ASTM A333

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

Chemical Compositions, max ,%

Grade C Mn P S Si Ni Cr Cu Al V Nb Mo Co

1 (Note) 0.30 0.40-1.06 0.025 0.025 … … … … … … … … …

3 0.19 0.31-0.64 0.025 0.025 0.18-0.37 3.18-3.82 … … … … … … …

4 0.12 0.50-1.05 0.025 0.025 0.08-0.37 0.47-0.98 0.44-1.01 0.40-0.75 0.04-0.30 … … … …

6 (Note) 0.30 0.29-1.06 0.025 0.025 ≥0.10 … … … … … … … …

7 0.19 0.90 0.025 0.025 0.13-0.32 2.03-2.57 … … … … … … …

8 0.13 0.90 0.025 0.025 0.13-0.32 8.40-9.60 … … … … … … …

9 0.20 0.40-1.06 0.025 0.025 … 1.60-2.24 … 0.75-1.25 … … … … …

10 0.20 1.15-1.50 0.025 0.025 0.10-0.35 0.25 0.15 0.15 0.06 0.12 0.05 0.05 …

11 0.10 0.60 0.025 0.025 0.35 35.0-37.0 0.50 … … … … 0.05 0.05

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	Tensile strength, min, psi [MPa]	Yield strength, min, psi [MPa]	Elongation in 2 in. [50 mm], min, %:
Grade	Tensile strength, min, psi [MPa]	Yield strength, min, psi [MPa]	Longitudinal	Transverse
1	55 000 [380]	30 000 [205]	35	25
3	65 000 [450]	35 000 [240]	30	20
4	60 000 [415]	35 000 [240]	30	16.5
6	60 000 [415]	35 000 [240]	30	16.5
7	65 000 [450]	35 000 [240]	30	22
8	100 0000 [690]	75 000 [515]	22	…
9	63 000 [435]	46 000 [315]	28	…
10	80 000 [550]	65 000 [450]	22	…
11	65 000 [450]	35 000 [240]	18 (Note)	…

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

Impact Requirements

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, mm	Minimum Average Notched Bar Impact Value of Each Set of Three Specimens		Minimum Notched Bar Impact Value of One Specimen Only of a Set
Size of Specimen, mm	ft·lbf	J	ft·lbf	J
10 × 10	13	18	10	14
10 × 7.5	10	14	8	11
10 × 6.6	7	12	7	9
10 × 5	7	9	5	7
10 ×3.33	5	7	3	4
10 × 2.5	4	5	3	4