2017 Aluminum Bar — AMS-QQ-A-225/5 T451 Screw-Machine Round, Square, Hex & Flat
The original automatic-lathe alloy (Alcoa, 1954). Short-breaking chips, 427 MPa T4, EN 10204 3.1 with every lot.
📦 MOQ 100 kg / 1 t · ⏱️ Lead 10–18 days · 📜 EN 10204 3.1 · 💬 Quote in 24 h
B2B tailored pricing — not a catalog price. We quote per your exact alloy, temper, size, quantity & surface finish against current market. Typical detailed quote within 24 h; send a drawing/PDF for priority.
MOQ
100 kg / 1 t
Lead time
10–18 days
Cert
EN 10204 3.1
Quote
within 24 h
AS9100D
Aerospace quality system
EN 10204 3.1
MTC with every lot
ISO 9001
Quality management
AMS-QQ-A-225/5 / ASTM B211
Spec compliance
- 80+ tons AMS-QQ-A-225/5 T451 stock
- In-house HB hardness test
- FOB / CIF / DDP worldwide
- CHALCO / Hydro primary billets
Available forms, sizes & tolerances (HXM stock)
All tolerances meet / exceed AMS-QQ-A-225/5 & ASTM B211 & EN 754-3. Tighter (−50% / −100%) on request. Stock tempers: O, T4, T451, T42. 2017 is the screw-machine alloy — chips break short, no bird-nesting on Swiss-type / multi-spindle lathes.
Round bar · Square bar · Hex bar · Flat bar · Custom profile
| Diameter (mm) | Standard | Tight (−50%) | Stock temper |
|---|---|---|---|
| 5 – 12 | ±0.08 mm | ±0.04 mm | O, T4, T451 |
| 12 – 25 | ±0.10 mm | ±0.05 mm | O, T4, T451 |
| 25 – 50 | ±0.13 mm | ±0.07 mm | T4, T451 |
| 50 – 100 | ±0.20 mm | ±0.10 mm | T4, T451 |
| 100 – 350 | ±0.35–0.80 mm | on request | T451 (turned from billet) |
Quick Answer for procurement
2017 aluminum bar (UNS A92017 / EN AW-2017 / ISO AlCu4MgSi) is a heat-treatable 2xxx-series screw-machine alloy with 3.5–4.5% Cu, 0.4–1.0% Mg, 0.4–1.0% Mn, density 2.79 g/cm³, tensile 427 MPa (T4/T451). It is not fusion-weldable (hot-cracking risk) and its headline advantage is short-breaking chips that never string-wrap on automatic lathes. HXM stocks 80+ tons T451, lead time 10–18 days, MOQ 100 kg stock / 1 t custom, quote in 24 h.
Why specify 2017 aluminum bar?
- Best machinability in 2xxx: ~95% of 2011 (free-cutting king) vs 2024 at 70%.
- Chips break short — no bird-nesting, no string-winding on high-RPM turning.
- 427 MPa T4 — within ~5% of 2024 at 1.5× the feed rate.
- NOT fusion-weldable — use mechanical fastening or braze.
- T451 is the standard machinist temper — stress-relieved for ±0.02 mm.
2017 (Alcoa, 1954) is the global workhorse for turned components — screws, rivets, studs, fittings, hydraulic bodies and precision Swiss-lathe parts where chip control beats peak strength.
2017 aluminum bar specifications
Chemical composition (per ASTM B211 / AMS-QQ-A-225/5, wt %)
| Element | Min | Max | Function |
|---|---|---|---|
| Cu (Copper) | 3.5 | 4.5 | Primary strengthener (Al₂Cu θ-phase) |
| Mg (Magnesium) | 0.4 | 1.0 | Strengthens, forms S-phase |
| Mn (Manganese) | 0.4 | 1.0 | Chip-breaking control, toughness |
| Fe (Iron) | — | 0.70 | Impurity (tighter than 2024) |
| Si (Silicon) | — | 0.80 | Impurity |
| Zn (Zinc) | — | 0.25 | Impurity |
| Ti + Cr | — | 0.10 | Grain refiner |
| Others (each / total) | — | 0.05 / 0.15 | — |
| Al (Aluminum) | Balance | — | Base |
Mechanical properties by temper
| Temper | Tensile (MPa) | Yield 0.2% (MPa) | Elong. (%) | Hardness (HB) | Shear (MPa) | Typical use |
|---|---|---|---|---|---|---|
| O (annealed) | ≤215 | ≤110 | 12–18 | ~45 | 125 | Forming stock, deep drawing |
| T4 | 427 | 275 | 12–22 | ~105 | 260 | Natural aged — machined parts |
| T451 | 427 | 275 | 12–22 | ~105 | 260 | Stress-relieved for precision turning |
| T42 | 427 | 275 | 12–22 | ~105 | 260 | Solution + user-aged |
Physical & thermal properties
| Property | Value | Notes |
|---|---|---|
| Density | 2.79 g/cm³ | ~36% lighter than steel |
| Melting range | 513–640 °C | Solution treat: 495–505 °C |
| Electrical conductivity | 34% IACS (O) | 45% IACS (T4) |
| Thermal conductivity | 134 W/m·K (O) | 155 W/m·K (T4) |
| Modulus of elasticity | 72.5 GPa | Slightly below 2024 |
| Coeff. thermal expansion | 23.0 × 10⁻⁶ /°C | 20–100 °C |
| Machinability rating | ~95% (2011 = 100%) | 6061 = 60% |
2017 vs 2024 vs 6061 vs 2011 — which bar do you need?
| Property | 2017 | 2024 | 6061 | 2011 |
|---|---|---|---|---|
| Strength (T4/T651, MPa) | 427 | 470 | 310 | 325 |
| Machinability (% of 2011) | ✅ 95 | 70 | 60 | 100 |
| Chip behavior | ✅ Short, broken | Tough, stringy | Stringy | Very short |
| Corrosion (atmospheric) | Medium | ❌ Poor | ✅ Excellent | ❌ Poor |
| Weldability (fusion) | ❌ Poor | ❌ Poor | ✅ Good | ❌ Poor |
| Best for | Screw-machine parts | Aerospace frames, ribs | Weldments, marine | Highest-speed turning |
Where 2017 bar is used (turned & fastener parts)
Typical uses: screw-machine parts · hex bolts & threaded studs · rivets & blind-rivet bodies · hydraulic / pneumatic fittings (JIC, ORB) · valve stems & manifold blocks · automotive & motorsport turned parts · furniture knobs & instrument dials · computer / electronics hardware (standoffs, heat-sink bodies) · pump & valve components · bicycle freewheel bodies & derailleur pivots. 70%+ of high-volume turned aluminum parts run on 2017-T451 for its clean chip break.
Buyer pain points — and how HXM solves each
Pain #1
Stringy chips stall the lathe — switched to 2024 → bird-nesting every ~30 parts; cycle time cut 50%.
HXM solution
Stocks certified 2017-T451 Ø5–50 mm for screw-machine use, with chip-breakage test report.
Pain #2
Tolerances slip after heat-treat — quench-warped bar rejected; buying 0-stock + service inflated cost.
HXM solution
Ships T451 (stress-relieved) by default Ø5–200 mm; CNC tolerance ±0.02 mm guaranteed.
Pain #4
Fe/Si out of spec → corrosion — cheap 2017 Fe 0.9% → pitting in 6 months; warranty claim.
HXM solution
MTC reports Fe ≤ 0.55%, Si ≤ 0.65% guaranteed (stricter than ASTM); spectro-checked before shipment.
Pain #5
12+ week EU mill lead time — European mills batch quarterly; +30% premium; stock-out halts line.
HXM solution
80+ tons AMS-QQ-A-225/5 2017-T451 stock Ø5–150 mm; 10–18 day lead time.
Where HXM 2017 bar is already specified (representative cases)
Illustrative program summaries — replace with your real, approved case studies before publishing.
Hex bolts & threaded studs
- 2017-T451 round Ø8–24 mm
- Qty 6.5 t · tolerance ±0.04 mm
- EN 10204 3.1 + spectro cert
- Lead 14 days · CIF Hamburg
✓ Zero chip-related rejects over 9 lots
JIC / ORB fitting bodies
- 2017-T4 hex & round Ø10–40 mm
- Qty 2.1 t · HB hardness report
- AS9100D flow-down docs
- Lead 11 days · FOB Shanghai
✓ Reordered 3× in 9 months
Standoffs & heat-sink bodies
- 2017-T451 round Ø6–16 mm
- Qty 480 kg (below 1 t MOQ)
- Cut-to-length + deburr
- Lead 10 days · DDP Shenzhen
✓ Stock MOQ met, fast turn
2017 bar RFQ checklist — accurate quote in 24 hours
- Alloy & UNS — 2017 / UNS A92017 / EN AW-2017
- Temper — O / T4 / T451 / T42
- Form — round / square / hex / flat / custom
- Size — diameter or A/F, length (mm or inch)
- Quantity — kg or tons (stock vs custom MOQ)
- Tolerance — standard or tight (−50% / −100%)
- Standard — ASTM B211 / EN 754-3 / AMS-QQ-A-225/5
- Certs — EN 10204 3.1 / AS9100D / RoHS?
- Destination & Incoterms — FOB / CIF / DDP + port
📧 Email mailto:[email protected] or WhatsApp +86 137 6190 6384. Drawing/spec PDF gets priority.
Frequently asked questions (2017 aluminum bar)
Is 2017 aluminum bar weldable?
No — not fusion-weldable (MIG/TIG hot-cracking risk from copper). Use mechanical fastening, rivets or braze with 4043/4047 filler. For welded structures use 6061-T6.
T4 vs T451 — what's the difference?
Same strength (427 MPa tensile). T451 is stretched 1–3% after solution treatment to drop residual stress below 40 MPa — the preferred temper for precision turning to ±0.02 mm.
2017 or 2024 for screw-machine parts?
2017 — its tighter chemistry (more Mn, less Fe) is tuned for short-chip machining; on Swiss/multi-spindle lathes it avoids the bird-nesting that plagues 2024. Pick 2024 only when fatigue/static strength dominates over cycle time.
What is the MOQ and lead time?
MOQ 100 kg stock / 1 t custom. Lead time 10–18 days ex-works from 80+ ton 2017-T451 stock (Ø5–150 mm); custom sizes 25–40 days.
Do you provide material certification?
Yes — EN 10204 3.1 MTC + AS9100D mill cert + third-party spectro analysis (Fe ≤ 0.55%, Si ≤ 0.65%) every lot.
2017 vs 2011 — which for high-volume turning?
2011 is the free-cutting king (Bi/Pb added, ultra-short chips) but only 325 MPa and RoHS-restricted in some markets. 2017 is RoHS-clean and stronger (427 MPa) at ~95% machinability — the better all-round screw-machine choice.
Talk to a 2017-aluminum-bar specialist
From 100 kg of Ø8 mm T451 for prototyping to 20 tons of Ø80 mm AMS-QQ-A-225/5 for production — send your drawing, get a quote in 24 h.
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