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ASTM A333 Low Temperature Steel Pipe

Date:2018-04-02    View:498      Tag:ASTM A333 Low Temperature Steel Pipe

ASTM A333 standard specification for seamless and welded steel pipe for low-temperature service and other applications with required notch toughness.

This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. 

Chemical Requirements of 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


Tensile Requirements of ASTM A333

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
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



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 -

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