.814 |
| 3/4″ | 26.568 | 22.60 | 14 | 1.814 |
| 1″ | 33.228 | 28.50 | 11.5 | 2.209 |
| 1¼” | 41.985 | 37.00 | 11.5 | 2.209 |
| 1½” | 48.054 | 43.50 | 11.5 | 2.209 |
| 2″ | 60.092 | 55.00 | 11.5 | 2.209 |
| 2½” | 72.699 | 65.50 | 8 | 3.175 |
| 3″ | 88.608 | 81.50 | 8 | 3.175 |
| 3½” | 101.316 | 94.30 | 8 | 3.175 |
| 4″ | 113.973 | 107.00 | 8 | 3.175 |
| 5″ | 141.300 | 134.384 | 8 | 3.175 |
| 6″ | 168.275 | 161.191 | 8 | 3.175 |
| 8″ | 219.075 | 211.673 | 8 | 3.175 |
| 10″ | 273.050 | 265.311 | 8 | 3.175 |
| 12″ | 323.850 | 315.793 | 8 | 3.175 |
SS 347 / 347H Socket weld Fittings Class, Size & Wall Thickness
| Description | Class Designation | ||
|---|---|---|---|
| 3000 | 6000 | 9000 | |
| Elbows 45 and 90 degrees, Tees, Crosses, Couplings, Half-Couplings, End or Pipe Caps |
1/2 – 4 | 1/2 – 2 | 1/2 – 2 |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| 1/2 – 4 | 1/2 – 2 | 1/2 – 2 | |
| Pipe Size by Wall Thickness |
SCH 80 / XS | SCH 160 | XXS |
We Keep Bulk Stock Of 347 , 347H Stainless Steel Forged Socket Weld Fittings At Our Stockyard, Contact Us For Free Sample & Stock List.
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
For Stainless Steel 347 / 347H Socket Weld Fittings price list
Request the latest Stainless Steel 347 Socket Weld Fittings List. Please click on the request a quote button or click here to request the updated price list and ready stock information along with your requirement. Aashish Metal & Alloys maintains a stock of all standard items and can export them at best price for 347H Stainless Steel Socket Weld Fittings .
We supply of variety SS 347 / 347H Socket Weld Fittings
Aashish Metal & Alloys is a Highly Acclaimed Manufacturer & suppliers of Stainless Steel 347 / 347H Socket weld Forged Fittings offering all varieties in all types of 347 Stainless Steel in all sizes, with more then 52 countries worldwide.
| Stainless Steel 347 Socket weld Fittings | Stainless Steel 347H Forged Socket Weld Fittings |
| SS 347 High Pressure Socket weld Fittings | Stainless Steel 347H Socket weld 45 deg. Elbow |
| UNS S34700 Socket weld Fittings | Stainless Steel 347H Forged Socket weld Tee |
| SS 347 Socket Weld 45 Deg Elbow Suppliers | SS 347H 90 Degree Socket weld Elbow |
| SS 347 Socket weld End Cap Dealer | SS 347H Socket weld Half Coupling Exporter |
| 347 SS Socket Weld Tee Stockholder | SS 347H Socket Weld Reducing Tee Distributors |
| SS 347 Socket weld Equal Cross | ANSI B16.11 SS 347H Socket weld Pipe Cap |
| UNS S34709 Socket weld Unequal Cross | SS 347 High Pressure Socket weld Fittings Manufacturer |
| 347H Stainless Steel Socket weld Coupling | SS 347 Socket weld Reducing Couplings |
| DIN 1.4550 Forged Socket weld Tee | DIN 1.4961 Socket weld Equal Cross |
| Stainless Steel 347 Socket weld Full Coupling | Stainless 347 Forged Socket weld Union |
| SS 347 Socket weld Equal Tee | SS 347H Socket Weld Half Coupling Stockist |
| ASTM A182 Stainless Steel 347 Socket Weld Boss | ASME SA182 SS 347H Socket weld Pipe Cap |
Socket Weld Fitting Dimensions — Class 3000
| DN | NPS | Center-to-End ‘A’ (mm) | O.D. of Band ‘H’ (mm) | Min. Wall Thickness ‘G’ (mm) |
|---|---|---|---|---|
| 6 | 1/8″ | 21 | 22 | 3.18 |
| 15 | 1/2″ | 33 | 38 | 3.18 |
| 25 | 1″ | 44 | 56 | 3.68 |
| 50 | 2″ | 64 | 86 | 4.27 |
| 100 | 4″ | 114 | 152 | 6.55 |
Applications & Industries Served
- Oil, gas & petrochemical refining units
- Chemical and fertilizer processing plants
- Power generation — boilers, superheaters & steam headers
- Pulp, paper & textile processing industries
- Food, beverage & pharmaceutical processing lines
- Marine, offshore & shipbuilding piping systems
- Heat exchangers, furnaces & high-temperature process equipment
SS 347 vs SS 347H: What’s the Difference?
| Parameter | SS 347 | SS 347H |
|---|---|---|
| Carbon Content | 0.08% max | 0.04% – 0.10% |
| UNS Designation | S34700 | S34709 |
| High-Temp Creep Strength | Good | Superior |
| Recommended Service Temp. | Up to ~1000°F | Sustained service above 1000°F |
| ASTM Grade Designation | A182 Grade F347 | A182 Grade F347H |
| Typical Application | General corrosion-resistant piping | Refinery heaters, superheaters, high-pressure steam lines |
Our Manufacturing Process & Quality Control
- Raw material procurement with full mill traceability and chemical verification
- Hot forging (closed-die) to near-net shape for superior grain flow and strength
- Precision CNC machining to ANSI B16.11 / MSS SP dimensional tolerances
- Solution annealing heat treatment to stabilize the microstructure
- Surface treatment — pickling and passivation for corrosion protection
- 100% dimensional inspection against approved drawings
- Mechanical and metallurgical testing — tensile, hardness, bend, impact
- Non-destructive testing — ultrasonic, radiography, dye penetrant, magnetic particle, eddy current
- Permanent marking for grade, heat number & traceability
- Export-grade packing with anti-corrosion coating and full documentation
Certifications & Standards Compliance
- ISO 9001:2015 certified quality management system
- Manufactured strictly to ASTM A182 / ASME SA182
- Dimensions per ASME B16.11, MSS SP-79/83/95/97 & BS 3799
- Third-Party Inspection (TPI) coordination available — SGS, Bureau Veritas, TÜV, Lloyd’s Register
- PMI (Positive Material Identification) testing on request
- Mill Test Certificates issued as per EN 10204 Type 3.1 / 3.2
Global Reach & Export Supply
From our manufacturing base in India, Aashish Metal & Alloys ships SS 347/347H socket weld fittings to fabricators, EPC contractors, and trading houses across the Middle East, Southeast Asia, Europe, Africa, and the Americas. Every export consignment is packed to withstand long-haul transit and accompanied by complete quality documentation, so your project timelines stay on track regardless of destination.
Our Related Products
Export Country
MIDDLE EAST Saudi Arabia | AFRICA Nigeria NORTH AMERICA Usa | EUROPE Russia | ASIA India SOUTH AMERICA Argentina |
FAQs - SS 347 & 347H Socket Weld Fittings
The core difference lies in carbon content. SS 347 contains a maximum of 0.08% carbon, while SS 347H is controlled between 0.04% and 0.10% carbon. This higher, controlled carbon range gives 347H better creep strength and load-bearing capacity at sustained high temperatures, making it the preferred grade for refinery and power-plant applications above 1000°F.
SS 347/347H socket weld fittings are manufactured to ASTM A182 / ASME SA182 material specifications, with dimensions conforming to ASME B16.11, MSS SP-79/83/95/97, and BS 3799 standards.
Aashish Metal & Alloys manufactures SS 347/347H socket weld fittings from 1/8″ NB to 4″ NB, available in Class 2000, 3000, 6000, and 9000 LBS pressure ratings to suit a wide range of piping pressure requirements.
Yes. Both grades are stabilized with columbium to resist carbide precipitation, allowing reliable performance between 800°F and 1650°F. SS 347H, with its higher carbon content, offers additional creep strength for sustained high-temperature, high-pressure service.
No. SS 347 and 347H are fully austenitic stainless steel grades and are therefore non-magnetic, even after cold working or welding.
These fittings are widely used in oil & gas refining, petrochemical and fertilizer plants, power generation boilers and superheaters, pulp & paper processing, pharmaceutical manufacturing, and marine or offshore piping systems where corrosion resistance at elevated temperature is critical.
For More Information About Stainless Steel 347 / 347H Socket Weld Fittings please call +91-22-66362223 / 66394926 or send an email to export@aashishmetal.com
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