Forged Fittings
High-pressure forged socket-weld and threaded fittings to ASME B16.11 — elbows, tees, couplings, unions, plugs and more — in Class 2000 to 9000 across carbon, alloy, stainless, duplex and nickel grades.
Choose a forged fitting
Socket-weld and threaded types by class and grade. Each links to its detail and enquiry.
Technical specification
| Parameter | Specification |
|---|---|
| Product | Forged socket-weld & threaded fittings |
| Dimensional standard | ASME B16.11; NPT threads to ASME B1.20.1 |
| Classes | SW 3000 / 6000 / 9000 · Thd 2000 / 3000 / 6000 |
| Size range | 1/8" – 4" NPS (per type & class) |
| Material specifications | ASTM A105/A105N, A350, A182, B564, B462 |
| Sour service | NACE MR0175 / ISO 15156 where specified |
| Documentation | EN 10204 3.1 / 3.2, PMI, TPI |
How it is made
Forgings are open- or closed-die forged from bar or billet, then heat treated to the grade requirement — carbon A105 as-forged or normalised; low-temp A350 normalised (and tempered) with Charpy testing; Cr-Mo A182 F-grades normalised & tempered; austenitic stainless solution annealed; duplex solution annealed and rapidly cooled. Socket-weld and threaded fittings are machined to ASME B16.11 (NPT threads to ASME B1.20.1); Class denotes a pressure-temperature rating basis, not a pressure in psi.
Grades & materials
The grades below are the verified scope for this family, with representative chemistry; availability by grade, class and size is confirmed on quotation. Exact grade, class and condition are confirmed per order.
| Material family | Grades | UNS | Standard | Service |
|---|---|---|---|---|
| Carbon steel | A105 / A105N | K03504 | ASME B16.11 / ASTM A105 | General service |
| Low-temp carbon | A350 LF2 Cl.1, LF3, LF6 | — | ASTM A350 | Low temperature |
| Cr-Mo alloy | A182 F1, F11, F12, F22, F5, F9, F91, F92 | — | ASTM A182 | High-temperature |
| Austenitic stainless | A182 F304/304L/304H, F316/316L/316H, F321, F347, F317L, F44 (6Mo) | — | ASTM A182 | Corrosion / high temp |
| Duplex / super duplex | A182 F51 (S31803), F60 (S32205), F53 (S32750), F55 (S32760) | — | ASTM A182 | Chloride / sour |
| Nickel alloys | B564 N06600 (600), N06625 (625), N04400 (Monel), N10276 (C-276), N08825 (825) | — | ASTM B564 | Severe corrosion |
| Alloy 20 | B462 N08020 | N08020 | ASTM B462 | Sulphuric acid |
Chemical composition (representative)
| Grade | C | Mn | Si | Cr | Ni | Mo | Other |
|---|---|---|---|---|---|---|---|
| A105 | 0.35 max | 0.60–1.05 | 0.10–0.35 | 0.30 max | 0.40 max | 0.12 max | Cu 0.40 max |
| A350 LF2 | 0.30 max | 0.60–1.35 | 0.15–0.30 | 0.30 max | 0.40 max | 0.12 max | — |
| A182 F11 Cl.2 | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | 1.00–1.50 | — | 0.44–0.65 | — |
| A182 F22 Cl.3 | 0.05–0.15 | 0.30–0.60 | 0.50 max | 2.00–2.50 | — | 0.87–1.13 | — |
| A182 F91 | 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | 8.0–9.5 | 0.40 max | 0.85–1.05 | V 0.18–0.25, Nb 0.06–0.10, N 0.03–0.07 |
| A182 F304L | 0.030 max | 2.00 max | 1.00 max | 18.0–20.0 | 8.0–13.0 | — | — |
| A182 F316L | 0.030 max | 2.00 max | 1.00 max | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 | — |
| A182 F51 (S31803) | 0.030 max | 2.00 max | 1.00 max | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | N 0.08–0.20 |
| A182 F53 (S32750) | 0.030 max | 1.20 max | 0.80 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | N 0.24–0.32 |
| A182 F44 (6Mo) | 0.020 max | 1.00 max | 0.80 max | 19.5–20.5 | 17.5–18.5 | 6.0–6.5 | N 0.18–0.25, Cu 0.5–1.0 |
| B564 625 | 0.10 max | 0.50 max | 0.50 max | 20.0–23.0 | 58.0 min | 8.0–10.0 | Nb 3.15–4.15 |
| B462 Alloy 20 | 0.07 max | 2.00 max | 1.00 max | 19.0–21.0 | 32.0–38.0 | 2.0–3.0 | Cu 3.0–4.0, Nb 8×C–1.0 |
Standards & specifications
Product standards
- ASME B16.11 forged socket-weld & threaded fittings
- ASME B1.20.1 NPT threads (form & gauging)
- MSS SP-83 Class 3000 / 6000 unions · SP-79 reducer inserts
- MSS SP-95 swage nipples & bull plugs · SP-97 reinforced outlets
Material & service
- ASTM A105/A350 carbon & low-temp forgings
- ASTM A182 alloy, stainless & duplex forgings
- ASTM B564/B462 nickel & Alloy 20
- NACE MR0175 / ISO 15156 sour service
Mechanical properties (representative grades)
Representative grades — full MTC values on request. Values are ASTM/ASME specification minima or ranges at room temperature.
| Grade | Type | Tensile (MPa) | Yield min (MPa) | Elong min (%) |
|---|---|---|---|---|
| A105 / A105N | Carbon | 485 | 250 | 22 |
| A350 LF2 Cl.1 | Low-temp C (−46 °C) | 485–655 | 250 | 22 |
| A350 LF3 | 3½Ni (−101 °C) | 485–655 | 260 | 22 |
| A350 LF6 Cl.1 | Low-temp C-Mn | 440 min | 250 | 22 |
| A182 F1 | C-½Mo | 485 | 275 | 22 |
| A182 F11 Cl.2 | 1¼Cr-½Mo | 515 | 310 | 20 |
| A182 F12 Cl.2 | 1Cr-½Mo | 485 | 275 | 20 |
| A182 F22 Cl.3 | 2¼Cr-1Mo | 515 | 310 | 18 |
| A182 F5 | 5Cr-½Mo | 485 | 275 | 20 |
| A182 F9 | 9Cr-1Mo | 620 | 380 | 20 |
| A182 F91 | 9Cr-1Mo-V | 585 | 415 | 20 |
| A182 F92 | 9Cr-2W | 620 | 440 | 20 |
| A182 F304 / F304H | Austenitic SS | 515 | 205 | 30 |
| A182 F304L | Austenitic SS | 485 | 170 | 30 |
| A182 F316 / F316H | Austenitic SS | 515 | 205 | 30 |
| A182 F316L | Austenitic SS | 485 | 170 | 30 |
| A182 F317L | Austenitic SS | 515 | 205 | 35 |
| A182 F321 | Austenitic SS | 515 | 205 | 30 |
| A182 F347 | Austenitic SS | 515 | 205 | 30 |
| A182 F44 (6Mo) | Super-austenitic | 650 | 300 | 35 |
| A182 F51 (S31803) | Duplex | 620 | 450 | 25 |
| A182 F60 (S32205) | Duplex | 655 | 485 | 25 |
| A182 F53 (S32750) | Super duplex | 795 | 550 | 15 |
| A182 F55 (S32760) | Super duplex | 750 | 550 | 25 |
| B564 N06600 (600) | Ni-Cr | 550 | 240 | 30 |
| B564 N06625 (625) | Ni-Cr-Mo | 760 | 345 | 30 |
| B564 N04400 (Monel 400) | Ni-Cu | 480 | 170 | 35 |
| B564 N10276 (C-276) | Ni-Mo-Cr | 690 | 283 | 40 |
| B564 N08825 (825) | Ni-Fe-Cr | 585 | 235 | 30 |
| B462 N08020 (Alloy 20) | Ni-Fe-Cr-Mo | 551 | 241 | 30 |
Testing, inspection & documentation
| Test / document | Detail |
|---|---|
| Chemical / PMI | Product-analysis chemistry; PMI on alloy, stainless & nickel grades |
| Tensile | Tensile, yield and elongation per grade (ASTM A370) |
| Impact (Charpy) | A350 LF2/LF3/LF6 at the grade test temperature; and where specified |
| Hardness | Brinell/Rockwell; NACE MR0175 hardness for sour service (e.g. F22 ≤ 22 HRC) |
| Corrosion | IGC per ASTM A262 (austenitic); ferrite / phase check (duplex) |
| NDE | UT / MPI / DPT as specified; 100 % visual and dimensional |
| Certification | EN 10204 3.1 as standard; 3.2 with third-party endorsement |
Applications & industries served
Available forms, sizes & range
Standard forms and the supply range for this family. Exact size, wall and grade are confirmed per order.
| Parameter | Range |
|---|---|
| Classes | 2000 / 3000 / 6000 / 9000 |
| Size range | 1/8" – 4" NPS |
Frequently asked questions
What pressure classes are forged fittings available in?
Threaded fittings are Class 2000, 3000 and 6000; socket-weld fittings are Class 3000, 6000 and 9000, per ASME B16.11. Class is a designation, not a pressure in psi — the actual permitted pressure depends on the material, temperature, size, governing code and installation. Not every class exists for every fitting type and NPS.
Does the schedule “equivalence” give the fitting bore or the pressure rating?
Neither directly. B16.11 gives a pipe-wall correlation used to calculate ratings; it is not the actual fitting bore, and it is not a pressure rating on its own. Threaded Class 6000 has its own correlation and does not simply inherit the socket-weld Class 6000 (Sch 160) value, so the correct figure is taken from the ordered edition for the specific end type and class.
Is A105N a different grade from A105?
No — A105N is A105 supplied in the normalized heat-treatment condition, not a separate chemistry grade. We state the actual condition and the applicable heat-treatment requirements rather than treating “A105N” as its own grade.
Is A182 F44 a duplex stainless?
No. F44 (UNS S31254) is a 6% molybdenum super-austenitic stainless, not a duplex, so it is listed under high-alloy austenitic stainless. The duplex / super-duplex grades are separate — and F51 (S31803) vs F60 (S32205), and F53 (S32750) vs F55 (S32760), are distinct designations that do not automatically dual-certify.
Which MSS standards apply to inserts, swage nipples and unions?
MSS SP-79 covers socket-welding reducer inserts; MSS SP-95 covers swage nipples and bull plugs (not bushings / plugs); and MSS SP-83 covers Class 3000 / 6000 unions. Integrally reinforced branch outlets are MSS SP-97, added only where actually supplied. The exact edition, class, ends, size and materials are confirmed per order.
Are NPT and BSP threads interchangeable?
No. NPT (ASME B1.20.1) and BSP (BSPT / BSPP) are different thread forms with different sealing arrangements and are not interchangeable. BSP is supplied on request against its own governing standard, with the exact designation and sealing method specified; standard NPT compliance is kept separate from custom thread products.
What information is needed for a quotation?
Provide the fitting type, all end sizes, the class, socket-weld or thread form, the material grade / class / condition, the standard and edition, service and design conditions, required tests and certification, quantity and any drawing. Availability by grade, class and size is confirmed with the quotation.
Request a quote
Send your requirement to Sagiant Piping Industries and our team responds with grade, material selection, availability and pricing for forged fittings. Attach a BOQ, line list or drawing for a faster, more accurate quotation.
- Fast RFQ response with grade & material-selection support
- EN 10204 3.1 / 3.2 certification, PMI & third-party inspection
- BOQ & line-list project supply — India & export
Mechanical & chemical values shown are ASTM/ASME specification figures; certified heat-specific values appear on the MTC. Availability is confirmed with the quotation.
