Gr5 Titanium Bar Stock ASTM B348 Supplier \| Ti-6Al-4V (TC4), Annealed/STA, MTC 3.1

Product Overview

Reviewed and maintained by the Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd.

Gr5 Titanium Bar Stock ASTM B348 Supplier | Ti-6Al-4V (TC4), Annealed & STA

Meta Description: Gr5 titanium bar stock (Ti-6Al-4V / TC4) from Baoji. ASTM B348 annealed & STA, round/square/hex, h7 precision ground, UT per PO, EN 10204 3.1 heat-traceable. AMS 4928/F136 on request. Quote in 24h.

Overview — Gr5 Is Not "Pure Titanium with Extra Letters"

Gr5 (UNS R56400, 国标 TC4, Ti-6Al-4V) is the workhorse α+β titanium alloy — not CP Ti. It carries ~895 MPa tensile in annealed condition, roughly 2.5× Gr2's strength at 4.43 g/cm³. That strength is why it shows up in landing-gear components, fasteners, marine shafts, medical instruments and CNC blanks.

But the trap isn't machining — it's the standard callout. A procurement officer writing "Gr5 bar" without naming B348 / AMS 4928 / F136 / F1472 will get a cert that QA rejects. We confirm the standard before cutting, not after.

Which Standard — Pick Before PO

Rule: B348 = industrial default. Aerospace = AMS 4928 (annealed) or AMS 4965 (STA). Implant = F136/F1472 + ELI route. Don't let a vendor "upgrade" silently — each has its own cert lineage.

Stock Scope (Honest)

Honest boundary: h6 mirror-ground long bars and Φ250mm+ forged billet = project schedule, not "click-and-ship". We confirm heat + lead before PI.

Chemical Composition (ASTM B348 Gr5, wt%)

Mechanical Properties (Annealed, ASTM B348 Min)

Condition Choices (Don't Guess)

• Annealed (M): default for machining, welding, general structure — best ductility
• Hot-rolled black: forged billet, turned/peeled before finish
• STA: higher strength, lower ductility — aerospace forgings, fasteners; needs PO-stated heat treat
• Duplex anneal: fracture-toughness-critical parts
• ELI (Gr23): medical implant route, O≤0.13%, N≤0.05%

Tolerance & Surface

UT & Inspection (Write Into PO)

• EN 10204 3.1 — mill authorized inspection rep, heat-matched
• UT per ASTM E2375 / AMS 4928 level (Φ0.8mm equiv. FBH typical for aerospace)
• Spectrum analysis (OES) for Al/V/Fe confirmation
• Tensile + charpy/reduction-of-area report on request
• 3.2 (SGS/BV/TÜV) witness at buyer cost, PO-fronted — not retro-signed
• Tag = MTC heat No. = crate label

Where Gr5 Bar Goes

• Aerospace: fasteners, landing-gear pins, spacers, structural brackets
• Marine/offshore: shafts, valve stems, seawater pump components
• Medical: surgical instruments, bone-screw blanks (ELI route for implants)
• CNC: fixtures, racing components, bicycle bottom brackets
• Forging feedstock: billet for closed-die parts
• 3D-printing feed: ELI wire/billet precursor on project

Gr5 vs Gr23 (ELI) — When to Step Down Interstitials

Don't buy ELI for a shaft. Don't put B348 into an implant BOM. Match the interstitials to the risk.

Cutting & Packaging

• Band-saw / circular saw, low-heat, no burn on cut face
• Deburr both ends, anti-seize cap optional
• VCI paper + PE wrap + plywood crate (ISPM-15)
• Desiccant for long-sea; no carbon-steel contact
• Label: grade / OD / cond. / heat No. / PO ref

Enquiry Template (Copy-Paste)

Grade: Gr5 (TC4) / Gr23 ELI ___
Standard: ASTM B348 / AMS 4928 / AMS 4965(STA) / F1472-F136 ___
Form: round / square / hex / forged billet
Diameter: Φ___ mm  (or across-flat ___ mm)
Length: ___ mm × ___ pcs
Condition: annealed / STA / duplex anneal
Tolerance: h9 / h7 / h6 / per drawing
Surface: black / peeled / ground / mirror
UT: AMS 4928 level / E2375 ___ / none
Cert: 3.1 / 3.2 (TPI: ___)
Application: aerospace / marine / medical / CNC
Port: ___ (FOB Shanghai default)

FAQ — Gr5 Titanium Bar Stock

Q1: B348 vs AMS 4928 — same bar?
A: Same alloy, different acceptance lineage. B348 = industrial; AMS 4928 = aerospace with section-dependent UT/chemistry. PO must name which cert QA wants.

Q2: Annealed or STA?
A: Machining/fast-turn = annealed. Max strength aerospace = STA (AMS 4965). STA isn't "better", it's a different property window — confirm before heat treat.

Q3: h7 ground bar in stock?
A: Common diameters (Φ10/12/16/20/25/30/40) rotate ground+h7; odd sizes cut+grind to order, lead stated honest.

Q4: Can Gr5 be welded?
A: Yes, GTAW/EBW with pure argon backing. Post-weld anneal recommended for structural parts; STA welds need re-solution risk review.

Q5: Medical implant use?
A: Industrial Gr5 B348 is NOT an implant cert. Implant path = Gr23 ELI / F136+F1472, ISO 13485 traceability, lower interstitials. We supply the material + cert; QA/MRO owns acceptance.

Q6: UT level?
A: AMS 4928 ~Φ0.8mm FBH typical; industrial B348 UT per PO (Level A/B or E2375 class). Write the level in PO — don't leave it "as supplier sees fit".

Q7: Max diameter?
A: Round to Φ200mm rotating class; forged billet Φ250–300mm+ project-drawn from ingot.

Q8: MTC real 3.1?
A: Mill-issued 3.1 from original mill's authorized inspection rep, heat-matched. Trader-signed copy not passed as mill cert.

Q9: Dispatch?
A: In-stock ground bar + PO before 3 PM China time → same-week cut/dispatch; sea FOB Shanghai, air for urgent CNC line at buyer cost.

Q10: Sample for trial machining?
A: 1 short cutoff from same heat at courier cost, deductible from bulk PO.

Request a Quote

Email: sales@[yourdomain].com

Send diameter × length × condition × standard. Reply within 24h: live heat, EXW/FOB quote, UT scope, MTC type, dispatch date.

About: Baoji Titanium Valley inventory holder. Gr5 (Ti-6Al-4V / TC4) bar stock to ASTM B348 — round/square/hex, annealed & STA on confirm, h7 precision ground, UT per PO, EN 10204 3.1 heat-traceable. AMS 4928 / F136 routed on request. We match the standard to the failure mode, not to the margin.