$Pure Titanium Bar Gr2 Gr4 in Stock \| ASTM B348 CP-Ti Round Bar, Annealed, MTC 3.1, Baoji Stock$

$Pure Titanium Bar Gr2 Gr4 in Stock \| ASTM B348 CP-Ti Round Bar, Annealed, MTC 3.1, Baoji Stock$

Pure Titanium Bar Gr2 Gr4 in Stock \| ASTM B348 CP-Ti Round Bar, Annealed, MTC 3.1, Baoji Stock

Спецификация	pure titanium bar Gr2 Gr4 in stock, CP titanium round bar ASTM B348, Gr2 vs Gr4 titanium bar, commercially pure titanium rod stock, TA2 TA4 bar Baoji, titanium bar cut to length MTC 3.1, annealed pure

Описание продукции: Pure titanium bar Gr2 & Gr4 in stock from Baoji — ASTM B348, annealed, Ø3–300mm rotating stock, cut-to-length, EN 10204 3.1 heat-traceable. Gr2 for form/weld/corrosion; Gr4 for higher strength at thin

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Pure Titanium Bar Gr2 Gr4 in Stock | ASTM B348 CP-Ti Round Bar, Cut-to-Length, MTC 3.1

Meta Description: Pure titanium bar Gr2 & Gr4 in stock from Baoji — ASTM B348, annealed, Ø3–300mm rotating stock, cut-to-length, EN 10204 3.1 heat-traceable. Gr2 for form/weld/corrosion; Gr4 for higher strength at thinner wall. Quote in 24h with live heat No.

Overview — Gr2 and Gr4 Are Both "Pure", But Not Interchangeable

Commercially pure titanium is not one material — it is a family graded by interstitial content, mainly oxygen. Gr2 (O ≤ 0.25%) is the ductile workhorse. Gr4 (O ≤ 0.40%) is the strongest CP grade: same passive-film corrosion resistance, noticeably higher yield, less formability.

We keep Gr2/TA2 and Gr4/TA4 round bar in rotating stock in Baoji Titanium Valley. Annealed default, heat-traceable, cut-to-length, EN 10204 3.1. The job of this page is simple: help you pick the right CP grade before you buy — not upsell Gr4 where Gr2 is cheaper and better, and not downgrade to Gr2 where the shaft will fatigue.

Gr2 vs Gr4 — The Real Engineering Trade-off

Factor	Gr2 / TA2	Gr4 / TA4
Oxygen (max)	0.25%	0.40%
UTS min (annealed)	345 MPa	550 MPa
YS min	275 MPa	483 MPa
Elongation	≥20%	≥15%
Formability	Excellent — cold bend/flare/roll	Fair — more springback, more power
Weldability	Straightforward GTAW, no preheat	Weldable, post-weld stress relief advised
Machining	Easier, lower tool wear	Harder (≈200–230 HV), slower feed/speed
Wall/thickness design	Thicker wall, lower stress	Thinner wall OK at same pressure
Cost	Lower	Modest premium for strength

Mechanism in one line: more interstitial oxygen = lattice strain = dislocations blocked = higher strength, lower ductility. That is the whole Gr2→Gr4 story — no alloying, just purity tuned for duty.

When to Use Gr2 (Do Not Over-Specify)

Chemical tanks, piping, shells, tube sheets (rolling tubes in place)
Seawater/desalination low-to-mid pressure, chloride service <80°C
Welded assemblies where ductility of HAZ matters
Bent/flared fittings, bellows, thin-wall fabrications
Surgical instruments, fixtures, non-implant precision parts
Budget-sensitive corrosion jobs with low design stress

When Gr4 Earns Its Premium

Seawater pump shafts, agitator shafts, mixer spindles (higher yield, cavitation/erosion margin)
High-velocity brine or slurry service
Pressure vessels / reactor internals where thinner wall saves weight
Orthopedic-trauma blanks (industrial blank only — implant needs F67/F136 chain, see compliance)
Fasteners needing CP purity + near-alloy strength without Gr5 cost
High-cycle fatigue parts where yield headroom beats formability

Rule of thumb: if design stress stays under ~250–280 MPa and you must form/weld — Gr2. If stress pushes 350 MPa+ or wall thickness is constrained — Gr4.

Stock Scope (Honest)

Form	Grade	Size	Condition	Status
Round bar	Gr2 / TA2	Ø3–300mm; Ø10/16/20/25/30/40/50 common	Annealed (M)	Hot rotating stock
Round bar	Gr4 / TA4	Ø6–150mm common; larger project	Annealed	Core sizes on hand; large dia heat-confirm
Hex / flat	Gr2 / Gr4	Per enquiry	Peeled / drawn	Project stock
Length	100–6000mm; cut-to-length standard			Same-week on in-stock dia.

Honest line: Gr2 moves faster across more diameters. Gr4 core sizes (Ø10–80mm) rotate; exotic dia/long-length confirmed against physical coil/ingot before PI.

Tolerance & Straightness (Machining-Ready)

Item	Supply
Diameter tol	h11 default; h9/h7 TGP on request (ISO 286 + ASTM B348)
Straightness	≤0.5–1.0mm/m cold-drawn; peeled bar per size
Length tol	±0.5–1.5mm saw; facing quoted separate
Ends	Square sawn / deburr / chamfer 30–45°
Surface	Black / pickled / peeled / TGP / bright-drawn (Ra 0.4µm on request)

Chemistry (ASTM B348 Ref.)

Element	Gr2 max	Gr4 max
N	0.03%	0.05%
C	0.08%	0.08%
H	0.015%	0.015%
Fe	0.30%	0.50%
O	0.25%	0.40%
Ti	Balance	Balance

Mechanical Floor (Annealed, ASTM B348)

Grade	UTS min	YS min	Elong	Density
Gr2	345 MPa	275 MPa	≥20%	4.51 g/cm³
Gr4	550 MPa	483 MPa	≥15%	4.51 g/cm³

Values are standard minima, not promised lot averages. Actual MTC carries measured tensile + chemistry per heat.

Corrosion Reality (No Myth-Making)

Both resist seawater/Cl⁻ far better than 316L; passive TiO₂ film does the work
Gr2: slightly better CCT/CPT in hot chloride, better for aggressive reducing acid + cold forming
Gr4: near-equivalent general corrosion, better strength in high-velocity brine / cavitating pump service
Reducing acids (HCl, hot H₂SO₄ >10%): titanium is not universal — request immersion test before spec
HF, dry chlorine, fuming nitric: forbidden zones for untreated CP-Ti

Traceability & Inspection

One parent heat → all cut pieces carry same heat No.
EN 10204 3.1, mill-authorized IR, chemistry + tensile on MTC
UT per PO (AA/A/B level per AMS 2631/2154 advisory or ASTM E2375)
3.2 (SGS/BV/TÜV) witness PO-fronted, not back-signed
Tag = MTC = crate label; no carbon-steel contact in pack

Cutting & Export Packaging

Band-saw + coolant, no heat tint
Deburr / chamfer for lathe loading
VCI paper + PE sleeve + ISPM-15 plywood crate + desiccant for long-sea
Mixed dia separated by EPE, per-piece tag, heat No. in inner pouch
Pre-ship photos: bundle / crate / label

Enquiry Template (Copy-Paste)

Grade: Gr2 / Gr4 / TA2 / TA4 ___
Standard: ASTM B348 / GB T2965 / F67 (industrial only) ___
Diameter: Ø___ mm × length___ mm × ___ pcs
Tolerance: h11 / h9 / h7 / per drawing
Condition: annealed (default) ___
Surface: pickled / peeled / TGP / bright
Ends: sawn / deburr / chamfer ___°
Cert: 3.1 / 3.2 (TPI: ___)
Application: pump shaft / tank / flange blank / fastener / medical-blank
Incoterm: EXW Baoji / FOB Shanghai / CIF ___ / DAP ___
Target port: ___

FAQ — Pure Titanium Bar Gr2 Gr4 in Stock

Q1: Is Gr4 "better" than Gr2?
A: Stronger, not better. Gr4 wins on yield/stress; Gr2 wins on form/weld/cost. Pick by duty, not by grade number.

Q2: Can Gr4 replace Gr2 directly in a welded tank?
A: Only if the design re-rates wall/thickness and welding procedure qualifies Gr4 (post-weld stress relief 550–650°C advised). Don't swap blindly — ductility margin shrinks.

Q3: Is stock really "in stock"?
A: Core diameters reserved on PO after live heat check. We confirm physical stock before PI — no ghost shelf.

Q4: h7 ground bar available?
A: Yes on request for Swiss-lathe feed; lead longer than h11 peeled. State RA target if mirror finish needed.

Q5: Medical implant grade?
A: Industrial Gr2/Gr4 ≠ implant. Implant path = ASTM F67/F136, ELI chain, separate PO, DMR docs.

Q6: Gr4 machining tips?
A: 40–60 m/min, carbide/coated tool, high-pressure coolant, avoid work-hardening. Tool life ~60–70% of Gr2.

Q7: MTC with real numbers?
A: Yes — 3.1 carries measured UTS/YS/elongation + chemistry, not just standard minima.

Q8: Seawater pump shaft — which grade?
A: Gr4 for high-speed/cavitating shafts; Gr2 if budget + lower stress. Both corrosion-OK below ~80°C chloride.

Q9: Dispatch?
A: In-stock dia + PO before 3PM China time → same-week cut/dispatch. Air for line-down, FCL sea for bulk.

Q10: Small MOQ?
A: Stock grades accept cut lots from small kg/qty. Custom dia = mill-run MOQ, stated upfront.

Request a Quote

Email: sales@[yourdomain].com

Send grade + Ø + length + qty + incoterm. Reply within 24h: live heat No., EXW/FOB price, tolerance class, MTC type, dispatch date.

About: Baoji Titanium Valley stock holder. Pure titanium bar Gr2 & Gr4 in stock — ASTM B348, annealed, cut-to-length, EN 10204 3.1, heat-traceable crate-to-ingot. Gr2 when formability and weld matter; Gr4 when yield headroom matters. No grade inflation, no ghost stock — confirm heat before quote.

pure titanium bar Gr2 Gr4 in stock / Baoji CP titanium round bar stock