If you are choosing aluminum for a structural component, a CNC-machined part, a bicycle frame, or an aerospace fitting, you have almost certainly narrowed your search to two alloy names: 6061 and 7075. They are the two most requested grades in our factory, and they sit at opposite ends of the performance spectrum.
7075 is the strength champion — with a tensile strength above 570 MPa in the T6 temper, it is one of the strongest commercial aluminum alloys available. It dominates in aerospace, defense, and high-performance sporting goods where weight savings must not compromise load-bearing capacity. The trade-off: it is difficult to weld, more expensive, and less corrosion-resistant.
6061 is the versatile workhorse — with excellent weldability, good corrosion resistance, decent strength (310 MPa in T6), and a price that is typically 30–40% lower than 7075. It is the default choice for structural frames, automotive components, marine hardware, and any application where fabrication flexibility matters more than ultimate strength.
This guide compares 6061 and 7075 across every dimension that matters to a specifying engineer or procurement manager: chemistry, mechanical properties, heat treatment, corrosion, weldability, machinability, anodizing, cost, and real-world applications. At the end, you will find a 5-step decision matrix and a direct quote form for factory-direct pricing from HXM Aluminum.
6061 vs 7075 — Quick Comparison Table
A side-by-side snapshot of the two alloys in their most common temper (T6).
| Property | 6061-T6 | 7075-T6 |
|---|---|---|
| Series | 6xxx (Al-Mg-Si) | 7xxx (Al-Zn-Mg-Cu) |
| Ultimate Tensile Strength | 310 MPa | 572 MPa |
| Yield Strength | 276 MPa | 503 MPa |
| Elongation at Break | 12–17% | 7–11% |
| Brinell Hardness | 95 HB | 150 HB |
| Density | 2.70 g/cm³ | 2.81 g/cm³ |
| Weldability | Excellent | Very Poor |
| Corrosion Resistance | Good | Moderate (exfoliation risk) |
| Machinability | Good | Excellent |
| Typical Price Premium | Baseline | +30–40% over 6061 |
| Primary Market | General structural | Aerospace / high-performance |
Chemical Composition — What Makes Them Different
The fundamental difference between 6061 and 7075 lies in their chemistry. 6061 is a 6xxx-series alloy strengthened by Mg₂Si precipitates; 7075 is a 7xxx-series alloy strengthened by a Zn-Mg-Cu precipitate network. This single distinction drives almost every performance gap between them.
6061 Alloy Chemistry (Al-Mg-Si)
6061 is a 6xxx-series alloy where silicon (0.4–0.8%) and magnesium (0.8–1.2%) form Mg₂Si precipitates during heat treatment. These precipitates are the source of 6061’s moderate strength. The low copper content (≤0.40%) keeps corrosion resistance high.
| Element | 6061 Range (%) | Role |
|---|---|---|
| Si | 0.40–0.80 | Forms Mg₂Si precipitates; primary strength contributor |
| Mg | 0.80–1.20 | Partner to Si in Mg₂Si; improves corrosion resistance |
| Cu | 0.15–0.40 | Minor strength boost; kept low to preserve corrosion performance |
| Cr | 0.04–0.35 | Controls recrystallization; improves toughness |
| Fe | ≤0.70 | Impurity; excess reduces ductility |
| Zn | ≤0.25 | Trace; no significant role in 6xxx alloys |
| Ti | ≤0.15 | Grain refiner during casting |
| Al | Remainder | Base matrix |
7075 Alloy Chemistry (Al-Zn-Mg-Cu)
7075 is a 7xxx-series alloy where zinc (5.1–6.1%), magnesium (2.1–2.9%), and copper (1.2–2.0%) form a complex precipitate network (η-phase MgZn₂ and S-phase Al₂CuMg) that delivers extreme strength. The high copper and zinc content, however, compromise corrosion resistance and weldability.
| Element | 7075 Range (%) | Role |
|---|---|---|
| Zn | 5.10–6.10 | Primary strength contributor; forms MgZn₂ precipitates |
| Mg | 2.10–2.90 | Forms η-phase and S-phase precipitates with Zn and Cu |
| Cu | 1.20–2.00 | Boosts strength via S-phase (Al₂CuMg); reduces corrosion resistance |
| Cr | 0.18–0.28 | Controls grain structure; prevents recrystallization |
| Fe | ≤0.50 | Impurity |
| Si | ≤0.40 | Impurity; no strengthening role in 7xxx |
| Ti | ≤0.20 | Grain refiner |
| Al | Remainder | Base matrix |
Why Chemistry Matters for Your Choice
Mechanical Properties & Heat Treatment
Tensile and Yield Strength by Temper
Both alloys are almost always used in artificially aged (T6 or T651) condition. The T651 designation adds a stretching step after solution heat-treatment to relieve internal stresses, which is critical for precision-machined parts.
| Property | 6061-O | 6061-T6 | 6061-T651 | 7075-O | 7075-T6 | 7075-T651 |
|---|---|---|---|---|---|---|
| UTS (MPa) | 110–150 | 290–310 | 310 | 220–280 | 510–572 | 572 |
| Yield (MPa) | 55–65 | 240–276 | 276 | 95–105 | 415–503 | 503 |
| Elongation (%) | 25–30 | 12–17 | 12 | 16–17 | 7–11 | 11 |
| Hardness (HB) | ~30 | ~95 | 95 | ~60 | ~150 | 150 |
Fatigue Strength
Fatigue performance matters for cyclically loaded parts (landing gear, suspension arms, bike frames).
| Alloy-Temper | Fatigue Strength (MPa) | Typical Endurance Limit |
|---|---|---|
| 6061-T6 | 96 | ~0.33 × UTS |
| 7075-T6 | 159 | ~0.28 × UTS |
7075 has higher absolute fatigue strength but a lower ratio to UTS, meaning it is more sensitive to stress concentrations and surface defects. For fatigue-critical designs, 7075 parts need better surface finish and stricter quality control than 6061.
Shear and Impact Toughness
| Property | 6061-T6 | 7075-T6 |
|---|---|---|
| Shear Strength (MPa) | 186 | 331 |
| Charpy Impact (J) | ~18 | ~10–14 |
7075 has higher shear strength (important for bolt shear and fastener design) but significantly lower impact toughness. If your part must survive impact or crash loads (automotive crash structures, armor), 6061 may be the safer choice despite its lower static strength.
How Heat Treatment Works
Both alloys follow the same sequence but with different precipitate outcomes:
- Solution heat-treat: Heat to ~520°C (6061) or ~475°C (7075) to dissolve precipitates into the aluminum matrix
- Quench: Rapid cooling (water or polymer) to trap dissolved elements in supersaturated solid solution
- Stretch (T651 only): 1–3% permanent stretch to relieve quench stresses
- Artificial aging: Reheat to ~160°C (6061) or ~120°C (7075) for controlled precipitate growth
Corrosion Resistance — The Hidden Trade-Off
6061 Corrosion Performance
6061’s low copper content gives it good general corrosion resistance in atmospheric, freshwater, and mild marine environments. It forms a protective Al₂O₃ oxide layer naturally and performs well without coatings in many structural applications.
- Pitting rate in seawater: ~5–10 μm/year (acceptable for non-critical marine hardware)
- Stress corrosion cracking (SCC): Virtually immune in T6 temper
- Galvanic corrosion: Moderate risk when coupled with steel or copper alloys — isolation required
7075 Corrosion Performance
7075’s high Zn and Cu content creates electrochemical heterogeneity at grain boundaries, making it vulnerable to several corrosion modes:
- Exfoliation corrosion: Layer-like peeling along grain boundaries — severe in T6 temper without proper temper modification
- Stress corrosion cracking (SCC): Real risk in short-transverse direction for thick sections in T6 temper
- Intergranular corrosion: Preferential attack at precipitate-depleted zones along grain boundaries
T73 and T76 Tempered 7075 — Sacrificing Strength for Corrosion Resistance
To mitigate SCC, aerospace specifiers sometimes use 7075-T73 or 7075-T76 — overaged tempers that trade ~10–15% strength for dramatically improved corrosion resistance:
| Temper | UTS (MPa) | SCC Resistance | Typical Use |
|---|---|---|---|
| 7075-T6 | 572 | Poor (risk in ST direction) | High-strength, non-corrosive environments |
| 7075-T73 | ~460 | Excellent | Aerospace structural, corrosive environments |
| 7075-T76 | ~490 | Very Good | Moderate corrosion, high strength compromise |
Surface Protection Strategies
| Method | 6061 | 7075 |
|---|---|---|
| Anodizing (Type II) | Excellent — thick, uniform oxide | Acceptable — thinner oxide, slight discoloration |
| Anodizing (Type III — Hard) | Good — 25–50 μm hard coat | Fair — coat thinner, color limited to dark gray/bronze |
| Powder Coating | Excellent adhesion | Requires proper pretreatment (chromate conversion) |
| Chromate Conversion | Good | Essential — required before painting in aerospace |
| Paint Systems | Straightforward | Needs primer + chromate for long-term adhesion |
Weldability — 6061 Wins, 7075 Fails
6061 Weldability
6061 is one of the most weldable aluminum alloys available:
- MIG (GMAW): Excellent with ER4043 or ER5356 filler — heat input dissolves Mg₂Si precipitates in the HAZ, but post-weld aging restores ~80–90% of original strength
- TIG (GTAW): Excellent — preferred for thin sheet and precision joints
- Friction Stir Welding (FSW): Very good — achieves near-parent-metal strength
- Resistance Welding: Good for sheet thickness ≤3 mm
7075 Weldability — Why It's Considered Unweldable
7075’s Zn-Mg-Cu precipitate network is destroyed by weld heat:
- MIG/TIG: The HAZ loses virtually all strength — joint efficiency drops to ~30% or less
- Hot cracking: High Cu and Zn content creates wide solidification range, causing severe hot cracking in the weld pool
- Stress corrosion: Weld residual stress + inherent SCC susceptibility = high risk of delayed cracking
- Mechanical fastening (bolts, rivets) — preferred in aerospace
- Adhesive bonding — increasingly used in aerospace and automotive
- Friction Stir Welding — experimental; joint efficiency ~70–80% in lab conditions, not production-standard
- Brazing — limited applications, requires careful temperature control
Filler Wire Selection
| Base Alloy | Recommended Filler | Joint Efficiency (no re-heat-treat) |
|---|---|---|
| 6061-to-6061 | ER4043 (Si filler) | ~60% |
| 6061-to-6061 | ER5356 (Mg filler) | ~60% |
| 6061-to-5052 | ER5356 | ~60% |
| 7075-to-7075 | Not recommended | ~30% (hot crack risk) |
| 7075-to-6061 | ER4043 (if forced) | Very poor |
Machinability — 7075 Excels
CNC Machining Comparison
| Parameter | 6061-T6 | 7075-T6 |
|---|---|---|
| Machinability Rating (AA scale) | Good | Excellent |
| Tool Wear | Moderate | Lower — free-cutting Cu particles |
| Chip Formation | Tangled, stringy chips | Short, broken chips (easier to clear) |
| Surface Finish (Ra) | 0.8–1.6 μm achievable | 0.4–0.8 μm achievable |
| Tolerance Holding | ±0.05 mm typical | ±0.02 mm achievable |
| Cutting Speed (m/min) | 200–300 | 300–400 |
| Feed Rate | Moderate | Higher |
Drilling and Tapping
| Operation | 6061-T6 | 7075-T6 |
|---|---|---|
| Drilling | Good; use 135° split-point | Excellent; feeds 30% higher |
| Tapping | Moderate; risk of galling | Excellent; cleaner threads |
| Thread Strength | Lower (softer material) | Higher (harder material) |
| Recommended Tap Type | Spiral-point (gun) tap | Spiral-point; 2B tolerance |
Machining Cost Impact
While 7075 material costs 30–40% more than 6061, its superior machinability can offset the raw material premium in high-volume CNC production. For low-volume prototyping, 6061 is more economical. For production runs >500 pieces of complex machined parts, 7075’s machining advantage may make total cost comparable.
Anodizing & Surface Treatment
Type II Anodizing (Decorative)
| Characteristic | 6061 | 7075 |
|---|---|---|
| Oxide Thickness | 5–25 μm (standard) | 5–20 μm (slightly thinner) |
| Color Range | Wide — clear, black, gold, blue, red | Limited — clear, black, dark bronze |
| Uniformity | Very uniform across surfaces | Minor streaking due to Cu/Zn segregation |
| Hardness of Oxide | Good | Slightly softer due to Cu inclusion |
| Seal Quality | Excellent | Good; requires nickel-acetate seal for best results |
Type III Hard Anodizing
| Characteristic | 6061 | 7075 |
|---|---|---|
| Coating Thickness | 25–50 μm | 25–50 μm |
| Surface Hardness | 400–600 HV | 300–500 HV (Cu weakens oxide) |
| Wear Resistance | Excellent | Good (not as good as 6061) |
| Color | Natural: dark gray to black | Dark gray/bronze only |
| Dimensional Change | +25–50 μm per surface | Same |
For wear-critical applications (hydraulic cylinder rods, sliding bearings), 6061 hard-anodized can outperform 7075 hard-anodized — the cleaner oxide layer is harder and more uniform.
Chromate Conversion Coating (Alodine)
Both alloys accept chromate conversion well, but 7075 requires it more urgently because its natural corrosion resistance is lower. In aerospace, 7075 parts are almost always chromate-converted before painting. 6061 can skip this step in many non-critical applications.
Formability and Bending
Bend Radii by Temper
| Alloy-Temper | Minimum Bend Radius (× thickness t) | Typical Use |
|---|---|---|
| 6061-O | 0–1×t | Deep forming, complex shapes |
| 6061-T4 | 1–2×t | Moderate forming |
| 6061-T6 | 3–5×t | Limited bending; springback high |
| 7075-O | 1–2×t | Some forming possible |
| 7075-T6 | 7–10×t | Very limited bending; cracking risk |
Springback Comparison
6061-T6 has moderate springback (~2–3° per 90° bend). 7075-T6 has very high springback (~5–8° per 90° bend) due to higher yield strength, making precision bending extremely difficult. For formed parts, consider forming 6061 in T4 temper and then aging to T6 after forming.
Common Applications — Where Each Alloy Shines
6061-T6 Typical Applications
- Structural frames: Truck beds, scaffolding, platform supports
- Automotive: Engine brackets, suspension arms, drive shafts, heat exchangers
- Marine hardware: Mast steps, deck fittings, railing (not hull plating)
- Welded structures: Pressure vessels, pipe systems, tanks
- Architectural: Window frames, door frames, curtain wall mullions
- Consumer products: Bicycle frames (mid-range), camera housings, electronics enclosures
- General fabrication: Any application requiring welding + moderate strength + good corrosion resistance
7075-T6 Typical Applications
- Aerospace: Wing spar caps, fuselage frames, landing gear components, seat tracks
- Defense: Armor plate inserts, weapon receivers, UAV structures
- High-performance sports: Premium bicycle frames, mountain bike chainrings, competition rock-climbing hardware
- CNC-machined parts: Precision brackets, aerospace fittings, drone motor mounts, camera gimbal structures
- Mold tooling: Low-volume injection mold inserts, die casting tools
- High-stress fasteners: Aerospace bolts, pins, shear pins
Application Selection Matrix
| Application | Recommended Alloy | Reason |
|---|---|---|
| Welded structural frame | 6061-T6 | Weldability essential |
| Aerospace wing spar | 7075-T6 or T73 | Maximum strength-to-weight |
| CNC-machined bracket | 7075-T6 | Better machinability + higher strength |
| Bicycle frame (mid-range) | 6061-T6 | Weldability + good anodizing |
| Bicycle frame (premium) | 7075-T6 | Maximum stiffness-to-weight |
| Marine deck fitting | 6061-T6 | Corrosion resistance required |
| Armor plate | 7075-T6 | Maximum strength (or 7075-T73 for corrosive) |
| Pressure vessel (welded) | 6061-T6 | Must be weldable + post-weld ageable |
| Hydraulic cylinder rod | 6061-T6 hard-anodized | Hard anodize performs better on 6061 |
| Drone frame | 7075-T6 | High strength, CNC-machined |
| Architectural window frame | 6061-T6 | Anodizing quality + formability |
Standards and Certifications
AMS and ASTM Specifications
| Alloy | Common Specs | Description |
|---|---|---|
| 6061 | AMS 4027, AMS 4028, ASTM B209 | Sheet and plate, various tempers |
| 6061 | AMS 4114, ASTM B221 | Bar and rod |
| 6061 | AMS 4150, ASTM B308 | Structural shapes |
| 7075 | AMS 4044, AMS 4045, ASTM B209 | Sheet and plate, T6/T651 |
| 7075 | AMS 4122, ASTM B211 | Bar and rod |
| 7075 | AMS 4190, ASTM B247 | Die forgings |
Classification Society Approval
| Society | 6061 Approved? | 7075 Approved? |
|---|---|---|
| ABS | Yes (marine hardware) | No (corrosion risk) |
| DNV | Yes | No |
| Lloyd’s Register | Yes | No |
| CCS (China) | Yes | No |
HXM Quality Certifications
HXM Aluminum holds ISO 9001:2015 and provides mill test certificates (MTC) per EN 10204 3.1 for all 6061 and 7075 shipments. Third-party inspection (SGS, BV, TÜV) available upon request.
5-Step Decision Guide — 6061 or 7075?
Follow this decision tree to pick the right alloy in under 60 seconds:
Step 1 — Does your design require welding?
No → Continue to Step 2.
Step 2 — Is the part in a corrosive or marine environment?
No → Continue to Step 3.
Step 3 — Does the part need maximum strength-to-weight ratio?
No (moderate strength is enough) → Choose 6061. It’s cheaper, easier to fabricate, and more versatile.
Step 4 — Is the part CNC-machined with tight tolerances?
No → Continue to Step 5.
Step 5 — Is budget a primary constraint?
No → If Steps 1–4 all point to 7075, choose 7075.
Cost and Lead Time Comparison
Raw Material Pricing (Indicative)
| Product | 6061-T6 Price Range | 7075-T6 Price Range | Premium |
|---|---|---|---|
| Sheet 1–6 mm | $2.80–3.50/kg | $4.00–5.00/kg | +30–40% |
| Plate 6–100 mm | $3.00–4.00/kg | $4.50–6.00/kg | +35–50% |
| Bar/Rod | $3.20–4.20/kg | $5.00–7.00/kg | +50–70% |
| Extrusion | $3.50–5.00/kg | $6.00–9.00/kg | +60–80% |
Prices are indicative for 2026 ex-China, FOB Shanghai. Actual pricing depends on temper, thickness, quantity, and market conditions. Contact HXM for a firm quote.
Total Cost of Ownership
Material price is only one factor. Consider total fabrication cost:
| Cost Driver | 6061 | 7075 |
|---|---|---|
| Material cost/kg | Baseline | +30–40% |
| Welding cost | Standard | Not feasible — must use fasteners/adhesives |
| CNC machining cost | Higher cycle time | Lower cycle time (-20–30%) |
| Heat treatment cost | Standard aging | Tighter control required |
| Surface treatment | May skip conversion coating | Chromate conversion required before paint |
| Scrap rate | Lower (more forgiving) | Higher (brittle, cracks in forming) |
| Inventory availability | Widely stocked | More limited; longer lead time for plate >50 mm |
For complex CNC-machined parts in volume >500: 7075’s machining advantage can offset the material premium, making total cost comparable.
Lead Time at HXM
| Product | 6061 Lead Time | 7075 Lead Time |
|---|---|---|
| Standard sheet/plate (stock) | 3–5 days | 7–10 days |
| Custom thickness/temper | 10–15 days | 15–25 days |
| Extruded profiles | 15–20 days | 20–30 days |
| CNC-machined parts | 10–15 days | 7–12 days (faster machining) |
Sourcing 6061 and 7075 from China — Why HXM
HXM Manufacturing Capability
HXM Aluminum operates a 20,000 m² production facility in Shanghai with:
- Cold rolling line: sheet 0.3–6 mm, plate 6–200 mm
- Heat treatment: solution furnace + quench + aging for T6/T651/T73
- Precision leveling and cutting
- CNC machining partnership for finished parts
- In-house ISO 9001:2015 quality system
What HXM Offers for 6061 and 7075 Buyers
- Full temper range: O, T4, T6, T651, T73 (7075 only)
- Thickness range: Sheet 0.3–6 mm, plate 6–200 mm
- Width: Up to 2,200 mm
- Length: Up to 6,000 mm (custom cut-to-size available)
- Mill test certificate: EN 10204 3.1 with every shipment
- Third-party inspection: SGS, BV, TÜV available on request
- Packaging: Export-standard wooden pallets with moisture barrier
- Shipping: FOB Shanghai / CIF to any port worldwide
Minimum Order and Payment
- MOQ: 500 kg per alloy/temper (negotiable for trial orders)
- Payment: T/T 30% advance, 70% before shipment; L/C at sight for >$50,000
- Sample: Free 1–2 kg sample available for new customers (shipping cost only)
Frequently Asked Questions — 6061 vs 7075 Aluminum
Can 7075 aluminum be welded at all?
Conventional arc welding (MIG/TIG) is not recommended for 7075. The weld heat-affected zone loses virtually all strength (joint efficiency <30%), and the high Cu/Zn content causes severe hot cracking. Alternative joining methods include mechanical fasteners, structural adhesives, and (in research settings) friction stir welding — which achieves ~70–80% joint efficiency but is not yet production-standard for 7075. If welding is required for your design, switch to 6061.
Which alloy is better for CNC machining?
7075-T6 is the superior CNC alloy. Its higher hardness (150 HB vs 95 HB) produces short, clean chips that don’t wrap around tools, enabling 30–40% higher cutting speeds and feeds. Surface finish on 7075 can reach Ra 0.4 μm, versus ~0.8 μm for 6061. For precision-machined aerospace brackets, drone frames, or any part where machining cost dominates, 7075 saves cycle time. For low-volume or prototype work where material cost matters more, 6061 is adequate.
How does anodizing differ between 6061 and 7075?
6061 produces brighter, more consistent anodized finishes with a wider color palette (clear, gold, black, blue, red). 7075’s Cu and Zn content causes slight streaking and limits colors to clear, black, and dark bronze. For hard anodizing (Type III), 6061 achieves a harder, more uniform oxide (400–600 HV) compared to 7075 (300–500 HV). If your product’s appearance matters — consumer goods, bike frames, architectural parts — 6061 is the better anodizing choice.
Is 7075 aluminum harder than 6061?
Yes. 7075-T6 has a Brinell hardness of 150 HB, compared to 6061-T6 at 95 HB — roughly 58% harder. This higher hardness is what gives 7075 its superior machinability and wear resistance, but it also makes 7075 more brittle (elongation ~7% vs ~12% for 6061) and much harder to bend or form.
Can I use 6061 instead of 7075 for aerospace applications?
It depends on the structural requirement. 6061-T6 (310 MPa UTS) can replace 7075-T6 (572 MPa UTS) only if the design allows a heavier part to meet the same load requirement — typically requiring 1.8× more cross-section area, which defeats the weight-saving purpose. For non-critical aerospace hardware (brackets, covers, interior panels), 6061 is acceptable. For primary flight structure (wing spars, fuselage frames, landing gear), 7075 or an equivalent high-strength alloy is mandatory per aerospace design codes.
What is the price difference between 6061 and 7075 aluminum?
7075 typically costs 30–40% more per kilogram than 6061 for sheet and plate, and 50–70% more for bar and extrusions. However, 7075’s faster CNC machining speed can offset the material premium in high-volume production. For welded assemblies, 6061’s total cost is 40–60% lower because 7075 requires expensive fastener/adhesive joining instead of welding. Contact HXM Aluminum for a firm, quantity-dependent quote.
Does 7075 aluminum suffer from stress corrosion cracking?
Yes, 7075-T6 is susceptible to stress corrosion cracking (SCC) in the short-transverse direction of thick sections (>25 mm). This is a well-documented risk in aerospace engineering. Mitigation strategies include: (a) specifying 7075-T73 or T76 overaged temper (sacrifices ~10–15% strength for excellent SCC resistance), (b) shot peening to create compressive surface stress, and (c) avoiding sustained tensile stress in the short-transverse direction. If SCC is a concern and you don’t need 7075’s full strength, consider 6061-T6 instead — it is virtually immune to SCC.
Which alloy should I choose for a bicycle frame?
Mid-range and entry-level bike frames: 6061-T6. It is weldable (TIG-welded frames are industry standard), anodizes in a wide color range, and provides adequate stiffness at a lower price. Premium and competition frames: 7075-T6. It delivers higher stiffness-to-weight ratio, enabling lighter and stiffer frames — but requires tube-to-tube bonding or lug construction since it cannot be TIG-welded. Most premium 7075 bike frames use bonded joints with epoxy adhesives and internal reinforcing sleeves.
Conclusion — Match the Alloy to the Mission
The choice between 6061 and 7075 is not about which is “better” — it is about which is right for your specific design constraints:
- Choose 6061 when: welding is required, corrosion exposure exists, budget is constrained, formability is needed, or anodizing appearance matters.
- Choose 7075 when: maximum strength-to-weight is the priority, the part is CNC-machined (not welded), the environment is dry/non-corrosive, and budget allows the premium.
At HXM Aluminum, we stock both alloys in full temper ranges and ship worldwide from our Shanghai facility. Whether your project calls for 6061-T6 structural plate or 7075-T651 aerospace sheet, we provide mill-certified material with ISO 9001 quality assurance and competitive factory-direct pricing.
