Aluminum Elbow — Factory Direct

Specification of GNEE Aluminum Elbow

 

We keep a rolling inventory of aluminum elbows across five alloys and two pressure classes. Here's the quick reference.

Parameter	Specification
Aluminum Alloy	6061, 6063, 6082, 5083, 5086, 1050, 1060, etc.
Temper	O, T5, T6, T651
Outer Diameter	6 mm – 500 mm
Wall Thickness	1 mm – 50 mm
Angle	45°, 60°, 90°, 180°, Custom
Radius	Short Radius (1D), Long Radius (1.5D), Custom
Schedule	SCH10, SCH40, SCH80, SCH160 (available for specific pipe systems)
Connection	Butt Weld, Socket Weld, Flange, Threaded
Manufacturing	Extruded, Forged, cast, and CNC Machined
Surface	Mill Finish, Anodized, Polished, Powder Coated
Standards	ASTM B241, ASTM B247, EN 755, ASTM B361, ASME B16.9, ANSI B16.28

 

Larger diameters (up to DN600) and non-standard angles (30°, 60°, 120°) are available as custom orders. Send us the drawing or spec sheet and we'll quote within 24 hours.

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Gnee Aluminum Elbow Alloy Grades

 

Not every aluminum elbow is the same alloy. The grade you pick determines weldability, corrosion resistance, and how much pressure the fitting can handle. Below is a straight comparison of the five alloys we stock.

 

6061-T6 Aluminum Elbow

The workhorse. 6061 is the most common aluminum elbow alloy for a reason-it balances strength, weldability, and cost.

Property	Value
Tensile strength	290 MPa (42 ksi)
Yield strength	240 MPa (35 ksi)
Elongation	8–10%
Corrosion resistance	Good (better with anodizing)
Weldability	Excellent (TIG/MIG)

Where it's used: General industrial piping, compressed air lines, structural frames, and hydraulic systems. Anywhere you need a fitting that won't crack under pressure but doesn't cost marine-grade prices.

Stock sizes: DN15–DN200, SCH40 & SCH80. Both 45° and 90°.

 

5083-O Aluminum Elbow

The marine-grade option. 5083 has the highest strength of the non-heat-treatable alloys and far better saltwater corrosion resistance than 6061.

Property	Value
Tensile strength	270–345 MPa
Yield strength	115–200 MPa
Elongation	12–16%
Corrosion resistance	Excellent (seawater-rated)
Weldability	Good (use 5183 or 5356 filler)

Where it's used: Ship piping systems, offshore platforms, coastal chemical plants, and cryogenic lines. If your system runs near salt water or handles aggressive fluids, 5083 is the right call.

Stock sizes: DN25–DN200, SCH40 standard. 90° butt weld in regular inventory; 45° available on short lead time.

 

6082 Aluminum Elbow

The structural choice. 6082 offers higher strength than 6063 and better load-bearing performance while maintaining good corrosion resistance for industrial and marine environments.

Property	Value
Tensile strength	290–340 MPa (42–49 ksi)
Yield strength	240–280 MPa (35–41 ksi)
Elongation	8–12%
Surface finish	Good (can be anodized, but less decorative than 6063)
Formability	Moderate

Where it's used: Structural frameworks, transportation systems, marine piping, pressure systems, and heavy-duty industrial applications. Ideal where strength and durability are more critical than appearance.

Stock sizes: DN15–DN200. Available in 45° and 90° elbows and threaded, socket, and butt weld types. Custom sizes available on request.

 

 

1050 / 1060 Aluminum Elbow

The pure aluminum option. 1050 and 1060 are 99.5%+ aluminum with minimal alloying elements. Strength is lower than the 6xxx series, but electrical conductivity and chemical resistance are unmatched among aluminum grades.

Property	1050	1060
Al purity	99.5% min	99.6% min
Tensile strength	60–100 MPa	70–110 MPa
Electrical conductivity	61% IACS	62% IACS
Corrosion resistance	Excellent	Excellent

Where it's used: Chemical processing, food-grade piping, electrical bus systems, heat exchangers. Any application where you prioritize corrosion resistance and conductivity over mechanical strength.

Available as a custom order-typical lead time 20–30 days depending on size and quantity.

 

 

Threaded Elbow

Internal NPT or BSPT threads on both ends. Screws directly onto threaded pipe-no welding required. Popular for smaller-diameter systems where welding isn't practical.

Thread standards: NPT, BSPT, BSPP (specify when ordering)

Typical use: Water lines, low-pressure air systems, maintenance applications

 

Street Elbow

One male end, one female end. Connects a threaded fitting directly to a threaded pipe without a nipple in between. Saves a joint and about 50 mm of space.

Typical use: Tight plumbing runs, equipment connections

 

Reducing Elbow

Different diameters on each port step the pipe size down (or up) while changing direction. Eliminates a separate reducer fitting.

Typical use: Branch connections feeding smaller-diameter lines

Available as custom order - specify both port diameters when inquiring

 

SCH40 vs. SCH80-Which Wall Thickness?

 

Feature	SCH40	SCH80
Wall thickness	Standard	~50% thicker than SCH40
Pressure rating	Up to Class 150	Up to Class 300
Weight	Lighter	Heavier
Cost	Lower	Higher
Common with	General industrial, water, air	High-pressure steam, chemical, offshore

 

Most orders ship as SCH40. If your system runs above 150 psi or handles anything hazardous, go SCH80. Not sure which you need? Send us the working pressure and media type and we'll recommend the right schedule.

 

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Dimension Reference - Standard Sizes

The table below covers our regular stock range for 90° long-radius butt weld elbows. All dimensions in mm unless noted. 45° elbows share the same OD and wall-the center-to-face dimension differs (ask for the 45° chart if needed).

 

90° Long Radius Butt Weld Elbow

Nominal Size	OD (mm)	Wall - SCH40 (mm)	Wall - SCH80 (mm)	Center-to-Face (mm)	Approx. Weight - SCH40 (kg)
DN15 (½″)	21.3	2.77	3.73	38	0.06
DN20 (¾″)	26.7	2.87	3.91	38	0.09
DN25 (1″)	33.4	3.38	4.55	38	0.14
DN32 (1¼″)	42.2	3.56	4.85	48	0.25
DN40 (1½″)	48.3	3.68	5.08	57	0.38
DN50 (2″)	60.3	3.91	5.54	76	0.68
DN65 (2½″)	73.0	5.16	7.01	95	1.30
DN80 (3″)	88.9	5.49	7.62	114	2.08
DN100 (4″)	114.3	6.02	8.56	152	4.30
DN125 (5″)	141.3	6.55	9.53	190	7.70
DN150 (6″)	168.3	7.11	10.97	229	12.90
DN200 (8″)	219.1	8.18	12.70	305	25.40

 

Important: Weights are approximate. Actual weight varies with alloy density and manufacturing tolerance. 5083 elbows run slightly lighter than 6061 at the same dimensions due to lower density. Short radius elbows weigh roughly 20–25% less than the LR equivalents listed above.

Non-standard ODs and intermediate wall thicknesses are available on custom order. Common custom requests include DN250 (10″) and DN300 (12″), which we produce regularly.

 

Surface Finish Options

 

Finish	What It Does	Best For
Mill finish	As formed, no post-treatment. Natural aluminum surface.	General industrial, hidden pipe runs, applications where aesthetics don't matter
Clear anodized	10–15μm oxide layer. Boosts corrosion resistance. Silver-white appearance.	Outdoor installations, architectural projects, food processing
Color anodized	10–20μm oxide layer with dye. Black, bronze, gold, custom RAL.	Architectural, retail displays, branded equipment
Polished	Mechanical polish to 320–600 grit. Bright reflective finish.	Decorative, exhibition, high-visibility applications
Hard anodized	25–50μm thick oxide layer. Surface hardness 350–500 HV.	High-wear environments, abrasive media handling

 

Anodized elbows are available in 6061 and 6063 only. 5083 can be anodized but develops a slightly yellowish tint - if appearance matters, stick with 6063 for best results.

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Applications of Aluminum Elbow

 

Over the years our elbows have gone into a wide range of systems. Here's a sampling - if your industry isn't listed, ask. We've probably done it.

Oil & Gas 6061 and 5083 butt weld elbows in SCH40 and SCH80. Instrument air lines, lube oil systems, cooling water circuits on offshore platforms. 5083 specified when salt spray is a factor.

Chemical Processing 1050/1060 pure aluminum elbows for acid transfer lines and high-purity chemical piping. Seamless construction preferred to eliminate crevice corrosion at weld seams.

Marine & Shipbuilding 5083 elbows throughout - bilge piping, ballast water systems, deck washdown lines, fire main branches. DNV certification available.

HVAC & Refrigeration 6061 long radius elbows for chilled water circuits and condenser water loops. LR type preferred to keep pressure drop low in long pipe runs.

Food & Beverage 1050/1060 elbows for product contact lines. 6063 clear-anodized elbows for CIP (clean-in-place) supply piping. All food-grade orders ship with surface roughness data.

Construction & Architecture 6063 threaded and socket elbows in clear or color anodized finish. Handrail returns, canopy frames, sunshade support structures. The fittings need to look clean - 6063 anodizes better than 6061 for visible applications.

Compressed Air & Gas 6061-T6 SCH40 butt weld elbows - the standard in compressed air distribution for factories and workshops. Leak-tight when welded, no thread sealant to degrade over time.

Power Generation 6061 and 5083 elbows for cooling water systems, hydrogen cooling circuits, and auxiliary piping. Full MTR traceability and 3.2 certification as standard on power-gen orders.

 

 

Quality Inspection

 

- PMI (Positive Material Identification) to verify alloy composition
- Dimensional inspection - CLR tolerance ±1%, OD within ±0.5%
- Visual inspection for surface defects
- Hydrostatic testing available on request (adds 3–5 days to lead time)

 

Certifications

 

- EN 10204 3.1 material certificates (standard with every order)
- Mill Test Reports showing chemical composition and mechanical properties
- 3.2 certificates with third-party inspection available (TÜV, SGS, BV - specify when ordering)
- Certificate of Origin included for customs clearance

 

 

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Packaging & Shipping

 

Standard export packaging:

Each elbow individually wrapped in VCI (volatile corrosion inhibitor) film or plastic bag

Packed in plywood cases or fumigated wooden crates - ISPM 15 compliant

Inner packing foam or corrugated dividers to prevent movement and surface damage

Each case labeled with: purchase order number, alloy grade, size, quantity, net/gross weight

Shipping options:

FOB Shanghai / Ningbo / Tianjin / Qingdao - specify preferred port

CIF to your destination port - we arrange freight and insurance

EXW from our factory - you handle pickup and logistics

 

Typical lead times:

Order Type	Lead Time
Stock sizes, standard alloys	7–15 days
Custom sizes or non-stock grades	20–30 days
Large quantity (5,000+ pieces)	25–40 days

Samples ship within 3–5 days for stock items. Custom samples take 10–15 days.

 

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