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ASTM A691/A691M

Date:2022-03-31View:289Tags:RHS section,Hollow section,A53 steel pipe

This specification coverscarbonandalloy steel pipe,electric-fusion-weldedwith filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures. Heat treatment may or may not be required to attain the desired mechanical properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired. The specification nominally covers pipe 16 in. [400 mm] in outside diameter and larger with wall thicknesses up to 3 in. [75 mm] inclusive. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification


Specification

Size

1/2” NB to 36” NB

Thickness

3-12mm

Schedules

SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Class Designation

Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50,
51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73

Tolerance

Cold drawn pipe: +/-0.1mm

Cold rolled pipe: +/-0.05mm

Craft

Cold rolled and Cold drawn

Type

Seamless / ERW / Welded / Fabricated / LSAW Pipes

available in Form of

Round, Square, Rectangular, Hydraulic Etc.

Length

Standard
Double &
In Cut length also.

End

Plain End, Beveled End, Treaded

Specialized in

Large Diameter ASTM A691 Pipe

Additional Testing

NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.

Application

Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service


Pipe Grades

Type of Steel

ASTM Grades

HB,maxA

CM-65

Carbon-Molybdenum Steel

A204/A204M Grade A

201

CM-70

Carbon-Molybdenum Steel

A204/A204M Grade B

201

CM-75

Carbon-Molybdenum Steel

A204/A204M Grade C

201

CMSH-70

Carbon-Manganese-Silicon Steel,Normalized

A537/A537M

-

CMS-75

Carbon-Manganese-Silicon Steel

A299/A299M

-

CMSH-80

Carbon-Manganese-Silicon Steel,Quenched and Tempered

A537/A537M Grade 2

-

1/2 CR

1/2 % Chromium,1/2 % Molybdenum Steel

A387/A387M Grade 2

201

1 CR

1 % Chromium,1/2 % Molybdenum Steel

A387/A387M Grade 12

201

1 1/4 CR

1 1/4 % Chromium,1/2 % Molybdenum Steel

A387/A387M Grade 11

201

2 1/4 CR

2 1/4 % Chromium,1 % Molybdenum Steel

A387/A387M Grade 22

201

3 CR

3 % Chromium,1 % Molybdenum Steel

A387/A387M Grade 21

201

5 CR

5 % Chromium,1/2 % Molybdenum Steel

A387/A387M Grade 5

225

9 CR

9 % Chromium,1/2 % Molybdenum Steel

A387/A387M Grade 9

241

91

9 % Chromium,1/2 % Molybdenum,Vanadium,Columbian

A387/A387M Grade 91

241


chemical composition

Chemical Composition of A691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91 Alloy STEEL EFW PIPEs

(cast analysis, % by mass, maximum permitted unless indicated otherwise)


1CR

1-1/4CR

2-1/4 CR

5 CR

9 CR

91

C

0.05-0.17

0.05-0.17

0.05-0.15

0.15

0.15

0.08-0.12

Mn

0.40-0.65

0.40-0.65

0.30-0.60

0.30-0.60

0.30-0.60

0.30-0.60

P

0.025

0.025

0.025

0.025

0.025

0.020

S

0.025

0.025

0.025

0.025

0.025

0.010

Si

0.15-0.40

0.50-0.80

0.50

0.50

1.00

0.20-0.50

Cr

0.80-1.15

1.00-1.50

2.00-2.50

4.00-6.00

8.00-10.00

8.00-9.50

Mo

0.45-0.60

0.45-0.65

0.90-1.10

0.45-0.65

0.90-1.10

0.85-1.05

V

0.04

0.18-0.25

*Grade 91 also includes restrictions on Nickel 0.40 max, Columbium 0.06-0.10, Nitrogen 0.030-0.070, Aluminium 0.02 max, titanium 0.01 max, Zirconium 0.01 max.

Mechanical properties

A691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91 Alloy Steel EFW LSAW Pipes Class

Class

Heat Treatment on Pipe Section see:

Radiography,
see Section

Pressure
Test, see :

10

none

none

none

11

none

9

none

12

none

9

8.3

13

none

none

8.3

21

stress relieved, see 6.3.1

none

none

21

stress relieved, see 6.3.1

9

none

22

stress relieved, see 6.3.1

9

8.3

23

stress relieved, see 6.3.1

none

8.3

31

normalized, see 6.3.2

none

none

31

normalized, see 6.3.2

9

none

32

normalized, see 6.3.2

9

8.3

33

normalized, see 6.3.2

none

8.3

40

normalized and tempered, see 6.3.3

none

none

43

normalized and tempered, see 6.3.3

9

none

43

normalized and tempered, see 6.3.3

9

8.3

43

normalized and tempered, see 6.3.3

none

8.3

50

quenched and tempered, see 6.3.4

none

none

51

quenched and tempered, see 6.3.4

9

none

52

quenched and tempered, see 6.3.4

9

8.3

53

quenched and tempered, see 6.3.4

none

8.3

60

normalized and precipitation heat none none treated

none

none

61

normalized and precipitation heat none none treated

9

none

62

normalized and precipitation heat none none treated

9

8.3

63

normalized and precipitation heat none none treated

none

8.3

70

normalized and precipitation heat none none treated

none

none

71

normalized and precipitation heat none none treated

9

none

72

normalized and precipitation heat none none treated

9

8.3

73

normalized and precipitation heat none none treated

none

8.3


Equivalent

Pipe Grade

Type of Steel

ASTM Specification

HB, max

Number

Grade

CM-65

carbon-molybdenum steel

A204/A204M

A

201

CM-70

carbon-molybdenum steel

A204/A204M

B

201

CM-75

carbon-molybdenum steel

A204/A204M

C

201

CMSH-70

carbon-manganese-silicon steel, normalized

A537/A537M

1

 

CMS-75

carbon-manganese-silicon steel

A299/A299M

CMSH-80

carbon-manganese-silicon steel, quenched and tempered

A537/A537M

2

 

1/2 CR

1/2 % chromium, 1/2 % molybdenum steel

A387/A387M

2

201

1 CR

1 % chromium, 1/2 % molybdenum steel

A387/A387M

12

201

1 1/4 CR

1 1/4 % chromium, 1/2 % molybdenum steel

A387/A387M

11

201

2 1/4 CR

2 1/4 % chromium, 1 % molybdenum steel

A387/A387M

22

201

3 CR

3 % chromium, 1 % molybdenum steel

A387/A387M

21

201

5 CR

5 % chromium, 1/2 % molybdenum steel

A387/A387M

5

225

9 CR

9 % chromium, 1 % molybdenum steel

A387/A387M

9

241

91

9 % chromium, 1 % molybdenum, vanadium, columbium

A387/A387M

91

241

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