ASTM A333 carbon and alloy steel pipe

ASTM A333 Steel Pipe for Sale

ASTM A333 (ASME S/A-333) pipe grades permit low temperature service. This specification covers nominal 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, 3 and 6.

Chemical Composition of ASTM A333
ASTM A333 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.

Mechanical Properties of ASTM A333
ASTM A333 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 of ASTM A333 Pipe
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 Test Temp
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      

If you are interested in other boiler steel tube, please click SA210, SA213, SA106, SA333, SA335, SA192, A53, A252, A106, EN10216, DIN17175, JIS G 3461, GB3087, GB5310.

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