Titanium Pipes, Fittings & Flanges Supplier
Overview
Sagiant Piping Industries supports enquiries for titanium pipes, tubes, fittings, flanges, bar and plate — the commercially pure (CP) grades, the palladium/ruthenium corrosion-resistant grades, and the higher-strength alpha-beta alloys — for desalination, seawater, chemical, marine and, where separately qualified, aerospace and medical work. Titanium is not one continuous "Grade 1-to-N" family: CP, corrosion-resistant and alloy grades have different chemistry, strength and interstitial controls, and no single row covers every product form and condition. Grade, product form, condition, testing and certification are confirmed with the quotation; availability is not implied for every grade or size.
Titanium grades, chemistry, standards and RFQ reference data
CP and alloy titanium grades by product form and condition, with interstitial-controlled chemistry, mechanical, corrosion and dimensional references. Values carry a basis label (specification / producer / nominal); because full current licensed standards were not available, confirm the adopted ASTM edition, grade, product form and condition on the material certificate.
Technical Specification
| Parameter | Specification |
|---|---|
| Product Forms | Seamless & welded pipe, condenser/heat-exchanger tube, BW & forged fittings, flanges, forgings, bar/billet, sheet/plate |
| Grades | CP Grades 1, 2, 3, 4; corrosion-resistant Grades 7, 11, 12; alloy Grades 5 (Ti-6Al-4V), 9 (Ti-3Al-2.5V), 23 (Ti-6Al-4V ELI). Additional Pd/Ru and beta grades reviewed against actual supply. |
| Size Range | Pipe by NPS; tube by OD × wall; bar and plate per product form — confirmed with quotation |
| Wall / Schedule / Class | Pipe wall per adopted dimensional standard; tube by OD × wall; flanges B16.5 (material rating verified separately) |
| Standards | ASTM B861 (seamless pipe), B862 (welded pipe), B338 (tube), B363 (fittings), B381 (forgings/flanges), B348 (bar), B265 (plate/sheet); medical F67 / F136 where offered |
| Testing & Docs | Chemistry incl. O/N/C/H (laboratory), tensile, hardness where specified, hydro/NDE, contamination/surface checks, MTC EN 10204 3.1/3.2 — coordinated per scope |
Chemical Composition (wt %, maxima unless a range)
| Grade | UNS | N | C | H | Fe | O | Al | V | Other |
|---|---|---|---|---|---|---|---|---|---|
| Commercially pure (CP) | |||||||||
| Grade 1 | R50250 | 0.03 | 0.08 | 0.015 | 0.20 | 0.18 | — | — | Ti balance |
| Grade 2 | R50400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | — | — | Ti balance |
| Grade 3 | R50550 | 0.05 | 0.08 | 0.015 | 0.30 | 0.35 | — | — | Ti balance |
| Grade 4 | R50700 | 0.05 | 0.08 | 0.015 | 0.50 | 0.40 | — | — | Ti balance |
| Corrosion-resistant (Pd / Mo-Ni) | |||||||||
| Grade 7 | R52400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | — | — | Pd 0.12–0.25 |
| Grade 11 | R52250 | 0.03 | 0.08 | 0.015 | 0.20 | 0.18 | — | — | Pd 0.12–0.25 (Grade 1 + Pd) |
| Grade 12 | R53400 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | — | — | Mo 0.2–0.4, Ni 0.6–0.9 |
| Alloy grades | |||||||||
| Grade 9 (Ti-3Al-2.5V) | R56320 | 0.03 | 0.08 | 0.015 | 0.25 | 0.15 | 2.5–3.5 | 2.0–3.0 | near-alpha |
| Grade 5 (Ti-6Al-4V) | R56400 | 0.05 | 0.08 | 0.015 | 0.40 | 0.20 | 5.5–6.75 | 3.5–4.5 | alpha-beta |
| Grade 23 (6Al-4V ELI) | R56401 | 0.03 | 0.08 | 0.0125 | 0.25 | 0.13 | 5.5–6.5 | 3.5–4.5 | extra-low interstitial |
Interstitial elements (O, N, C, H) control titanium properties and are shown for every grade. Values are specification maxima (a range where two limits apply); a dash means "not specified", never zero. Residual each/total limits, heat vs product analysis and footnotes need the adopted edition. Grade 23 is the extra-low-interstitial (ELI) version of Grade 5 — lower O/Fe for toughness; industrial Grade 23 is not the same as F136-certified implant material. Final chemistry (including O/N/H by laboratory analysis, not handheld PMI) is confirmed on the heat-wise MTC.
Grade Directory — Family, UNS & Related Designations
| Grade | Family | UNS | EN (comparison only) | Character & typical use |
|---|---|---|---|---|
| Grade 1 | CP | R50250 | 3.7025 | Softest, most ductile CP; deep drawing, anodes, plate-frame exchangers. |
| Grade 2 | CP | R50400 | 3.7035 | Workhorse CP grade; desalination, chemical and marine piping/tube. |
| Grade 3 | CP | R50550 | 3.7055 | Higher-strength CP for pressure parts. |
| Grade 4 | CP | R50700 | 3.7065 | Highest-strength CP grade; higher-load corrosion service. |
| Grade 7 | CP + Pd | R52400 | 3.7235 | Grade 2 + palladium for reducing acids and crevice corrosion. |
| Grade 11 | CP + Pd | R52250 | 3.7225 | Grade 1 + palladium; maximum ductility with enhanced corrosion resistance. |
| Grade 12 | Ti-Mo-Ni | R53400 | 3.7105 | Enhanced crevice-corrosion resistance at elevated temperature. |
| Grade 9 | near-alpha alloy | R56320 | 3.7195 | Medium-strength Ti-3Al-2.5V; hydraulic/aerospace tubing. |
| Grade 5 | alpha-beta alloy | R56400 | 3.7165 | Widely used high-strength Ti-6Al-4V; aerospace, fasteners, high-load parts. |
| Grade 23 | alpha-beta ELI | R56401 | — | Ti-6Al-4V ELI; higher toughness. Implant use needs F136 certification, not just this grade name. |
EN/Werkstoff numbers are related designations for comparison, not exact replacements; aerospace vs industrial Ti-6Al-4V, and Grade 5 vs Grade 23, are not automatically interchangeable. Product designation varies by form (e.g. B381 F-grade for forgings, B363 designation for fittings). ASTM B381-26 alone lists 39 forging grades — the full offered set is confirmed against each adopted pipe/tube/plate/bar standard, not assumed from one specification.
Mechanical Properties (annealed, specified minima)
| Grade | Tensile min MPa | 0.2% yield MPa | Elong. min % | Hardness (ref.) | Basis |
|---|---|---|---|---|---|
| Grade 1 | 240 | 170–310 | 24 | ≈120 HV (typ.) | B265 / B338 annealed |
| Grade 2 | 345 | 275–450 | 20 | ≈160 HV (typ.) | B338 tube / B265 |
| Grade 3 | 450 | 380–550 | 18 | ≈180 HV (typ.) | B265 / B338 |
| Grade 4 | 550 | 480–655 | 15 | — | B265 / B338 |
| Grade 7 | 345 | 275–450 | 20 | ≈160 HV (typ.) | B265 / B338 |
| Grade 11 | 240 | 170–310 | 24 | ≈120 HV (typ.) | B265 / B338 |
| Grade 12 | 483 | 345 min | 18 | — | B265 / B338 |
| Grade 9 | 620 | 483 min | 15 | ≈24 HRC (typ.) | B338 / B861 annealed |
| Grade 5 | 895 | 828 min | 10 | ≈36 HRC (typ.) | B348 bar / annealed |
| Grade 23 | 860 | 795 min | 10 | — | B348 / B265 annealed |
Specified minima for annealed product on the stated basis — not "solution-annealed" for every grade and not universal across all forms, sizes and conditions. CP yield is a range (min–max); alloy yield is a minimum. Hardness figures are typical/reference, not verified acceptance limits (do not convert scales as exact equivalents). Grade 2 tube minima (345/275/20% in 2") are producer-confirmed for that form; do not reuse a single row for forging, plate or bolting. Elongation depends on specimen, gauge and orientation; reduction-of-area applies to some bar products.
Physical Properties (representative)
| Property | CP titanium | Ti-6Al-4V (Gr 5/23) | Basis |
|---|---|---|---|
| Density | ≈ 4.51 g/cm³ | ≈ 4.43 g/cm³ | weight-estimation reference |
| Elastic modulus (ambient) | ≈ 105 GPa | ≈ 114 GPa | room-temperature reference |
| Magnetic response | Essentially non-magnetic | — | |
| Thermal expansion / conductivity vs temperature | Grade- and temperature-dependent — use a producer dataset | withheld: not verified per grade | |
Representative reference values, not acceptance limits. Titanium's low density gives a high specific strength, but the mass saving is a design outcome: Ti-6Al-4V is about 43.6% lighter than steel by equal volume (4.43 vs 7.85 g/cm³), not "half the weight". Beta transus and melting range, if quoted, are process references, not service-temperature ratings.
Standards & Product Forms
| Product | Material / product specification | Separate dimensional / other basis |
|---|---|---|
| Seamless pipe | ASTM B861 (grade, condition) — not the legacy B337 | NPS/OD/wall per adopted dimensional standard; tolerances |
| Welded pipe | ASTM B862 | Weld/manufacturing treatment, examination, dimensions |
| Condenser / heat-exchanger tube | ASTM B338 (tube, not pipe) | OD × min/nominal wall, process, condition, tests |
| Wrought fittings | ASTM B363 (fitting designation) | ASME B16.9; route, heat treatment, examination |
| Forgings & flanges | ASTM B381 (F-grade) | B16.5 dimensions; pressure–temperature basis justified separately |
| Bar / billet | ASTM B348 (grade, condition, section) | Diameter/section, orientation, acceptance tests |
| Sheet / strip / plate | ASTM B265 (grade, thickness, condition) | Finish, flatness, tolerances |
| Fasteners | ASTM F467 (nuts) / F468 (bolts, studs) as applicable | Alloy, size-dependent tests, thread dimensions |
| Castings / medical | B367 (castings); F67 (CP) / F136 (6Al-4V ELI) / F1472 (6Al-4V) medical | Independent grade/property record; device qualification separate |
B338 is a tube specification, not pipe; use B861/B862 for pipe. ASTM B337 is a legacy/superseded pipe specification — do not use it as the current default. A titanium flange with B16.5 dimensions does not automatically have a validated B16.5 material pressure–temperature rating — the design/rating basis must be documented. Raw-material certification does not itself qualify a finished medical device.
Corrosion & Service Selection
| Environment | Guidance |
|---|---|
| Seawater / desalination | Strong general corrosion resistance under appropriate conditions — but consider hot crevices, deposits, chemistry, flow and galvanic interfaces. Not blanket "immunity". |
| Chemical / acids | Selection depends on concentration, temperature, aeration/oxidants, impurities and flow. Grades 7/11/12 and Pd/Ru grades help in reducing acids but are not universal acid-proof options. |
| Chlorine | Distinguish wet from dry chlorine — titanium performs well in wet chlorine but can react severely in dry chlorine. Fluoride/HF conditions can attack the passive film. |
| Hydrogen | Hydrogen absorption and hydride formation are a risk under reducing conditions and cathodic charging/protection — avoid blanket immunity claims. |
| Galvanic | Titanium's noble passive potential can accelerate corrosion of coupled less-noble metals; use joint design/isolation where required. |
| Temperature | No universal 300°C (CP) / 400°C (Gr 5) ceiling — code allowable stress, creep/oxidation, corrosion, exposure and condition govern. A brochure application range is not a pressure-design limit. |
Welding, Forming & Fabrication
| Item | Guidance |
|---|---|
| Shielding | Titanium is highly reactive when hot — inert shielding of the weld face, root and hot trailing region, with purity/moisture control, is essential. Clean joints and suitable filler with qualified WPS/PQR/personnel. |
| Weld acceptance | Weld colour can screen shielding problems (silver/straw good; blue/grey/white poor) but is not a complete acceptance test — internal contamination may not show on the surface. |
| Forming / heat treatment | Grade/condition-specific bend limits and springback; stress relief or anneal as required; control surface contamination and alpha-case. |
| Machining / fasteners | Manage heat removal, workholding, tooling and galling; use thread lubrication; handle chips/dust appropriately for a reactive metal. |
Applications, Industries & Grade Guidance
| Duty | Grades commonly considered | Selection notes |
|---|---|---|
| Seawater / desalination piping & tube | Grade 2 (Gr 7/12 for crevices) | Condition, temperature, crevice/deposit control |
| Reducing-acid chemical service | Grade 7, 11, 12 | Concentration, temperature, impurities — not universal acid-proof |
| Condensers / heat exchangers | Grade 2 tube (B338) | OD × wall, tube tests — not pipe |
| High-strength structural / aerospace | Grade 5, 9, 23 | Form/condition, AMS/customer spec where required |
| Medical / implant | Grade 23 ELI (F136), CP (F67) | Implant certification & device qualification, not just a grade name |
Candidate grades for enquiry — not substitutions or approvals. Aerospace and medical use need qualification and traceability beyond ASTM industrial compliance.
Available Forms, Sizes & Dimensions
Supplied as seamless and welded pipe, condenser/heat-exchanger tube, butt weld and forged fittings, flanges, bar/billet and sheet/plate. Share grade, product form, NPS/OD, schedule or wall and standard for confirmation. For dimensional data see the Pipe Schedule Chart (a geometry reference; titanium is not a stainless-steel material).
| Form | Size Range | Wall / Thickness | Standard |
|---|---|---|---|
| Seamless pipe | 1/8" – 12" NPS | per adopted schedule | ASTM B861 |
| Welded pipe | 1/2" – 24" NPS | per class | ASTM B862 |
| Tube | 6 – 50 mm OD | 0.5 – 3 mm wall | ASTM B338 |
| BW fittings | 1/2" – 24" | Sch / grade | ASME B16.9 / B363 |
| Bar | 5 – 250 mm | annealed | ASTM B348 |
| Sheet / plate | — | 1 – 80 mm | ASTM B265 |
Dimensional coverage is standard-based; the confirmed supply range is stated with the quotation. Pipe (NPS/schedule, B861/B862) and tube (OD × wall, B338) are not interchangeable. Whether B36.19 or another dimensional system is adopted is set by the product/order — geometry does not make titanium a stainless-steel grade.
Frequently Asked Questions
What is the difference between Grade 2 and Grade 5?
Grade 2 is commercially pure titanium — highly corrosion resistant and formable, moderate strength. Grade 5 (Ti-6Al-4V) is a high-strength alpha-beta alloy for structural and aerospace loads, but with different fabrication and (usually) higher cost. Neither is "the strongest titanium"; other alloys and conditions can exceed Grade 5.
When should Grade 7 or Grade 11 be used instead of CP titanium?
Grades 7 and 11 add palladium to Grade 2 and Grade 1 respectively for markedly better resistance to reducing acids and crevice corrosion, where plain CP titanium is marginal. Selection still depends on the specific acid, concentration and temperature.
Is titanium immune to seawater and all chlorine environments?
No. It resists seawater and wet chlorine very well under appropriate conditions, but hot crevices, deposits, dry chlorine, HF/fluorides, reducing acids and cathodic hydrogen charging are real limitations. Qualify the actual environment.
What is the difference between B338 tube, B861 and B862 pipe?
B338 covers seamless/welded tube for condensers and heat exchangers (ordered by OD × wall). B861 covers seamless pipe and B862 covers welded pipe (ordered by NPS/schedule). They are not interchangeable.
Product Range
The titanium range can be supplied with related pipes, tubes, butt weld fittings, forged fittings, flanges, bar and plate where required by the BOQ.
Applications
For dimensional references, see the Pipe Schedule & Fittings Guide. For related supply, review Pipes & Tubes, Butt Weld Fittings, Forged Fittings and Flanges. For corrosion-resistant alternatives, see High Nickel Alloys.
Types of Products
| Type | Description |
|---|---|
| Pipes & Tubes | B861/B862 pipe and B338 condenser/heat-exchanger tube |
| Fittings | B363 butt weld and B381 forged fittings |
| Flanges | B381 F-grade forged flanges |
| Bar / Plate | B348 bar and B265 sheet/plate, subject to grade and project availability |
Available Forms
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Frequently Asked Questions
How do CP Grades 1–4 differ in strength and formability?
All four are commercially pure titanium; strength rises and ductility falls from Grade 1 to Grade 4 as controlled oxygen and iron increase (Grade 1 is softest and most formable, Grade 4 the strongest CP grade). Corrosion resistance is broadly similar; the choice is driven by required strength versus forming.
What is the difference between Grade 2 and Grade 5?
Grade 2 is commercially pure titanium — highly corrosion resistant and formable at moderate strength. Grade 5 (Ti-6Al-4V) is a high-strength alpha-beta alloy for structural and aerospace loads, with different fabrication behaviour. Grade 5 is not "the strongest titanium"; other alloys and conditions can exceed it.
When should Grade 7 or Grade 11 be considered instead of CP titanium?
Grades 7 and 11 add palladium to Grade 2 and Grade 1 respectively, giving markedly better resistance to reducing acids and crevice corrosion where plain CP titanium is marginal. Selection still depends on the specific acid, concentration and temperature.
How do Grade 5 and Grade 23 ELI differ, and what does implant certification require?
Grade 23 is the extra-low-interstitial version of Ti-6Al-4V, with lower oxygen and iron for improved toughness. Implant use is defined by ASTM F136 (and device standards), not by the grade name alone — industrial Grade 23 material is not automatically implant-certified.
What is the difference between B338 tube, B861 pipe and B862 pipe?
B338 covers seamless and welded titanium tube for condensers and heat exchangers, ordered by OD × wall. B861 covers seamless pipe and B862 covers welded pipe, ordered by NPS/schedule. They are separate specifications and not interchangeable.
Is titanium immune to seawater or all chlorine environments?
No. Titanium resists seawater and wet chlorine very well under appropriate conditions, but hot crevices, deposits, dry chlorine, HF/fluorides, strong reducing acids and cathodic hydrogen charging are genuine limitations. The actual environment must be assessed.
Which information is needed to assess titanium in an acid service?
The acid type and concentration, temperature, aeration/oxidants, impurities and flow, plus the grade and condition. Palladium grades (7/11) and Grade 12 extend resistance in reducing acids, but no titanium grade is universally acid-proof.
Can handheld PMI verify oxygen, nitrogen and hydrogen limits?
No. Ordinary handheld XRF cannot measure the interstitial elements (O, N, C, H) that govern titanium properties. Rely on laboratory certificate analysis for those elements and on the material test certificate for grade compliance.
Why does titanium welding require trailing and root shielding?
Hot titanium reacts rapidly with air, so the weld face, root and the hot trailing region all need inert shielding with controlled purity and moisture. Weld colour can screen shielding problems but is not a complete acceptance test, since internal contamination may not show on the surface.
Does a B16.5-dimensional titanium flange have a verified pressure rating?
Not automatically. Matching B16.5 dimensions does not establish a B16.5 material pressure–temperature rating for titanium. The material, design code and rating calculation must be documented for the actual grade and service.
Does titanium need post-weld heat treatment or a maximum service temperature?
There is no single answer. Stress relief or annealing is applied per grade, condition and code where required — not a universal recipe — and any maximum temperature depends on code allowable stress, creep/oxidation, corrosion and exposure, not a fixed 300°C/400°C ceiling.
What should a titanium RFQ contain?
State the grade and product form, standard and edition, condition, dimensions (NPS/schedule for pipe, OD × wall for tube), quantity, service environment, required testing (including interstitial analysis and NDE), inspection document and destination, plus any aerospace or medical certification. Availability and scope are confirmed with the quotation.
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