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Manufacturer, Supplier & Exporter of A333 GR. 3/ GR. 6 Carbon Steel Pipes, ASTM A333 Pipes, A333 GR 3 Pipes, ASTM A333 GR 6 in India.
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Grades: Type A106 GR. B | Type API 5L | Type ASTM A53  | Type ASTM A 333 

ASTM A333 CARBON STEEL SEAMLESS PIPES FOR LOW TEMPERATURE SERVICE

This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several  grades of  steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect in low-temperature impact properties.Supplementary Requirement S1 of an optional nature is provided. This shall apply only when specified by the purchaser.

The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

This specification covers nominal (average) wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. Several grades of ferritic steel are included. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.


Chemical Requirements:

 

 

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.


Tensile Requirements:

 

 

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, %:


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

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

10 by 7.5

10

14

8

11

1

-50

10 by 6.67

9

12

7

9

3

-150

10 by 5

7

9

5

7

6

-50

10 by 3.33

5

7

3

4

10 by 2.5

4

5

3

4




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.




 
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