What does the aluminium temper designation mean?

The temper designation describes the condition in which the aluminium is supplied. T6 means solution treated and artificially aged to full strength, T5 means cooled from the extrusion press and artificially aged, O means annealed, and H32 means strain hardened and stabilised. The required temper should always be stated on the purchase order.

Can you produce custom extruded aluminium profiles?

Yes. Aluminium can be extruded through custom dies to produce multi-void hollow sections, integral fins, channels and other complex profiles. A custom profile normally requires a dedicated extrusion die, which involves a one-time die cost and a minimum order quantity. A drawing or DXF file and estimated annual volume can be used to quote the die and production cost.

What anodising thickness should I specify for aluminium?

For exterior architectural aluminium, a minimum anodic coating thickness of 20 micron is commonly specified for higher durability applications. Interior and general decorative applications may use approximately 10 to 15 micron depending on the environment and specification. The required coating thickness should be stated according to the applicable finish standard and service conditions.

Aluminium Pipes & Tubes Supplier | Size Chart in MM & Weight Chart India

Q: What is the difference between aluminium pipe and aluminium tube?

Aluminium pipe is sized by nominal bore and schedule, so the outside diameter is fixed for a given bore and only the wall thickness changes. Aluminium tube is sized by exact outside diameter and wall thickness or gauge. If your drawing specifies an outside diameter, you generally need tube rather than pipe.

Q: How much lighter is aluminium than steel?

Aluminium is roughly 66 percent lighter than carbon steel by density. Aluminium has a density of about 2,700 kg per cubic metre compared with approximately 7,850 kg per cubic metre for carbon steel. A 4 inch SCH 40 aluminium pipe weighs about 5.53 kg per metre compared with 16.07 kg per metre for carbon steel.

Q: Which aluminium grade should I specify for pipe and tube?

6061-T6 is commonly specified for structural and machined work, 6082-T6 where a European specification applies, 6063 for anodised and architectural sections, 5083 or 5052 for marine applications, 7075 for aerospace and high-strength applications, and 1100 or 3003 where formability and conductivity are more important than strength.

Q: Can aluminium pipe be welded?

Yes. Aluminium pipe can be welded using TIG and MIG processes with suitable filler metals such as 4043 or 5356. The 5xxx and 6xxx series generally weld readily, while 2xxx and 7xxx alloys can be more difficult to weld and are often joined mechanically. Welding locally reduces strength in the heat affected zone, so the joint should be designed accordingly.

Q: Does aluminium pipe rust?

No. Rust is an iron oxide and aluminium does not rust like steel. Aluminium forms a thin, tightly adherent oxide film when exposed to air, which helps protect the underlying metal and can self-repair when damaged. In marine or industrial environments, suitable aluminium alloys and anodising can provide additional protection.

Q: Can aluminium replace steel pipe directly in a design?

Aluminium should not replace steel pipe directly without recalculation. Aluminium has approximately one third the elastic modulus of steel, so an identical section can deflect significantly more. Aluminium also has greater thermal expansion, which can affect support spacing and expansion allowances on long runs. The alloy, section and wall thickness should be selected based on the actual design requirements.

Aluminium Pipe & Tube Manufacturer, Supplier & Stockist in India

Amardeep Steel Centre is a Mumbai based manufacturer, supplier and stockist of aluminium pipes and tubes, holding round, square, rectangular and hollow sections in 6061, 6063, 6082, 5083, 5052, 7075, 3003 and 1100 across the full size range. We supply construction, automotive, aerospace, marine, electrical and general engineering projects across India and export to more than 40 countries with EN 10204 3.1 Mill Test Certificates. Request a quote with your alloy, temper, size and finish.

Specifying Aluminium Pipe and Tube: Alloy, Temper, Finish

Three decisions settle an aluminium order. Get any one wrong and the material is unusable even though the certificate is correct.

T6 or T651 for structural and machined work
- Both give 310 MPa tensile strength and 276 MPa yield strength.
- T651 has additionally been stretched after quenching to relieve residual stress.
- Specify T651 for heavily machined components because T6 can distort as stress is released during cutting.
T4 where forming follows
- 241 MPa tensile strength and 145 MPa yield strength, with substantially greater ductility.
- Specify T4 when the section will be bent or formed after delivery and then aged, or where extra ductility is more important than maximum strength.
O only where deep forming is required
- Maximum tensile strength of 124 MPa.
- Rarely ordered in tube form, but relevant where severe forming is followed by heat treatment.
- Ordering O temper instead of T6 is one of the most costly temper selection mistakes for Aluminium 6061.

Aluminium Alloy Selector: Which Grade for Which Job

Start here rather than with the size chart. Alloy choice constrains everything downstream, including which sections and finishes are even available.

If your priority is	Specify	Tensile (typical temper)	Why
Load bearing and machining	6061-T6	310 MPa	Copper addition gives strength and clean machining
Maximum strength, European spec	6082-T6	310 MPa	Highest strength 6xxx, common on EN drawings
Anodised or visible finish	6063-T6	241 MPa	Low copper and iron, uniform anodising, fine profiles
Complex thin-wall extruded profile	6063-T5	186 MPa	Extrudes faster through more intricate dies
Welded marine structure	5083-H116	300 MPa	Magnesium alloy, saltwater resistance, no heat treatment
Formed marine components	5052-H32	230 MPa	Best formability of the marine alloys
Aerospace and high stress	7075-T6	570 MPa	Highest strength, needs corrosion protection
Deep forming and heat transfer	3003-H14 or 1100-H14	90 to 150 MPa	Formability and conductivity over strength

Temper Designations Explained

Temper	Meaning	Where you see it
O	Annealed, softest and most formable	1100 and 3003 for deep forming
H12 to H18	Strain hardened to increasing strength	Non heat-treatable 3xxx and 5xxx
H32 to H38	Strain hardened and thermally stabilised	5052 and 5083 marine alloys
T4	Solution treated, naturally aged	6061 where forming follows
T5	Cooled from the extrusion press, artificially aged	6063 architectural sections, the economical option
T6	Solution treated, artificially aged to full strength	6061 and 6082 structural, 6063 where strength matters
T651	T6 plus stress relieved by stretching	6061 for heavily machined parts

Because temper is not marked on the extrusion itself, it must appear on the purchase order, the mill certificate and the packing list. Material supplied in the wrong temper is dimensionally identical and cannot be identified without testing.

How Much Weight Does Aluminium Save Against Steel?

This is the reason aluminium is specified and it is worth putting a number on rather than describing as lightweight. Aluminium is 2,700 kg per cubic metre against 7,850 for carbon steel and 8,000 for stainless.

NB, SCH 40	Aluminium kg/m	Carbon steel kg/m	Stainless kg/m	Saved vs steel
1 inch	0.86	2.50	2.54	66 percent
2 inch	1.87	5.44	5.52	66 percent
3 inch	3.88	11.29	11.47	66 percent
4 inch	5.53	16.07	16.32	66 percent
6 inch	9.72	28.26	28.69	66 percent
8 inch	14.60	42.55	43.20	66 percent
12 inch	27.44	79.73	74.62	66 percent

Where that matters commercially: a 100 metre run of 4 inch SCH 40 weighs 553 kg in aluminium against 1,607 kg in carbon steel. That changes crane requirement, support spacing, foundation loading, installation labour and freight cost, and in transport applications it changes payload for the life of the vehicle. Aluminium costs more per kilogram and often less per installed metre.

Design Considerations When Substituting Aluminium for Steel

Four properties differ enough from steel that a direct substitution without recalculation will fail. These are the points our technical team raises most often on enquiry.

Property	Aluminium vs steel	Design consequence
Modulus of elasticity	68.9 GPa against 200 GPa, one third	An identical section deflects three times as much; increase section or accept deflection
Thermal expansion	23.4 against 12 x 10 to the minus 6 per K, double	Expansion loops and support spacing must be recalculated on long runs
Fatigue behaviour	No true endurance limit, unlike steel	Cyclically loaded parts need a finite-life calculation, not an infinite-life assumption
Galvanic contact	Anodic to steel, brass and copper	Isolate at dissimilar metal joints or the aluminium corrodes preferentially
Weld strength	HAZ locally annealed to about T4	Design the joint at the lower figure or re-heat treat the assembly
Service temperature	Strength falls away above roughly 150 C	Not a substitute for steel in elevated temperature service

None of these rules out aluminium. They mean the design has to be done in aluminium rather than borrowed from a steel drawing, and getting that conversation right before the order is placed prevents most of the problems we see on site.

Aluminium Pipe Size Chart in MM: Standard Aluminium Pipe Sizes

Standard aluminium pipe sizes in mm follow the nominal bore and schedule system under ASME B36.10M and ASTM B241. Outside diameter is constant for a given nominal bore; only wall thickness changes with schedule.

NB	OD (mm)	SCH 5	SCH 10	SCH 40	SCH 80	SCH 40 kg/m
1/4"	13.72	–	1.65	2.24	3.02	0.20
3/8"	17.15	–	1.65	2.31	3.20	0.26
1/2"	21.34	1.65	2.11	2.77	3.73	0.44
3/4"	26.67	1.65	2.11	2.87	3.91	0.58
1"	33.40	1.65	2.77	3.38	4.55	0.86
1 1/4"	42.16	1.65	2.77	3.56	4.85	1.16
1 1/2"	48.26	1.65	2.77	3.68	5.08	1.39
2"	60.33	1.65	2.77	3.91	5.54	1.87
2 1/2"	73.03	2.11	3.05	5.16	7.01	2.97
3"	88.90	2.11	3.05	5.49	7.62	3.88
4"	114.30	2.11	3.05	6.02	8.56	5.53
5"	141.30	2.77	3.40	6.55	9.53	7.49
6"	168.27	2.77	3.40	7.11	10.97	9.72
8"	219.07	2.77	3.76	8.18	12.70	14.60
10"	273.05	3.40	4.19	9.27	15.09	20.75
12"	323.85	3.96	4.57	10.31	17.48	27.44
16"	406.40	4.19	4.78	12.70	21.44	42.53
20"	508.00	4.78	5.54	15.09	26.19	63.16

Standard Aluminium Tube Sizes in MM

Aluminium tube is specified by outside diameter and wall thickness rather than nominal bore. These are the standard aluminium tube sizes in mm held in stock.

OD (mm)	Common wall thicknesses (mm)	Typical use
6 to 12	0.5, 0.8, 1.0, 1.5	Instrumentation, pneumatic, small hydraulic
15	1.0, 1.2, 1.5, 2.0	Refrigeration, AC, light structural
16 to 25	1.0, 1.5, 2.0, 3.0	Framework, handrail, general fabrication
30 to 40	1.5, 2.0, 3.0, 4.0	Structural framing, furniture, marine fittings
50 to 63	2.0, 3.0, 4.0, 5.0	Structural, scaffold, ladder, mast
75 to 100	3.0, 4.0, 5.0, 6.0	Heavy structural, conveyor rollers
125 to 150	3.0, 5.0, 6.0, 10.0	Large structural, ducting, marine
Above 150 to 630	5.0 to 30.0	Large bore, custom extrusion to order

Aluminium Square, Rectangular & Hollow Section Sizes

Square section (mm)	Wall (mm)	Rectangular section (mm)	Wall (mm)
12.7 x 12.7	1.0 to 2.0	10 x 20	1.0 to 2.0
19 x 19	1.2 to 2.0	20 x 40	1.2 to 3.0
25 x 25	1.5 to 3.0	25 x 50	1.5 to 3.0
38 x 38	2.0 to 4.0	40 x 80	2.0 to 4.0
50 x 50	2.0 to 5.0	50 x 100	2.0 to 5.0
75 x 75	3.0 to 6.0	60 x 120	3.0 to 6.0
100 x 100	3.0 to 8.0	100 x 200	3.0 to 10.0
Up to 300 x 300	To 30.0	To order	To 30.0

Extrusion, Drawing and Custom Profile Capability

Aluminium tubular product is made by three routes, and unlike stainless, the route is a purchasing choice with consequences for tolerance, finish and price.

Route	How it works	What you get	Specify it for
Extrusion	Heated billet forced through a die, hollow formed over a mandrel	Standard tolerance, good finish, any profile geometry	Standard sections, architectural profiles, custom dies
Cold drawing	Extruded shell pulled through a die over a mandrel	Tight tolerance, smooth bore, work hardened	Hydraulic, instrumentation, precision fits
Welding	Strip roll formed and seam welded, then sized	Economical in large diameter and thin wall	Ducting, large bore, non-critical structural

Custom profiles. Because aluminium extrudes through intricate dies, section geometry is a purchasable variable rather than a fixed catalogue item. Multi-void hollows, integral fins, snap-fit channels and screw ports can all be extruded in one piece. A custom profile requires a die, which carries a one-off cost and a minimum order quantity. Send a drawing or DXF with your annual volume and we will quote the die and the running rate separately. There is no equivalent capability in stainless tube.

Finish Specification: Anodising, Coating and Micron Classes

On stainless, finish is a line item. On aluminium it is a decision with its own price basis, its own failure modes and its own specification standard. Anodising and powder coating are priced by surface area, not by weight, so a thin-wall section carries proportionally more finishing cost than a heavy one.

Finish	Thickness	Priced by	Specify it for
Mill finish	As extruded or drawn	Weight	Concealed sections, subsequent coating
Clear anodised	10 to 15 micron	Surface area	Interior architectural, general decorative
Architectural anodised	20 to 25 micron	Surface area	Exterior facades, AAMA 611 Class I
Colour anodised	15 to 25 micron	Surface area	Bronze, black, champagne architectural finishes
Hard anodised	25 to 50 micron	Surface area	Wear surfaces, 6061 is the better substrate
Powder coated	60 to 100 micron	Surface area	RAL matched facades and railings
Polished or brushed	Mechanical	Surface area	Feature sections, furniture, retail display
PVC filmed	Protective film	Per metre	Transit and site protection on finished sections

The specification error that costs most: ordering exterior architectural work at 10 micron rather than 20. Thin anodic coatings chalk and fade within a few years in coastal or high-UV conditions, and the failure cannot be repaired in place. Specify a minimum 20 micron anodic coating for anything outdoors.

Applications of Aluminium Pipes & Tubes by Industry

Construction and architecture: curtain walling, window and door frames, railings, canopies and structural framing, in 6063 for finish and 6061 or 6082 for load bearing
Automotive and transport: chassis members, crash structures, AC lines, cooling circuits and trailer frames
Aerospace and defence: fuselage stringers, hydraulic lines and structural tube in 7075 and 2024
Marine and shipbuilding: hull framing, superstructure, masts and seawater lines in 5083, 5086 and 5052
Electrical and power: busbar tube, conduit and enclosure framing, using conductivity per unit weight
HVAC and refrigeration: condenser and evaporator tube and refrigerant lines in 1100 and 3003
Compressed air: modular ring mains where a corrosion-free bore holds pressure drop down over the system life
Irrigation and agriculture: portable mains and sprinkler risers, where handling weight governs cost

Aluminium Pipe & Tube Stock in Mumbai

We hold aluminium pipes and tubes ex stock at Sanghrajka House, Lamington Road, Opera House, Mumbai 400004, with same-day quotation and dispatch on standard sizes. Buyers looking for an aluminium pipe or tube supplier near them in Mumbai, Thane, Navi Mumbai or Pune can collect directly or take delivery within Maharashtra in 24 to 48 hours. Elsewhere in India we dispatch to Ahmedabad, Vadodara, Pune, Chennai, Coimbatore, Hyderabad, Bengaluru, Kolkata, Delhi NCR, Ludhiana, Indore, Nagpur, Rajkot, Surat, Jaipur, Visakhapatnam and Kochi.

Export Markets We Supply

We export aluminium pipes and tubes from Mumbai on FOB, CIF and EXW terms to the UAE and Dubai, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Malaysia, Singapore, Indonesia, Philippines, Vietnam, Thailand, Sri Lanka, Bangladesh, Nepal, Kenya, Nigeria, Egypt, South Africa, UK, Germany, Netherlands, Italy, Spain, USA, Canada, Mexico, Brazil, Australia and New Zealand.

Aluminium Pipe Price

Aluminium pipe price is the LME aluminium price plus a conversion premium, and the premium is where the variation sits. It is a different pricing conversation from stainless, where the nickel surcharge dominates.

Cost driver	Effect
Alloy	1xxx and 3xxx lowest, 6063 low, 6061 and 6082 mid, 7075 highest
Temper	T6 and T651 carry a heat treatment premium over T5 and O
Section	Round standard, square and rectangular a small premium, custom profile highest plus die cost
Wall thickness	Very thin and very heavy walls both attract a premium
Finish	Priced per square metre, so thin sections carry proportionally more
Quantity	Full bundle and container quantities attract the best rates

Send your alloy, temper, size, wall, finish and quantity for a same-day quotation, quoted per metre and per kg. Request a quote.

Standards, Testing and Documentation

Standard	Covers
ASTM B241 / SB241	Seamless pipe and seamless extruded tube
ASTM B210 / SB210	Drawn seamless tube
ASTM B221 / SB221	Extruded bars, rods, wire, profiles and tubes
ASTM B234	Drawn seamless tube for heat exchangers and condensers
ASTM B429 / SB429	Extruded structural pipe and tube
ASTM B547	Formed and arc welded round tube
EN 755 and EN 12020	Extruded profiles, and precision profiles
IS 1285	Wrought aluminium extruded round tube and hollow sections
AAMA 611	Anodic finish specification for architectural aluminium

Testing on every consignment covers chemical composition by optical emission spectrometry, tensile and yield strength, elongation and hardness in the supplied temper, and dimensional and straightness inspection. Anodic coating thickness is measured and certified where a finish is specified. Eddy current and ultrasonic testing on drawn seamless tube. Conductivity testing where electrical performance is specified. Third-party inspection by SGS, Bureau Veritas, TUV or Lloyd's Register on request.

Every consignment ships with an EN 10204 3.1 Mill Test Certificate. See our quality certifications and testing capabilities.

HSN Codes of Aluminium Pipes & Tubes

HSN code	Description
7608	Aluminium tubes and pipes
760810	Aluminium tubes and pipes of non-alloy aluminium
760820	Aluminium tubes and pipes of aluminium alloys
7609	Aluminium tube or pipe fittings
7604	Aluminium bars, rods and profiles including hollow profiles

Related Products

Aluminium grades:

Aluminium 6061, Aluminium 6063

Aluminium range:

Aluminium Plates, Sheets & Coils, Aluminium Bars, Rods & Wires, Aluminium Flanges, Aluminium Buttweld Fittings, Aluminium Forged Fittings, Aluminium Fasteners

Get a Quote for Aluminium Pipes & Tubes

Send your alloy, temper, size, finish and quantity, or your full bill of materials, and we will quote the same working day. If you are converting a design from steel, send the steel drawing and we will advise on section and alloy before quoting. Request a quote or contact our Mumbai office.

Frequently Asked Questions - Aluminium Pipes & Tubes

What are the standard aluminium pipe sizes in mm?

Standard aluminium pipe follows the nominal bore system from 1/8 inch to 20 inch NB, with outside diameters from 13.72 mm to 508 mm. Wall thickness is set by schedule, commonly SCH 5, 10, 40 and 80. A 2 inch NB pipe has a 60.33 mm outside diameter regardless of schedule.

What are the standard aluminium tube sizes in mm?

Aluminium tube is sized by exact outside diameter, commonly 6, 10, 12, 15, 20, 25, 30, 40, 50, 63, 75, 100, 125 and 150 mm, with wall thickness from 0.5 mm to 30 mm. Square sections run from 12.7 mm to 300 mm and rectangular from 10 x 20 mm upward.

What is the difference between aluminium pipe and aluminium tube?

Pipe is sized by nominal bore and schedule, so outside diameter is fixed for a given bore and only the wall changes. Tube is sized by exact outside diameter and wall thickness or gauge. If your drawing states an outside diameter, you need tube rather than pipe.

How much lighter is aluminium than steel?

Roughly 66 percent lighter. Aluminium is 2,700 kg per cubic metre against 7,850 for carbon steel. A 4 inch SCH 40 pipe weighs 5.53 kg per metre in aluminium against 16.07 in carbon steel, so a 100 metre run saves over a tonne.

Which aluminium grade should I specify for pipe and tube?

6061-T6 for structural and machined work, 6082-T6 where a European specification applies, 6063 for anodised and architectural sections, 5083 or 5052 for marine, 7075 for aerospace strength, and 1100 or 3003 where formability and conductivity matter more than strength.

What does the temper designation mean?

The temper describes the condition the material is supplied in. T6 means solution treated and artificially aged to full strength. T5 is cooled from the extrusion press and aged. O is annealed. H32 is strain hardened and stabilised. Always state the temper on your purchase order.

Can aluminium pipe be welded?

Yes, by TIG and MIG using 4043 or 5356 filler. The 5xxx and 6xxx series weld readily; 2xxx and 7xxx are difficult and usually joined mechanically. Welding locally anneals the heat affected zone, so design the joint at the lower strength or re-heat treat the assembly.

Does aluminium pipe rust?

No. Rust is an iron oxide and aluminium contains no iron as a base metal. It forms a thin, tightly adherent aluminium oxide film within seconds of exposure, and that film self-repairs when damaged. In marine or industrial atmospheres, anodising or a 5xxx alloy extends service life considerably.

Can aluminium replace steel pipe directly in a design?

Not without recalculation. Aluminium has one third the modulus of steel, so an identical section deflects three times as much, and double the thermal expansion, which changes support spacing on long runs. Send the steel drawing and we will advise on the equivalent aluminium section.

Can you produce custom extruded profiles?

Yes. Aluminium extrudes through intricate dies, so multi-void hollows, integral fins and snap-fit channels can be produced in one piece. A custom profile requires a die, which carries a one-off cost and a minimum order quantity. Send a drawing or DXF with your annual volume.

What anodising thickness should I specify?

A minimum of 20 micron for exterior architectural work, per AAMA 611 Class I. Interior and general decorative work is normally 10 to 15 micron. Thinner coatings chalk and fade within a few years outdoors, and the failure cannot be repaired in place once installed.

What is the HSN code for aluminium pipe?

Aluminium tubes and pipes fall under HSN 7608, with 760810 for non-alloy aluminium and 760820 for aluminium alloys. Aluminium tube and pipe fittings fall under 7609. Confirm the exact classification with your customs broker, as it depends on alloy and end use.

Aluminium Pipes & Tubes