ASTM A672 CB60 EFW pipe is manufactured from ASTM A515 Grade 60 plate and is used for high pressure service at moderate temperatures. Under ASTM A672, this strength level is designated as Grade B60, while CB60 is a designation many buyers use when referring to the same grade. Amardeep Steel supplies this grade with the required plate and weld documentation. For fine grain plate at the same strength level, see our ASTM A672 C60, C65 and C70 pipes. For the next strength level, refer to our ASTM A672 CB65 pipes. You can also browse the complete ASTM A672 EFW pipe range. Every order includes plate and weld certificates, radiography reports 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 CB60 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 CB60 and B60: One Grade, Two Names
A672 names this grade B60: B for A515 plate and 60 for its tensile strength in ksi. ASTM A671 adds a C prefix and calls pipe from the same plate CB60. The plate and the strength are the same; the specification you order to sets the service and testing rules. For A672 orders the certificate will show Grade B60.
ASTM A672 CB60 EFW Pipe Specifications
Parameter | Details |
|---|---|
Specification | ASTM A672 / ASME SA672 |
Grade | CB60 (listed in A672 as B60) |
Plate Material | ASTM A515 / A515M Grade 60 |
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 CB60 EFW Pipe Chemical Composition
Element (%) | B60 |
|---|---|
Carbon (C) | 0.24 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 CB60 EFW Pipe Mechanical Properties
Property | B60 |
|---|---|
Plate | A515 Grade 60 |
Tensile Strength | 415 to 550 MPa (60 to 80 ksi) |
Yield Strength, min | 220 MPa (32 ksi) |
Elongation in 50 mm, min | 25% |
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 CB60 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 CB60 EFW Pipe
- Steam and hot water lines at intermediate temperature
- Large diameter process headers in refineries and power plants
- Boiler feed and condensate mains
- Fabricated spools for plant piping under ASME B31.3
Testing and Documentation
Every order of A672 CB60 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 CB60 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 CB60 pipe?
ASTM A672 CB60 is electric fusion welded pipe made from ASTM A515 Grade 60 plate. A672 lists it as Grade B60. It has a tensile strength of 415 to 550 MPa and a minimum yield of 220 MPa.
Is A672 CB60 the same as A672 B60?
Yes. Both refer to A672 pipe from A515 Grade 60 plate. B60 is the name in the A672 grade table; CB60 follows the A671 naming style.
What plate is used for A672 CB60?
A672 CB60 pipe is made from ASTM A515 / A515M Grade 60, a coarse grain carbon silicon plate intended for intermediate and higher temperature service.
What is the difference between A672 CB60 and C60?
Both have the same strength. CB60 uses coarse grain A515 plate for higher temperatures; C60 uses fine grain A516 plate with better toughness at lower temperatures.
