$Titanium Forged Bar for Flange Making \| Gr2/Gr5 (TC4) Flange Billet, ASTM B348/B381 Route, UT-Ready$

$Titanium Forged Bar for Flange Making \| Gr2/Gr5 (TC4) Flange Billet, ASTM B348/B381 Route, UT-Ready$

Titanium Forged Bar for Flange Making \| Gr2/Gr5 (TC4) Flange Billet, ASTM B348/B381 Route, UT-Ready

Спецификация	titanium forged bar for flange making, titanium flange billet Gr2 Gr5 TC4, ASTM B348 forged bar B381 flange, titanium forged round bar flange blank Baoji, forged Ti-6Al-4V flange stock, titanium disc
Справочная цена	$10.00 – $50.00

Описание продукции: Titanium forged bar for flange making from Baoji — Gr2/TA2 & Gr5(TC4) flange billet, open-die forged, annealed, UT per PO, EN 10204 3.1 heat-traceable. B348供坯 + B381最终锻件双路径。Quote with flange drawing &

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Проверено и поддерживается инженерной командой Shaanxi Qianyi Tuoda Technology Co., Ltd.

Titanium Forged Bar for Flange Making | Gr2 / Gr5 (TC4) Flange Billet, UT-Ready

Meta Description: Titanium forged bar for flange making from Baoji — Gr2/TA2 & Gr5(TC4) flange billet, open-die forged, annealed, UT per PO, EN 10204 3.1 heat-traceable. B348 billet + B381 finished forging dual route. Quote with flange drawing & class.

Overview — A Flange Is Only as Sound as Its Billet

A flange is not "a shape turned on a lathe" — it is "density delivered by forging". Using a plain hot-rolled bar to machine a large flange carries internal risk: eccentricity, directional porosity, retained scale, and UT rejection. Forged bar (open-die forged bloom/bar) goes through upsetting and drawing-out cycles — grains are refined, flow lines align radially along the flange profile. That is the billet a high-pressure, seawater, or acid-service flange actually needs.

We supply flange billets: forged round bar, forged disc, and forged ring — selected by application. Billet supply follows ASTM B348 (forged/annealed bar stock); finished flange forgings are accepted to ASTM B381 (F-2/F-5, etc.). Two separate lines — your PO must name which one.

Forged Bar vs Rolled Bar for Flange Blank

Factor	Hot-Rolled Bar Blank	Forged Bar Blank (This Page)
Internal soundness	Moderate; strong directionality	Upset-forged, porosity healed, uniform
Grain structure	Elongated along rolling direction	Equiaxed; transverse/longitudinal balanced
UT pass rate	Risky on large sections	Far more reliable on large diameters
Scale / eccentricity	Heavy peel allowance needed	Controlled forge + peel stock
Cost	Lower	Higher (forging ratio + heats built in)
Application	Low-pressure, non-critical, static	PN16+, seawater, acid, ASME B16.5 flanges

One-line rule for procurement: small-bore low-pressure flanges — rolled bar is fine. DN80+, PN40+, sour/hydrogen/sea/FGD service — go forged bar or forged disc.

Three Billet Forms — How to Choose

Form	Best for	Note
Forged round bar	WN flange necks, small-to-mid DN integral flanges	Φ80–300mm routine; larger = forged disc
Forged disc / bloom	Slip-on plates, large DN integral flanges, tube-sheet hybrids	OD calculated from flange OD + machining allowance
Forged ring (rolled ring)	Large-DN WN, blind flanges, lap joints	Material-saving; grain flow follows ring direction, good fatigue

Stock Scope (Honest)

Grade	Form	Size	Condition	Status
Gr2 / TA2 (R50400)	Forged bar / disc / ring	Bar Φ80–350mm; disc Φ200–1200mm project	As-forged / annealed (M)	Common bar sizes rotating; disc/ring to drawing
Gr5 / TC4 (R56400)	Forged bar / disc	Bar Φ80–300mm; larger on project	Annealed; STA on PO	Common sizes on hand
Gr7 / Gr12	Forged bar	Per drawing	Annealed	Heat-confirm
Gr23 ELI	Forged bar / disc	Project	ELI + F136 chain	Separate PO

Honest note: flange forgings are not "every size on a click-buy shelf". DN / PN / facing (RF/FF/RTJ) dictates billet diameter and allowance. Send the drawing first; we quote forging ratio and heats.

Chemistry (ASTM B348 / B381 Ref.)

Element	Gr2 / F-2	Gr5 / F-5 (TC4)
Ti	Balance	Balance
Fe max	0.30%	0.40%
O max	0.25%	0.20%
N max	0.03%	0.05%
H max	0.015%	0.015%
C max	0.08%	0.08%
Al / V	—	5.5–6.75 / 3.5–4.5%

Mechanical Floor (Annealed, Reference)

Grade	UTS min	YS min	Elong	RA
Gr2 / F-2	345 MPa	275 MPa	≥20%	≥30%
Gr5 / F-5	895 MPa	828 MPa	≥10%	≥25%

Values reference ASTM B348 / B381 annealed minima. Final flange forging acceptance = B381 F-2/F-5 + current edition + PO matrix.

UT & Forging Acceptance (Write Into PO)

100% volumetric UT on billet (ASTM E2375 / B381 NDE direction), FBH calibre per PO grade
Surface PT per B381 forging surface inspection; repair welding prohibited on forgings per spec
Forging ratio recorded on MTC; heat count / finish-forge temp available on process sheet
EN 10204 3.1 (mill-authorized IR); 3.2 (SGS/BV/TÜV) witness PO-fronted, not back-signed
Grain size / beta fleck / alpha-case testing added per sour-service / aero PO
Heat traceability: ingot → forged billet → finished flange, one heat one cert

Machining Allowance (Align With Your Shop)

Item	Typical allowance
OD turning	3–6mm per side (by DN and billet dia.)
Thickness	4–8mm per face (larger DN = larger value)
WN neck bar	OD leave + end facing stock
Facing	RF/RTJ finish-machined in-house; forging blank does NOT pre-form seal groove
Straightness / flatness	Checked after stress-relief anneal

Allowance is not "the bigger the safer" — more allowance = heavier forging = higher unit price. Give us DN + PN + standard (ASME B16.5 / HG / EN1092), we back-calculate the minimum economic billet.

Grade Selection by Flange Service

Service	Recommend	Reason
Seawater / Cl⁻ / hypochlorite	Gr2; Gr7 for aggressive reducing acid	Corrosion-first; Gr2 sufficient for PN med-low
Hot brine / acid media	Gr7 / Gr12	Pd / Mo-Ni crevice resistance
High-pressure PN40+ / aero / power	Gr5 TC4	Strength-to-weight; thinner flange profile
Implant / medical (non-pipe)	Gr23 ELI + F136 chain	Separate cert lineage

Flange Standard Alignment

Billet supply: ASTM B348 (forged bar) / GB/T 2965 (domestic TC4 forged bar route)
Finished forging: ASTM B381 F-2 / F-5 / F-7 / F-12
Dimensions: ASME B16.5 / B16.47 / EN1092 / HG/T20592 / JIS B2220 / DIN
Pressure class: Class 150–2500 / PN6–PN100+ (per drawing)
Facing: RF / FF / RTJ / MFM / TG

Enquiry Template (Copy-Paste for Flange Buyers)

Flange standard: ASME B16.5 / EN1092 / HG/T20592 ___
DN / NPS: ___   PN / Class: ___
Type: WN / SO / BL / PL / RTJ flange ___
Grade: Gr2 / Gr5(TC4) / Gr7 / Gr23 ___
Blank form: forged round bar / disc / ring ___
Billet dia (if bar): Φ___ mm
Disc OD × Thk: ___ × ___ mm
Ring OD × ID × H: ___ × ___ × ___ mm
Condition: as-forged / annealed (M) / STA
UT: B381 level / E2375 FBH ___ / 100% volumetric Y/N
Surface: descaled / pickled / peeled / rough-turned
Cert: EN 10204 3.1 / 3.2 (TPI: ___)
Machining: rough forged only / finish-machined flange?
Qty: ___ pcs   Target port: ___

FAQ — Titanium Forged Bar for Flange Making

Q1: Can B348 forged bar be delivered as a finished flange?
A: No — don't mix them. B348 is the billet material standard; finished flange forgings are accepted to ASTM B381 (F-2/F-5). We issue B348 + MTC for billet supply; the forging house issues B381 forging cert against the finished part. State clearly in PO.

Q2: At what DN should I switch from bar to disc/ring?
A: Rule of thumb — DN80–100 starts the conversation at higher pressure; DN150+ high-pressure or seawater almost always goes disc or ring. Bar-turned large flanges work but scrap and UT risk rarely justify it.

Q3: How much more does forged bar cost vs rolled?
A: You pay for forging ratio + heats + UT-ready soundness. Small DN low-pressure = rolled saves money. High-pressure / sour service = forged pays back the day the flange doesn't fail.

Q4: Can you guarantee zero defects?
A: No honest supplier does. We run 100% volumetric UT + surface PT per PO grade. Contract language: "accepted per B381, FBH calibre ___, reject on non-conformance." Honesty beats marketing.

Q5: Can Gr5 flanges be welded?
A: Yes — GTAW with pure argon backing, post-weld anneal recommended. STA-condition flanges require re-heat-treat review before welding; don't weld aged stock without evaluation.

Q6: Do you pre-form RTJ grooves in the forging?
A: No. Forging blank leaves finish-machining stock; RTJ/RR grooves are precision-machined by the shop to drawing. Hardness and groove geometry stay in-spec.

Q7: Is repair welding allowed on flange forgings?
A: B381 prohibits unauthorized repair welding on forgings. Surface indications are removed by grinding + UT re-check; beyond limits = reject. Write this into incoming inspection SOP.

Q8: Straightness / flatness of forged billets?
A: Checked after stress-relief anneal. Large discs are controlled by thickness variation / flatness — don't apply bar straightness tolerances to disc blanks.

Q9: Dispatch lead time?
A: Common forged bar sizes on hand → same-week dispatch after PO. Large disc/ring to-drawing → lead quoted honest per ingot + forge schedule. No pretending from a shelf that isn't there.

Q10: Sample / test coupon?
A: Same-heat test block (mechanical / UT reference) supplied with batch. Full-size trial forging quoted as separate project.

Request a Quote

Email: sales@[yourdomain].com

Send flange standard + DN/PN + type + grade + blank form (bar/disc/ring). Reply within 24h: forging-ratio proposal, billet sizing, UT grade, MTC type, dispatch date.

About: Baoji Titanium Valley billet supplier. Titanium forged bar for flange making — Gr2/TA2 & Gr5(TC4) open-die forged bar/disc/ring, annealed, UT per PO, EN 10204 3.1 heat-traceable. B348 billet supply and B381 finished forging acceptance kept on separate lines — no passing rolled bar as forging. Calculate the billet before the quote.

titanium forged bar for flange making