astm-a333-steel PIPE

Technical data

1. ASTM A333 Chemical Composition Requirements

Chemical Composition of ASTM A333
Element	Grade 1, %	Grade 3, %	Grade 4, %	Grade 6, %	Grade 7, %	Grade 8, %	Grade 9, %	Grade 10, %	Grade 11, %
C	0.30	0.19	0.12	0.30	0.19	0.13	0.20	0.20	0.10
Mn	0.40–1.06	0.31–0.64	0.50–1.05	0.29–1.06	0.90	0.90	0.40–1.06	1.15–1.50	0.60
P	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.035	0.025
S	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.015	0.025
Si	...	0.18–0.37	0.08–0.37	0.10 min	0.13–0.32	0.13–0.32	...	0.10–0.35	0.35
Ni	...	3.18–3.82	0.47–0.98	0.40	2.03–2.57	8.40–9.60	1.60–2.24	0.25	35.0–37.0
Cr	...	...	0.44–1.01	0.30	...	...	...	0.15	0.50
Cu	...	...	0.40–0.75	0.40	...	...	0.75–1.25	0.15	...
Al	...	...	0.04–0.30	...	...	...	...	0.06	...
V	...	...	...	0.08	...	...	...	0.12	...
Cb	...	...	...	0.02	...	...	...	0.05	...
Mo	...	...	...	0.12	...	...	...	0.05	0.50
Co	...	...	...	...	...	...	...	...	0.50

*For Grade 1 and 6, each reduction of 0.01% C below 0.30%, an increase of 0.05 % Mn above 1.06 % would be permitted to a max. of 1.35%.
*For Grade 6, the limit for columbium may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.
*Generally, the carbon equivalent C.E = [C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15] shall not exceed 0.43% by heat analysis.

2. ASTM A333 Mechanical Properties

ASTM A333	Tensile Strength, min.		Yield Strength, min.		Elongation %, min.
Grade	psi	MPa	psi	MPa	Longitudinal	Transverse
Grade 1	55 000	380	30 000	205	35	25
Grade 3	65 000	450	35 000	240	30	20
Grade 4	60 000	415	35 000	240	30	16.5
Grade 6	60 000	415	35 000	240	30	16.5
Grade 7	65 000	450	35 000	240	30	22
Grade 8	100 000	690	75 000	515	22	...
Grade 9	63 000	435	46 000	315	28	...
Grade 10	80 000	550	65 000	450	22	...
Grade 11	65 000	450	35 000	240	18	...

*The elongation values are furnished on the basis of standard round 2 inch or 50 mm(or 4D) specimens.
*Elongation of Grade 11 is for all walls and small sizes tested in full section.

3. Charpy V-notch Impact Tests

Impact Requirements for Grades 1, 3, 4, 6, 7, 9, 10, and 11
Size of Specimen	*A		*B
mm	ft·lbf	J	ft·lbf	J
10 by 10	13	18	10	14
10 by 7.5	10	14	8	11
10 by 6.67	9	12	7	9
10 by 5	7	9	5	7
10 by 3.33	5	7	3	4
10 by 2.5	4	5	3	4

*A denotes minimum average notched bar impact value of each set of three specimens.
*B denotes minimum notched bar impact value of one specimen only of a set.

Minimum Impact Test Temperature of ASTM A333
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
11	-320	-195

* Impact tests speciﬁed for temperatures lower than 70 °F [20 °C] should be made with precautions.

4. Tensile Requirements

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	25	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

5. 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 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

6. 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 represented in a heat-treatment load on specimens taken from the finished pipe.

ASTM A333 STEEL PIPE