A333 Grade 6 Carbon Steel Seamless Pipes
ASTM A333 (ASME S/A-333)Pipe grades permit low temperature service. This specification covers nominal (average) walled pipe almost exclusively in seamless. Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse effect on low-temperature impact properties. A333 pipe is furnished to nine different grades designated by numbers 1, 3, 4, 6, 7, 8, 9, 10, & 11. Discussed herein are Grades 1 and 6.
ASTM A333 is the Standard Specification Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness in NPS 1/8 to NPS 48 (DN 6 to DN 1200)
AN Steel Supply supplies a full range of ASTM A333 Grade 6 (ASME S/A 333 Grade 6)
ASTM A333/ASME SA333 Grade 6 CS Seamless Pipes, ASTM A333 Low Temperature Tubes Up To 24” Available for Immediate Supply
Buy High Quality ASTM A333 Grade 6, Low Temperature Tubes With Mill Certification – Exports is Our Specialty!
ASTM A333 covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.
Chemical Requirements of A333 Grade 6 Pipes
Composition, % |
| ||
Element | Grade 1 | Grade 3 | Grade 6 |
Carbon, max | 0.30 | 0.19 | 0.30 |
Manganese | 0.40 – 1.06 | 0.31 – 0.64 | 0.29 – 1.06 |
Phosphorous, max | 0.025 | 0.025 | 0.025 |
Sulfur, max | 0.025 | 0.025 | 0.025 |
Silicon | 0.18 -0.37 | 0.10 min | |
Nickel | 3.18 – 3.82 | ||
For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese. When Grade 6 is ordered under this specification, supplying an alloy grade that specifically requires the addition of any element other than those listed for the ordered grade is not permitted. However, the addition of elements required for the deoxidation of the steel is permitted.
Tensile Requirements of A333 Grade 6 Pipe
The material shall conform to the requirements as proscribed:
Grade 1 | Grade 3 | Grade 6 | |||||
psi | MPa | psi | MPa | psi | MPa | ||
Tensile Strength, min | 55,000 | 380 | 65,000 | 450 | 60,000 | 415 | |
Yield Strength, min | 30,000 | 205 | 35,000 | 240 | 35,000 | 240 | |
Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | ||
Elongation in 2 in. or 50 mm, (or 4D), min, %: | |||||||
Basic minimum elongation for walls 5/16 in. [8 mm] and over in thickness, strip tests, and for all small sizes tested in full section | 35 | 35 | 30 | 20 | 30 | 16.5 | |
When the standard round 2-in. or 50-mm gage length or proportionally smaller size test specimen with the gage length equal to 4D (4 times the diameter) is used | 28 | 20 | 22 | 14 | 22 | 12 | |
For strip tests, a deduction for each 1/32in. [0.8 mm] decrease in wall thickness below 5/16 in. [8 mm] from the basic minimum elongation of the following percentage | 1.75 | 1.25 | 1.50 | 1.00 | 1.50 | 1.00 | |
Elongation in 2 in. or 50 mm, min, %: | |||||||
Wall Thickness | Grade 1 | Grade 3 | Grade 6 | ||||
in. | mm | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse |
5/16 (0.312) | 8 | 35 | 25 | 30 | 20 | 30 | 16 |
9/32 (.281) | 7.2 | 33 | 24 | 28 | 19 | 28 | 15 |
1/4 (.250) | 6.4 | 32 | 23 | 27 | 18 | 27 | 15 |
7/32 (.219) | 5.6 | 30 | 26 | 26 | |||
3/16 (.188) | 4.8 | 28 | 24 | 24 | |||
5/32 (.156) | 4 | 26 | 22 | 22 | |||
1/8 (.125) | 3.2 | 25 | 21 | 21 | |||
3/32 (.094) | 2.4 | 23 | 20 | 20 | |||
1/16 (.063) | 1.6 | 21 | 18 | 18 | |||
Impact Requirements
For Grades 1, 3 and 6, the notched-bar impact properties of each set of three impact specimens, including specimens for the welded joint in welded pipe with wall thicknesses of 0.120 in. [3 mm] and larger, shall not be less than the values prescribed:
Size of Specimen, min | Minimum Average Notched Bar Impact Value of Each Set of Three Specimens | Minimum Notched Bar Impact Value of One Specimen Only of a Set |
| Impact Temperature | ||||
| ft-lbf | J | ft-lbf | J |
| Grade | Min Impact | |
10 by 10 | 13 | 18 | 10 | 14 | F | C | ||
10 by 7.5 | 10 | 14 | 8 | 11 | 1 | -50 | -45 | |
10 by 6.67 | 9 | 12 | 7 | 9 | 3 | -150 | -100 | |
10 by 5 | 7 | 9 | 5 | 7 | 6 | -50 | -45 | |
10 by 3.33 | 5 | 7 | 3 | 4 | ||||
10 by 2.5 | 4 | 5 | 3 | 4 |
| |||
Mechanical Testing
Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested. For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe. Hydrostatic Test Impact Test One notched bar impact test, consisting of breaking three specimens shall be made from each heat represtented in a heat-treatment load on specimens taken from the finished pipe.
ASTM A333 Grade 6 Steel Pipes, ASTM A333 Low Temperature Grade 6 Steel Tubes Specifications, Stock and Supply Range
ASTM A333 Grade 6 Carbon Steel Pipes
- Size Range: 1/2” NB to 36” NB
- Thickness: SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
- Applications: Oil Refineries, Petrochemicals, Power Generation (Nuclear/Thermal), Steel, Sugar, Boiler Equipments, Pressure Vessels and General Engineering Purposes
End Connections for Line Pipes: Plain, Bevel, Screwed, Threaded
Type: Seamless / ERW / Welded / Fabricated / CDW
Form: Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes
Length: Single Random, Double Random & Required Length, Custom Size – 12 Meter lengths
End: Plain End, Beveled End, Treaded
End Protection: Plastic Caps
Outside Coating: Black Painting, Anti-Corrosion Oil, Galvanised Finish, Finish as per customer Requirements
Inspection, Test Reports: Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports, India Boiler Regulations (IBR) Test Certificate
Packing: Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests
Specials: Sizes and Specifications other than above can be supplies and stock of on request
Applications of ASTM A333 Grade 6 Carbon Steel Pipes in Seamless & Welded Form
- Refineries
- Power Plants
- Boilers
- Ship Building
- Heat Exchangers
- Condensers
- Paper & Pulp
- Marine Applications
- Nuclear Power
- Fossil Fuel Power Plants
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