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ASTM B468 Alloy 20 Welded Tubes And Tubing Manufacturer

ASTM B468 Tubes / ASTM B468 Welded Tubes / ASTM B468 UNS N08020 Welded Tubes / ASTM B468 Alloy 20 Welded Tubes / ASTM B468 Nickel Alloy Welded Tubes / ASTM B468 Nickel Alloy 20 Welded Tubes / ASTM B468 Carpenter 20 Welded Tubes

ASTM B468 - Welded Tube

ASTM B468 Welded Tubes which are covered under standard ASTM B468 specification, which are made from flat rolled sheet stock of material. These Flat sheets of material are then rolled through an piercing roller and then through an automatic welding process where no addition of filler metal is done. The Welded Tubes are further subjected to heat treatment, where it should be furnished in stabilized annealed conditions. This ASTM B468 specification covers ASTM B468 UNS N08020 Welded Tubes (ASTM B468 Alloy 20 Welded Tubes) which are intended for applications like boiler, heat exchangers and condenser tubes with properties like general resistance towards corrosion and applicable at low or high temperature environments. Subsequent to final heat treatement, the alloy material should be cold-worked in either both weld and base metals or only weld metal. Tubing of alloy 20 shall be furnished in the stabilized-annealed condition. The alloy material should adhere to composition limit specified. These ASTM B468 Nickel Alloy 20 Welded Tubes provide excellent resistance towards corrosion in all alkaline and acidic environments and are highly applicable in oil and gas refinery.

Scope And Manufacturing

Siddhagiri Metals and Tubes specializes in manufacturing and supplying high quality products like Pipe (Seamless/Welded), Tube (Seamless/Welded), Flanges, Fasteners, Nuts Fasteners, Bolts Fasteners, Screws Fasteners, Washers Fasteners, Pipe Fittings, Tube Fittings, Forged Fittings, Round Bar, Sheet Plate and Wire Mesh in all the grades such as Inconel, Incoloy, Monel, Hastelloy, Duplex 2205, Super Duplex 2507, 254 SMO, Copper nickel 90/10, Alloy 20, Nickel, Stainless Steel, Titanium, AISI 4130, Brass, etc. We are always happy to fulfill your requirements and will quote the best price for your material. Siddhagiri Metals and Tubes also specializes in manufacturing and supplying SS904L and Duplex2205 in huge qualtity.

The ASTM B468 Alloy 20 Welded Tubes should adhere to all the specification as mentioned in ASTM B468, like its chemical composition, mechanical properties and dimension standards. As per specification, it should adhere to chemical composition requirement for carbon, manganese, sulfur, phosphorous, nickel, silicon, copper, chromium, molybdenum, columbium, tantalum, niobium, nitrogen and iron.

Siddhagiri Metals and Tubes exports Alloy 20 Welded tubes which are used in oil and gas refinery. These Alloy 20 Welded Tubes provide excellent corrosion resistant in all acidic and alkaline environments


We are manufacturers of high-quality ASTM B468 Welded Tubes. Siddhagiri Metals and Tubes stocks a varied range of alloy 20 tubes in many sizes and forms. Contact us for best price.
Other Names: ASTM B468 Welded Tube, Alloy 20 Welded Tubes, Carpenter 20 Welded Tube
Material: Alloy 20, Carpenter 20
Brand: Siddhagiri Metals and Tubes
Manufacturer: Siddhagiri Metals and Tubes
Rating: 3.7/5 based on 65 customer reviews

Our Products: -

Siddhagiri Metals and Tubes are largest suppliers of ASTM B468 Alloy 20 Welded Tubes (ASTM B468 UNS N08020 Welded Tubes) which are available in different sizes and lengths. Siddhagiri Metals and Tubes have large and exclusive inventory supports our clients' needs at immediate basis. We at Siddhagiri can provide pipes and tubes with coating as required and we have a huge stock of various size and diameters of pipes and tubes for any kind of industrial projects and needs.

ASTM B468 Welded Tube
Seamless Pipe Grade UNS No ASTM B468 Grade
Astm B161 Seamless Pipe and Tube
  • ASTM B468 Nickel 20 Welded Tubes
  • ASTM B468 Nickel Alloy 20 Welded Tubes
  • ASTM B468 Carpenter 20 Welded Tubes
  • ASTM B468 UNS N02200 Welded Tubes
  • ASTM B468 Alloy 20 Welded Tubes
  • ASTM B468 Nickel Alloy Welded Tubes

Chemical Composition Limits:-

Elements Composition, %
UNS N08020
Carbon, max 0.07
Manganese, max 2.00
Phosphorous, max 0.045
Sulfur, max 0.035
Silicon, max 1.00
Nickel 32.00 - 38.00
Chromium 19.00 - 21.00
Molybdenum 2.00 - 3.00
Copper 3.00 - 4.00
Columbium(Nb) +Tantalum 8 x carbon 1.00
Iron remainder

Mechanical Properties And Other Requirements:-

The ASTM B468 UNS N08020 Welded Tubes should adhere to the mechanical properties as specified in ASTM B468 specification like, tensile strength, yield strength, elongation, rockwell hardness and also should be tested for the following test like, flattening test, non-destructive test, and flange test.

Grade Tensile Strength, min, psi (MPa) Elongation 2inches or 50.8mm or 4D min, % Yield Strength (0.2% offset)
min
ksi MPa ksi MPa
Alloy 20 80 551 30.0 35 241

This ASTM B468 Specification further covers welded tubes of 1/8 inches to 5inches (3.18mm to 127mm), inclusive in outside diameter and 0.015inches to 0.500inches (0.38mm to 12.70mm), inclusive in wall thickness. Welded tubes having other diameters maybe furnished provided they adhere to all other requirements of ASTM B468 specifications. These welded tubes can be formed into various shapes such as round, square, rectangular, etc.

Flare Test: - The Flare test should consist of test specimen (one end of tube among the lot of 100) with the help of expanding tool having covering an angle of 60 degree, until the specified outside diameter of the tube is increased atleast by 30% from the original. During this process, the tube should not exhibit any cracking through walls.

Grain Size: - An n extended (transverse) sample exhibiting complete wall thickness of annealed alloys shall adhere to the average grain size as specified in ASTM B468 specification.

Hardness: - In stress-relived conditions when annealed ends are specified for tubing, the hardness of the ends should not cross the limits as specified in ASTM B468.

Flattening Test:- From every lot, each end of one tube should be subjected to a flattening test. Rejections should not be due to superficial ruptures resulting from surface imperfection.

Flange Test:- A flange test is done on each end of one tube from each lot.

Hydrostatic or Nondestructive Electric Test: - Every tube should be put through either hydrostatic test or nondestructive electric test. Within the mentioned specification limits of outside diameter of 1/8 inches (3.2mm) and thickness of 0.015 inches (0.38mm), each tube should be tested to an internal hydrostatic pressure of 1000 psi. (6.9MPa). Fiber stress calculated using this formula should not exceed the specification limits.

Specimen Preparation: -

Tension test- The tubes in the final condition (temper) of production are taken as specimen for tension test, and are tested in the direction of fabrication. Tubes are tested in full tubular size or longitudinal strip with reduced gage lengths. The tension test should be performed on stress-relived tubes prior to annealing the ends.

Hardness Test- The hardness test is performed on the inside of the tube near the end or on the specimen cut from the end.

Workman Ship, Finish and Appearance: -

ASTM B468 Welded Tubings are individually covered so that the premium quality of material is retained and there are no damages in the last stages of production. The Tubings should be uniform in quality and temper, commercially straight, smooth and free of any imperfections.

Inspection: - The tubes should be inspected as agreed upon by the purchaser and the manufacturer.

Rejection and Rehearing: - The tube not adhering to the ASTM B468 specification or to authorized modifications should be subjected to rejection. The rejected specimens should be preserved for not less than 3 weeks from test report, and the manufacturer may claim for rehearing within that stipulated time period.

Certification: -

If it is mentioned in purchase order or the contract, then the manufacturer should be able to produce a certificate stating that the material has been manufactured and tested and inspected again with respect to the specification. It should also note the test results of the specimen samples which meets the specification requirements, and should be displayed as and when required.

Product Marking:-

ASTM B468 Welded Tubes are tagged along with the imprints relevant to the job information which also contains information about the delivering destination like heat number, size, material, and part number.