ASTM A672 Welded Pipes
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This specification covers steel pipe; electricfusionwelded with filler metal added, fabricated from pressure vessel quality plate of any of several analyses and strength levels and suitable for highpressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.
Carbon Steel A672  Characteristics
 High Pressure Service
 Operating at moderate temperature
 Thinner wall thickness and better workability
Class Designation
Class  Heat Treatment  Class  Heat Treatment 
10  none  32  normalized 
11  none  33  normalized 
12  none  40  normalized and tempered 
13  none  41  normalized and tempered 
20  stress relieved  42  normalized and tempered 
21  stress relieved  43  normalized and tempered 
22  stress relieved  50  quenched and tempered 
23  stress relieved  51  quenched and tempered 
30  normalized  52  quenched and tempered 
31  normalized  53  quenched and tempered 
Plate Specification
Pipe Grade  Type of Steel  ASTM Specification  
No.  Grade  
A 45  plain carbon  A285/A285M  Gr C 
A 50  plain carbon  A515/A515M  Gr 60 
A 55  plain carbon  A515/A515M  Gr 65 
B 60  plain carbon, killed  A515/A515M  Gr 70 
B 65  plain carbon, killed  A516/A516M  Gr 60 
B70  plain carbon, killed  A516/A516M  Gr 65 
C 55  plain carbon, killed, fine grain  A516/A516M  Gr 70 
C 60  plain carbon, killed, fine grain  A537/A537M  Cl 1 
C 65  plain carbon, killed, fine grain  A537/A537M  Cl 2 
C 70  plain carbon, killed, fine grain  A203/A203M  Gr A 
D 70  manganesesiliconnormalized  A203/A203M  Gr B 
D 80  manganesesiliconquenched and tempered  A203/A203M  Gr D 
H 75  manganesemolybdenumnormalized  A203/A203M  Gr E 
H 80  manganesemolybdenumnormalized  A353/A353M  
J 80  manganesemolybdenumquenched and tempered  A553/A553M  Type 1 
J 90  manganesemolybdenumquenched and tempered  A517/A517M  Gr A 
J 100  manganesemolybdenumquenched and tempered  A517/A517M  Gr B 
L 65  molybdenum  A517/A517M  Gr E 
L 70  molybdenum  A517/A517M  Gr F 
L 75  molybdenum  A517/A517M  Gr H 
N 75  molybdenumsilicon  A517/A517M  Gr P 
Supplementary Requirements
S1. Tension and Bend Tests
S2. Charpy VNotch Test (For pipe with nominal wall thickness 1/2 in. [13mm] and greater) (As per A20/20M)
Acceptance Criteria Charpy VNotch  Specification and Grade  Test Temperature, °C for plate Thickness (Unless Otherwise Agreed Upon)  
Energy Absorption  
ClassA  Min. Avg for 3 SpecimenB  Min For 1 SpecimenB  25 mm and under  Over 25 mm to 50 mm, incl  Over 50 mm to 75 mm, incl  Over 75 mm to 125 mm, incl 

J  J  
I  14  10  A285 Grade A  +4  +16     
A285 Grade B  +10  +21      
A285 Grade C  +16  +27      
II  18  14  A455  4       
III  18  14  A203 Grade A  68  68  60   
A203 Grade D  101  101  87    
A516 Grade 55  51  51  46  46  
A516 Grade 60  51  46  46  46  
A516 Grade 65  51  56  40  32  
IV  20  16  A203 Grade B  68  68  60   
A203 Grade E  101  101  87    
A203 Grade F (100 mm max)      107  107  
A516 Grade 70  46  40  35  29  
A537 Class 1 (64 mm max)  62  60  60    
A537 Class 2 (Over 64100 mm)  
V  27  20  A203 Grade F  107  107     
Lateral Expansion mm, Minimum Each Specimen Transverse Test  
VI  0.38  A353  196  196      
A553 Type I  196  196      
A553 Type II  170  170      
A517 all (64 mm max thickness)  C  C     
A Class I is Other Than Killed with a specified minimum tensile strength of 450 MPa or lower.
Class II is Other Than Killed with a specified minimum tensile strength of 450 to 520 MPa incl.
Class III is Killed with a specified minimum tensile strength of 450 MPa or lower.
Class IV is Killed with a specified minimum tensile strength of 450 to 520 MPa incl.
Class V is Killed with a specified minimum tensile strength of over 520 MPa to but not including 655 MPa.
Class VI is Killed with a specified minimum tensile strength of 655 MPa or over.
B Full size (10 by 10 mm) specimens.
C Testing temperature as specified in the purchase order, but no higher than 0°C
S3. Hardness Test
S4. Product Analysis
S5. Metallography
S6. Magnetic Particle Examination of Base Metal
S7. Magnetic Particle Examination of Weld Metal
S8. Liquid Penetrant Examination of Base Metal
S9. Liquid Penetrant Examination of Weld Metal
S10. Staight Beam Ultrasonic Examination of Flat Plate  UT 1
S11. Staight Beam Ultrasonic Examination of Flat Plate  UT 2
S12. Angle Beam Ultrasonic Examination (Plate Less than 2 in. [50mm] Thick)  UT 3
S13. Repair Welding
S14. Description of Term
ASTM A672 A 45 Class 10  ASTM A672 A 50 Class 10  ASTM A672 A 55 Class 10  ASTM A672 B 60 Class 10  ASTM A672 B 65 Class 10  ASTM A672 B 70 Class 10  ASTM A672 C 55 Class 10 
ASTM A672 A 45 Class 11  ASTM A672 A 50 Class 11  ASTM A672 A 55 Class 11  ASTM A672 B 60 Class 11  ASTM A672 B 65 Class 11  ASTM A672 B 70 Class 11  ASTM A672 C 55 Class 11 
ASTM A672 A 45 Class 12  ASTM A672 A 50 Class 12  ASTM A672 A 55 Class 12  ASTM A672 B 60 Class 12  ASTM A672 B 65 Class 12  ASTM A672 B 70 Class 12  ASTM A672 C 55 Class 12 
ASTM A672 A 45 Class 13  ASTM A672 A 50 Class 13  ASTM A672 A 55 Class 13  ASTM A672 B 60 Class 13  ASTM A672 B 65 Class 13  ASTM A672 B 70 Class 13  ASTM A672 C 55 Class 13 
ASTM A672 A 45 Class 20  ASTM A672 A 50 Class 20  ASTM A672 A 55 Class 20  ASTM A672 B 60 Class 20  ASTM A672 B 65 Class 20  ASTM A672 B 70 Class 20  ASTM A672 C 55 Class 20 
ASTM A672 A 45 Class 21  ASTM A672 A 50 Class 21  ASTM A672 A 55 Class 21  ASTM A672 B 60 Class 21  ASTM A672 B 65 Class 21  ASTM A672 B 70 Class 21  ASTM A672 C 55 Class 21 
ASTM A672 A 45 Class 22  ASTM A672 A 50 Class 22  ASTM A672 A 55 Class 22  ASTM A672 B 60 Class 22  ASTM A672 B 65 Class 22  ASTM A672 B 70 Class 22  ASTM A672 C 55 Class 22 
ASTM A672 A 45 Class 23  ASTM A672 A 50 Class 23  ASTM A672 A 55 Class 23  ASTM A672 B 60 Class 23  ASTM A672 B 65 Class 23  ASTM A672 B 70 Class 23  ASTM A672 C 55 Class 23 
ASTM A672 A 45 Class 30  ASTM A672 A 50 Class 30  ASTM A672 A 55 Class 30  ASTM A672 B 60 Class 30  ASTM A672 B 65 Class 30  ASTM A672 B 70 Class 30  ASTM A672 C 55 Class 30 
ASTM A672 A 45 Class 31  ASTM A672 A 50 Class 31  ASTM A672 A 55 Class 31  ASTM A672 B 60 Class 31  ASTM A672 B 65 Class 31  ASTM A672 B 70 Class 31  ASTM A672 C 55 Class 31 
ASTM A672 A 45 Class 32  ASTM A672 A 50 Class 32  ASTM A672 A 55 Class 32  ASTM A672 B 60 Class 32  ASTM A672 B 65 Class 32  ASTM A672 B 70 Class 32  ASTM A672 C 55 Class 32 
ASTM A672 A 45 Class 33  ASTM A672 A 50 Class 33  ASTM A672 A 55 Class 33  ASTM A672 B 60 Class 33  ASTM A672 B 65 Class 33  ASTM A672 B 70 Class 33  ASTM A672 C 55 Class 33 
ASTM A672 A 45 Class 40  ASTM A672 A 50 Class 40  ASTM A672 A 55 Class 40  ASTM A672 B 60 Class 40  ASTM A672 B 65 Class 40  ASTM A672 B 70 Class 40  ASTM A672 C 55 Class 40 
ASTM A672 A 45 Class 41  ASTM A672 A 50 Class 41  ASTM A672 A 55 Class 41  ASTM A672 B 60 Class 41  ASTM A672 B 65 Class 41  ASTM A672 B 70 Class 41  ASTM A672 C 55 Class 41 
ASTM A672 A 45 Class 42  ASTM A672 A 50 Class 42  ASTM A672 A 55 Class 42  ASTM A672 B 60 Class 42  ASTM A672 B 65 Class 42  ASTM A672 B 70 Class 42  ASTM A672 C 55 Class 42 
ASTM A672 A 45 Class 43  ASTM A672 A 50 Class 43  ASTM A672 A 55 Class 43  ASTM A672 B 60 Class 43  ASTM A672 B 65 Class 43  ASTM A672 B 70 Class 43  ASTM A672 C 55 Class 43 
ASTM A672 A 45 Class 50  ASTM A672 A 50 Class 50  ASTM A672 A 55 Class 50  ASTM A672 B 60 Class 50  ASTM A672 B 65 Class 50  ASTM A672 B 70 Class 50  ASTM A672 C 55 Class 50 
ASTM A672 A 45 Class 51  ASTM A672 A 50 Class 51  ASTM A672 A 55 Class 51  ASTM A672 B 60 Class 51  ASTM A672 B 65 Class 51  ASTM A672 B 70 Class 51  ASTM A672 C 55 Class 51 
ASTM A672 A 45 Class 52  ASTM A672 A 50 Class 52  ASTM A672 A 55 Class 52  ASTM A672 B 60 Class 52  ASTM A672 B 65 Class 52  ASTM A672 B 70 Class 52  ASTM A672 C 55 Class 52 
ASTM A672 A 45 Class 53  ASTM A672 A 50 Class 53  ASTM A672 A 55 Class 53  ASTM A672 B 60 Class 53  ASTM A672 B 65 Class 53  ASTM A672 B 70 Class 53  ASTM A672 C 55 Class 53 
ASTM A672 C 60 Class 10  ASTM A672 C 65 Class 10  ASTM A672 C 70 Class 10  ASTM A672 D 70 Class 10  ASTM A672 D 80 Class 10  ASTM A672 H 75 Class 10  ASTM A672 H 80 Class 10 
ASTM A672 C 60 Class 11  ASTM A672 C 65 Class 11  ASTM A672 C 70 Class 11  ASTM A672 D 70 Class 11  ASTM A672 D 80 Class 11  ASTM A672 H 75 Class 11  ASTM A672 H 80 Class 11 
ASTM A672 C 60 Class 12  ASTM A672 C 65 Class 12  ASTM A672 C 70 Class 12  ASTM A672 D 70 Class 12  ASTM A672 D 80 Class 12  ASTM A672 H 75 Class 12  ASTM A672 H 80 Class 12 
ASTM A672 C 60 Class 13  ASTM A672 C 65 Class 13  ASTM A672 C 70 Class 13  ASTM A672 D 70 Class 13  ASTM A672 D 80 Class 13  ASTM A672 H 75 Class 13  ASTM A672 H 80 Class 13 
ASTM A672 C 60 Class 20  ASTM A672 C 65 Class 20  ASTM A672 C 70 Class 20  ASTM A672 D 70 Class 20  ASTM A672 D 80 Class 20  ASTM A672 H 75 Class 20  ASTM A672 H 80 Class 20 
ASTM A672 C 60 Class 21  ASTM A672 C 65 Class 21  ASTM A672 C 70 Class 21  ASTM A672 D 70 Class 21  ASTM A672 D 80 Class 21  ASTM A672 H 75 Class 21  ASTM A672 H 80 Class 21 
ASTM A672 C 60 Class 22  ASTM A672 C 65 Class 22  ASTM A672 C 70 Class 22  ASTM A672 D 70 Class 22  ASTM A672 D 80 Class 22  ASTM A672 H 75 Class 22  ASTM A672 H 80 Class 22 
ASTM A672 C 60 Class 23  ASTM A672 C 65 Class 23  ASTM A672 C 70 Class 23  ASTM A672 D 70 Class 23  ASTM A672 D 80 Class 23  ASTM A672 H 75 Class 23  ASTM A672 H 80 Class 23 
ASTM A672 C 60 Class 30  ASTM A672 C 65 Class 30  ASTM A672 C 70 Class 30  ASTM A672 D 70 Class 30  ASTM A672 D 80 Class 30  ASTM A672 H 75 Class 30  ASTM A672 H 80 Class 30 
ASTM A672 C 60 Class 31  ASTM A672 C 65 Class 31  ASTM A672 C 70 Class 31  ASTM A672 D 70 Class 31  ASTM A672 D 80 Class 31  ASTM A672 H 75 Class 31  ASTM A672 H 80 Class 31 
ASTM A672 C 60 Class 32  ASTM A672 C 65 Class 32  ASTM A672 C 70 Class 32  ASTM A672 D 70 Class 32  ASTM A672 D 80 Class 32  ASTM A672 H 75 Class 32  ASTM A672 H 80 Class 32 
ASTM A672 C 60 Class 33  ASTM A672 C 65 Class 33  ASTM A672 C 70 Class 33  ASTM A672 D 70 Class 33  ASTM A672 D 80 Class 33  ASTM A672 H 75 Class 33  ASTM A672 H 80 Class 33 
ASTM A672 C 60 Class 40  ASTM A672 C 65 Class 40  ASTM A672 C 70 Class 40  ASTM A672 D 70 Class 40  ASTM A672 D 80 Class 40  ASTM A672 H 75 Class 40  ASTM A672 H 80 Class 40 
ASTM A672 C 60 Class 41  ASTM A672 C 65 Class 41  ASTM A672 C 70 Class 41  ASTM A672 D 70 Class 41  ASTM A672 D 80 Class 41  ASTM A672 H 75 Class 41  ASTM A672 H 80 Class 41 
ASTM A672 C 60 Class 42  ASTM A672 C 65 Class 42  ASTM A672 C 70 Class 42  ASTM A672 D 70 Class 42  ASTM A672 D 80 Class 42  ASTM A672 H 75 Class 42  ASTM A672 H 80 Class 42 
ASTM A672 C 60 Class 43  ASTM A672 C 65 Class 43  ASTM A672 C 70 Class 43  ASTM A672 D 70 Class 43  ASTM A672 D 80 Class 43  ASTM A672 H 75 Class 43  ASTM A672 H 80 Class 43 
ASTM A672 C 60 Class 50  ASTM A672 C 65 Class 50  ASTM A672 C 70 Class 50  ASTM A672 D 70 Class 50  ASTM A672 D 80 Class 50  ASTM A672 H 75 Class 50  ASTM A672 H 80 Class 50 
ASTM A672 C 60 Class 51  ASTM A672 C 65 Class 51  ASTM A672 C 70 Class 51  ASTM A672 D 70 Class 51  ASTM A672 D 80 Class 51  ASTM A672 H 75 Class 51  ASTM A672 H 80 Class 51 
ASTM A672 C 60 Class 52  ASTM A672 C 65 Class 52  ASTM A672 C 70 Class 52  ASTM A672 D 70 Class 52  ASTM A672 D 80 Class 52  ASTM A672 H 75 Class 52  ASTM A672 H 80 Class 52 
ASTM A672 C 60 Class 53  ASTM A672 C 65 Class 53  ASTM A672 C 70 Class 53  ASTM A672 D 70 Class 53  ASTM A672 D 80 Class 53  ASTM A672 H 75 Class 53  ASTM A672 H 80 Class 53 
ASTM A672 J 80 Class 10  ASTM A672 J 90 Class 10  ASTM A672 J 100 Class 10  ASTM A672 L65 Class 10  ASTM A672 L70 Class 10  ASTM A672 L75 Class 10  ASTM A672 N 75 Class 10 
ASTM A672 J 80 Class 11  ASTM A672 J 90 Class 11  ASTM A672 J 100 Class 11  ASTM A672 L65 Class 11  ASTM A672 L70 Class 11  ASTM A672 L75 Class 11  ASTM A672 N 75 Class 11 
ASTM A672 J 80 Class 12  ASTM A672 J 90 Class 12  ASTM A672 J 100 Class 12  ASTM A672 L65 Class 12  ASTM A672 L70 Class 12  ASTM A672 L75 Class 12  ASTM A672 N 75 Class 12 
ASTM A672 J 80 Class 13  ASTM A672 J 90 Class 13  ASTM A672 J 100 Class 13  ASTM A672 L65 Class 13  ASTM A672 L70 Class 13  ASTM A672 L75 Class 13  ASTM A672 N 75 Class 13 
ASTM A672 J 80 Class 20  ASTM A672 J 90 Class 20  ASTM A672 J 100 Class 20  ASTM A672 L65 Class 20  ASTM A672 L70 Class 20  ASTM A672 L75 Class 20  ASTM A672 N 75 Class 20 
ASTM A672 J 80 Class 21  ASTM A672 J 90 Class 21  ASTM A672 J 100 Class 21  ASTM A672 L65 Class 21  ASTM A672 L70 Class 21  ASTM A672 L75 Class 21  ASTM A672 N 75 Class 21 
ASTM A672 J 80 Class 22  ASTM A672 J 90 Class 22  ASTM A672 J 100 Class 22  ASTM A672 L65 Class 22  ASTM A672 L70 Class 22  ASTM A672 L75 Class 22  ASTM A672 N 75 Class 22 
ASTM A672 J 80 Class 23  ASTM A672 J 90 Class 23  ASTM A672 J 100 Class 23  ASTM A672 L65 Class 23  ASTM A672 L70 Class 23  ASTM A672 L75 Class 23  ASTM A672 N 75 Class 23 
ASTM A672 J 80 Class 30  ASTM A672 J 90 Class 30  ASTM A672 J 100 Class 30  ASTM A672 L65 Class 30  ASTM A672 L70 Class 30  ASTM A672 L75 Class 30  ASTM A672 N 75 Class 30 
ASTM A672 J 80 Class 31  ASTM A672 J 90 Class 31  ASTM A672 J 100 Class 31  ASTM A672 L65 Class 31  ASTM A672 L70 Class 31  ASTM A672 L75 Class 31  ASTM A672 N 75 Class 31 
ASTM A672 J 80 Class 32  ASTM A672 J 90 Class 32  ASTM A672 J 100 Class 32  ASTM A672 L65 Class 32  ASTM A672 L70 Class 32  ASTM A672 L75 Class 32  ASTM A672 N 75 Class 32 
ASTM A672 J 80 Class 33  ASTM A672 J 90 Class 33  ASTM A672 J 100 Class 33  ASTM A672 L65 Class 33  ASTM A672 L70 Class 33  ASTM A672 L75 Class 33  ASTM A672 N 75 Class 33 
ASTM A672 J 80 Class 40  ASTM A672 J 90 Class 40  ASTM A672 J 100 Class 40  ASTM A672 L65 Class 40  ASTM A672 L70 Class 40  ASTM A672 L75 Class 40  ASTM A672 N 75 Class 40 
ASTM A672 J 80 Class 41  ASTM A672 J 90 Class 41  ASTM A672 J 100 Class 41  ASTM A672 L65 Class 41  ASTM A672 L70 Class 41  ASTM A672 L75 Class 41  ASTM A672 N 75 Class 41 
ASTM A672 J 80 Class 42  ASTM A672 J 90 Class 42  ASTM A672 J 100 Class 42  ASTM A672 L65 Class 42  ASTM A672 L70 Class 42  ASTM A672 L75 Class 42  ASTM A672 N 75 Class 42 
ASTM A672 J 80 Class 43  ASTM A672 J 90 Class 43  ASTM A672 J 100 Class 43  ASTM A672 L65 Class 43  ASTM A672 L70 Class 43  ASTM A672 L75 Class 43  ASTM A672 N 75 Class 43 
ASTM A672 J 80 Class 50  ASTM A672 J 90 Class 50  ASTM A672 J 100 Class 50  ASTM A672 L65 Class 50  ASTM A672 L70 Class 50  ASTM A672 L75 Class 50  ASTM A672 N 75 Class 50 
ASTM A672 J 80 Class 51  ASTM A672 J 90 Class 51  ASTM A672 J 100 Class 51  ASTM A672 L65 Class 51  ASTM A672 L70 Class 51  ASTM A672 L75 Class 51  ASTM A672 N 75 Class 51 
ASTM A672 J 80 Class 52  ASTM A672 J 90 Class 52  ASTM A672 J 100 Class 52  ASTM A672 L65 Class 52  ASTM A672 L70 Class 52  ASTM A672 L75 Class 52  ASTM A672 N 75 Class 52 
ASTM A672 J 80 Class 53  ASTM A672 J 90 Class 53  ASTM A672 J 100 Class 53  ASTM A672 L65 Class 53  ASTM A672 L70 Class 53  ASTM A672 L75 Class 53  ASTM A672 N 75 Class 53 