ASTM A333

ASTM A333 – Seamless and Welded Steel Pipe for Low Temperature Service

Chemical Requirements  (max, %)

GradeCMnPSSiNiCrCuAlVNbMoCo
1 (Note)0.300.40-1.060.0250.025
30.190.31-0.640.0250.0250.18-0.373.18-3.82
40.120.50-1.050.0250.0250.08-0.370.47-0.980.44-1.010.40-0.750.04-0.30
6 (Note)0.300.29-1.060.0250.025≥0.10
70.190.900.0250.0250.13-0.322.03-2.57
80.130.900.0250.0250.13-0.328.40-9.60
90.200.40-1.060.0250.0251.60-2.240.75-1.25
100.201.15-1.500.0250.0250.10-0.350.250.150.150.060.120.050.05
110.100.600.0250.0250.3535.0-37.00.500.050.05

Note: 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.

 

Tensile Requirements

Grade 1Grade 3 Grade 4 Grade 6
Tensile strength, min, psi [MPa]55000 [380]65000 [450]60000 [415]60000 [415]
Yield strength, min, psi [MPa]30000 [205]35000 [240]35000 [240]35000 [240]
Elongation in 2 in. [50 mm], min, %:Longi-tudinalTrans-verseLongi-tudinalTrans-verseLongi-tudinalTrans-verseLongi-tudinalTrans-verse
352530203016.53016.5
Tensile Requirements Grade 7 Grade 8 Grade 9 Grade 10 Grade 11
Tensile strength, min, psi [MPa]65000 [450]1000000 [690]63000 [435]80000 [550]65000 [450]
Yield strength, min, psi [MPa]35000 [240]75000 [515]46000 [315]65000 [450]35000 [240]
Elongation in 2 in. [50 mm], min, %:Longi-tudinalTrans-verseLongi-tudinalTrans-verseLongi-tudinalTrans-verseLongi-tudinalTrans-verseLongitudinal
302222282218 (Note)

(Note) Elongation of Grade 11 is for all walls and small sizes tested in full section.

 

Minimum Impact Test Temperature

Grade°F°C
1−50−45
3−150−100
4−150−100
6−50−45
7−100−75
8−320−195
9−100−75
10−75−60

Impact Requirements for Grades 1, 3, 4, 6, 7, 9, and 10

Size of Specimen, mmMinimum Average Notched Bar Impact Value of Each Set of Three SpecimensAMinimum Notched Bar Impact Value of One Specimen Only of a SetA
ft·lbfJft·lbfJ
10 × 1013181014
10 × 7.51014811
10 × 6.671279
10 × 57957
10 ×3.335734
10 × 2.54534

A) Straight line interpolation for intermediate values is permitted.