ASTM A672 CB65 EFW pipe is made from ASTM A515 Grade 65 plate for high pressure service at moderate temperatures. Under ASTM A672, this strength level is designated as Grade B65, while CB65 is the A671 style designation commonly used by buyers. Amardeep Steel supplies this grade with complete plate and weld documentation. For the lower strength level, see our ASTM A672 CB60 pipes. For fine grain plate options, refer to our ASTM A672 C60, C65 and C70 pipes. You can also browse the complete ASTM A672 EFW pipe range. Every order includes plate and weld certificates, radiography reports for the specified class and full heat traceability.
Every order comes with plate and weld certificates, radiography reports for the ordered class and full heat traceability.
What Is ASTM A672 CB65 EFW Pipe?
ASTM A672 covers electric fusion welded steel pipe, made from pressure vessel plate with a filler metal weld, for high pressure service at moderate temperatures. The grade name tells you the plate: the letter is the plate family and the number is its minimum tensile strength in ksi.
A672 CB65 and B65: One Grade, Two Names
A672 names this grade B65: B for A515 plate and 65 for its tensile strength in ksi. ASTM A671 calls pipe from the same plate CB65. The plate and strength are the same; for A672 orders the certificate will show Grade B65.
ASTM A672 CB65 EFW Pipe Specifications
Parameter | Details |
|---|---|
Specification | ASTM A672 / ASME SA672 |
Grade | CB65 (listed in A672 as B65) |
Plate Material | ASTM A515 / A515M Grade 65 |
Manufacturing Process | Electric fusion welded (EFW) with filler metal, longitudinal seam |
Size Range | 16 inch (406 mm) OD and larger as standard, smaller sizes on request |
Wall Thickness | Up to 75 mm (3 inch) |
Common Classes | Class 12, 22 and 32 |
Length | Single random, double random and cut lengths |
Ends | Bevelled end or plain end |
Test Certificate | EN 10204 3.1, with 3.2 available on request |
ASTM A672 CB65 EFW Pipe Chemical Composition
Element (%) | B65 |
|---|---|
Carbon (C) | 0.28 max |
Manganese (Mn) | 0.90 max |
Phosphorus (P) | 0.025 max |
Sulfur (S) | 0.025 max |
Silicon (Si) | 0.15 to 0.40 |
Values are for plate up to 12.5 mm (A516) or 25 mm (A515) thick; thicker plate allows higher carbon. The weld deposit is analysed for every lot.
ASTM A672 CB65 EFW Pipe Mechanical Properties
Property | B65 |
|---|---|
Plate | A515 Grade 65 |
Tensile Strength | 450 to 585 MPa (65 to 85 ksi) |
Yield Strength, min | 240 MPa (35 ksi) |
Elongation in 50 mm, min | 23% |
A672 Pipe Classes Explained
Class (first digit) | Heat Treatment on Pipe | Class (second digit) | Weld Radiography and Pressure Test |
|---|---|---|---|
1x | None | x0 | Neither |
2x | Stress relieved | x1 | Radiography only |
3x | Normalized | x2 | Radiography and pressure test |
4x | Normalized and tempered | x3 | Pressure test only |
5x | Quenched and tempered |
Classes ending in 2 include full radiography and a hydrostatic test, which lets designers use a weld joint factor of 1.0 under ASME B31.3.
ASTM A672 Carbon Steel Grades Compared
Property | A55 | B60 | B65 | C60 | C65 |
|---|---|---|---|---|---|
Plate | A285 Gr C | A515 Gr 60 | A515 Gr 65 | A516 Gr 60 | A516 Gr 65 |
Grain Practice | Plain carbon | Coarse grain | Coarse grain | Fine grain | Fine grain |
Tensile Strength, MPa | 380 to 515 | 415 to 550 | 450 to 585 | 415 to 550 | 450 to 585 |
Yield Strength, min, MPa | 205 | 220 | 240 | 220 | 240 |
See our ASTM A672 A55 pipe for the lowest strength grade and our ASTM A672 C60, C65 and C70 pipes for fine grain plate.
Heat Treatment of ASTM A672 CB65 EFW Pipe
- Post weld heat treatment: 590 to 680 degrees Celsius (1100 to 1250 degrees Fahrenheit) for A515 and 590 to 650 degrees Celsius for A516 plate
- Normalizing: 925 degrees Celsius (1700 degrees Fahrenheit) maximum
Applications of ASTM A672 CB65 EFW Pipe
- Steam and hot water lines at intermediate temperature
- High pressure headers in power and process plants
- Boiler feed and condensate mains
- Fabricated spools where B60 walls would be too heavy
Testing and Documentation
Every order of A672 CB65 pipe goes through the checks below at our testing facility or approved third party labs.
- Chemical analysis of plate and deposited weld metal
- Transverse tension test
- Transverse guided weld bend test
- Radiography of the weld seam (Class x1 and x2)
- Hydrostatic test (Class x2 and x3)
- Visual and dimensional inspection
Mill test certificates are issued to EN 10204 3.1, with 3.2 available on request. You can view our approvals on the certificates page.
Packing and Marking
Each length is marked with the specification, grade, class, size, heat number and manufacturer name. Bevelled ends are protected with caps or bevel protectors, and lengths are shipped loose with dunnage or in lashed bundles. Read more about our packing and despatch process.
Request a Quote for ASTM A672 CB65 EFW Pipe
Send us the OD, wall thickness, plate grade, class, length and quantity, and our team will reply with price and delivery. Use the enquiry form or reach us through the contact page.
Frequently Asked Questions
What is ASTM A672 CB65 pipe?
ASTM A672 CB65 is electric fusion welded pipe made from ASTM A515 Grade 65 plate. A672 lists it as Grade B65. It has a tensile strength of 450 to 585 MPa and a minimum yield of 240 MPa.
Is A672 CB65 the same as A672 B65?
Yes. Both refer to A672 pipe from A515 Grade 65 plate. B65 is the name in the A672 grade table; CB65 follows the A671 naming style.
What is the difference between A672 CB60 and CB65?
CB65 is stronger, with 450 to 585 MPa tensile and 240 MPa minimum yield against 415 to 550 MPa and 220 MPa for CB60, which allows thinner walls.
What classes are available for A672 CB65 pipe?
Common classes are 12, 22 and 32. Classes ending in 2 include full weld radiography and a hydrostatic test.
