| Temperature Classification: | Medium Temperature Piping |
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| MPa Classfication: | Medium Pressure Piping |
| Material: | Aluminium Alloy |
| Standard: | ASTM, GB, API, DIN, JIS |
| Cross-Section Shape: | Round |
| Connection Type: | Seamless |
| Samples: |
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| Customization: |
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6061 (Unified Numbering System (UNS) designation A96061) is a precipitation-hardened aluminium alloy, containing magnesium and silicon as its major alloying elements. Originally called "Alloy 61S", it was developed in 1935.[2] It has good mechanical properties, exhibits good weldability, and is very commonly extruded (second in popularity only to 6063).[3] It is one of the most common alloys of aluminium for general-purpose use.
It is commonly available in pre-tempered grades such as 6061-O (annealed), tempered grades such as 6061-T6 (solutionized and artificially aged) and 6061-T651 (solutionized, stress-relieved stretched and artificially aged).
| Product Name | Aluminium 6061, 6082 Seamless Pipe Aluminium 5086, 5052, 1100 Seamless Pipe 7075, 1100 Aluminium Seamless Pipe UNS A96061 Seamless Pipe WERKSTOFF NR. 3.1255 Seamless Pipe ASTM B211 5083 Aluminium Seamless Pipes |
|---|---|
| Size Range | 1/2″ (15 NB) to 48″ (1200NB) |
| Standard Size | DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN300 |
| Class / Pressure Rating | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standards / Dimensions | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605 |
| Flange Face Types / Connection Type | Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G) |
| Condition | Temper,Mill Finish, Anodized, Powder Coated, Wooden Finish, Polish O - Soft H111 - Some work hardening imparted by shaping processes but less than required for H11 temper H112 Alloys that have some tempering from shaping but no special control over the amount of strain- hardening or thermal treatment. Some strength limits apply. H116 Special corrosion resistant temper. H32 - Work hardened by rolling then stabilised by low-temperature heat treatment to quarter hard |
| Relate material | Aluminum:1070A,1060,1100,1200 ,2A11,2017,2A12,2024 ,3003, 3A21,5A02,5052,5A03,5A05,5A06,5083,5086,5454,6061,6063,6A02,6082,6005 |
| Material Test Certificates (MTC) | As per EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103 |
| Application | cryogenic applications,semi-trailers Air separation plants LNG and natural gas processing plants Petrochemical plants Hydrogen and synthesis gas plants Adsorption and membrane plants Cryogenic plants Carbon capture and utilisation plants Furnaces, fired heaters, incinerators semi-trailers,Aluminum 5083 fittings for semi-trailers |
| Tests | Hydrostatic testing machine, Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Magnetic particle detector |
| Equipment / Machines | Press machine, Pushing Machine, Bending machine, Sand-blasting machine, electric bevelling machine, etc. |
The mechanical properties of 6061 depend greatly on the temper, or heat treatment, of the material.[5] Young's Modulus is 69 GPa (10,000 ksi) regardless of temper.[6]
Annealed 6061 (6061-O temper) has maximum ultimate tensile strength no more than 150 MPa (22 ksi),[7][8] and maximum yield strength no more than 83 MPa (12 ksi)[7] or 110 MPa (16 ksi).[8] The material has elongation (stretch before ultimate failure) of 10-18%. To obtain the annealed condition, the alloy is typically heated at 415 °C for 2-3 hours.[9]
T4 temper 6061 has an ultimate tensile strength of at least 180 MPa (26 ksi)[8] or 210 MPa (30 ksi)[7] and yield strength of at least 110 MPa (16 ksi). It has elongation of 10-16%.
6061-T6 aluminium standard heat treating process
T6 temper 6061 has been treated to provide the maximum precipitation hardening (and therefore maximum yield strength) for a 6061 aluminium alloy. It has an ultimate tensile strength of at least 290 MPa (42 ksi) and yield strength of at least 240 MPa (35 ksi). More typical values are 310 MPa (45 ksi) and 270 MPa (39 ksi), respectively.[10] This can exceed the yield strength of certain types of stainless steel.[11] In thicknesses of 6.35 mm (0.250 in) or less, it has elongation of 8% or more; in thicker sections, it has elongation of 10%. T651 temper has similar mechanical properties. The typical value for thermal conductivity for 6061-T6 at 25 °C (77 °F) is around 152 W/m K. The fatigue limit under cyclic load is 97 MPa (14 ksi) for 500,000,000 completely reversed cycles using a standard RR Moore test machine and specimen.[12] Note that aluminium does not exhibit a well defined "knee" on its S-N curve, so there is some debate as to how many cycles equates to "infinite life". Also note the actual value of fatigue limit for an application can be dramatically affected by the conventional de-rating factors of loading, gradient, and surface finish.
6061 Aluminium alloy composition by mass:[4]
| Constituent element |
Minimum (% by weight) |
Maximum (% by weight) |
| Al | 95.85% | 98.56% |
| Mg | 0.80% | 1.20% |
| Si | 0.40% | 0.80% |
| Fe | 0 | 0.70% |
| Cu | 0.15% | 0.40% |
| Cr | 0.04% | 0.35% |
| Zn | 0 | 0.25% |
| Ti | 0 | 0.15% |
| Mn | 0 | 0.15% |
| (others) | 0 | 0.15% total (0.05% each) |
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