A516 Grade 60 is a pressure vessel quality (PVQ) carbon steel plate supplied for welded pressure vessels, boilers and process equipment where improved notch toughness and reliable strength are required. It is covered by ASTM/ASME A/SA516, a widely referenced specification for plate intended for moderate and lower temperature service.
In industrial fabrication, A516 Grade 60 is selected when designers need a practical balance of strength, weldability, formability and availability. It is commonly used across oil and gas, petrochemical, power generation, fertilizer, storage and general process industries for shells, heads, dished ends, heat exchanger components and structural pressure-retaining parts.
What is A516 Grade 60?
ASTM A516 Grade 60 is a carbon steel plate grade within the A516/A516M specification. The specification includes several strength levels, with Grade 60 positioned between Grade 55 and Grade 65/70 in terms of tensile properties. The material is typically supplied in the as-rolled condition, though normalized material may be specified where improved toughness, uniformity or code/project requirements apply.
The grade is known for its suitability in fabricated welded vessels. Compared with general structural plate, A516 Grade 60 is produced specifically for pressure-containing service, making it a standard material choice under many design and construction codes when service conditions do not require alloy steel or stainless steel.
A516 Grade 60 Chemical Composition
The exact chemistry may vary by thickness and mill practice, but the specification establishes maximum limits for key elements. Product test reports should always be reviewed for the actual heat analysis of supplied plate.
| Property | A516 Grade 60 Typical Requirement |
|---|---|
| Specification | ASTM/ASME A/SA516 Grade 60 |
| Product form | Carbon steel plate for pressure vessel service |
| Carbon (C) | Max 0.21% |
| Manganese (Mn) | 0.55-0.98% |
| Phosphorus (P) | Max 0.035% |
| Sulfur (S) | Max 0.035% |
| Silicon (Si) | 0.13-0.45% |
| Tensile strength | 60-80 ksi (approx. 415-550 MPa) |
| Yield strength, min | 32 ksi (approx. 220 MPa) |
| Primary use | Boilers, pressure vessels, storage tanks, process equipment |
Because A516 Grade 60 is a carbon-manganese steel, its fabrication behavior is strongly influenced by carbon equivalent, thickness and heat input during welding. For critical applications, buyers may request supplementary requirements such as impact testing, normalizing, ultrasonic examination or tighter chemistry control.
A516 Grade 60 Mechanical Properties
The specification minimums are important for design verification, but practical performance also depends on thickness range, heat treatment condition and fabrication sequence. In general, A516 Grade 60 offers moderate strength with good ductility, making it suitable for cold forming and welded fabrication when proper procedures are followed.
Commonly referenced mechanical characteristics include:
- Minimum yield strength: 32 ksi (about 220 MPa)
- Tensile strength: 60 to 80 ksi (about 415 to 550 MPa)
- Elongation: varies with gauge length and plate thickness per specification requirements
- Toughness: may be enhanced by normalizing or supplementary impact test requirements
- Weldability: generally good for pressure vessel fabrication using qualified procedures
For code construction, engineers should use the applicable allowable stress values from the governing design code rather than relying only on minimum tensile or yield values shown in material summaries.
Applications of A516 Grade 60 Plate
A516 Grade 60 is extensively used where pressure-retaining integrity and shop fabrication efficiency are priorities. It is not simply a general-purpose mild steel plate; it is selected for equipment that must meet pressure vessel and boiler fabrication standards.
Typical applications include:
- Pressure vessel shells and courses
- Dished ends, heads and cones
- Boiler components and steam service equipment
- Heat exchanger shells and channel components
- Storage tanks for process fluids
- Separators, columns and reactors in moderate service
- Skid-mounted process equipment and fabricated modules
In many projects, A516 Grade 60 competes with A516 Grade 70. Grade 60 may be preferred where the design does not require the higher strength level of Grade 70 and where fabrication economics, availability or code calculations support its use.
Welding and Fabrication Considerations
One reason for the widespread use of A516 Grade 60 is its favorable fabrication profile. The material can be cut, rolled, formed and welded using standard industrial practices, provided that procedure qualification and heat control are appropriate for the thickness and service conditions.
Key fabrication points include:
- Use qualified WPS/PQR documentation for code work.
- Apply preheat as required by thickness, restraint level, hydrogen control and applicable code.
- Control heat input to maintain mechanical properties and reduce distortion.
- Consider post weld heat treatment where required by code, thickness or service.
- For low-temperature or critical service, specify impact-tested or normalized plate where necessary.
Cold forming is generally feasible, but severe forming may require evaluation of minimum bend radius, possible stress relief and any code-mandated post-forming heat treatment. Surface condition and edge quality should also be controlled before fabrication to reduce the risk of crack initiation.
A516 Grade 60 vs Other Pressure Vessel Steel Grades
Material selection often involves comparison with adjacent grades in the same specification or with alternative pressure vessel steels. A516 Grade 60 sits in a practical middle range and is used when the service environment does not justify a higher alloy content.
Compared with A516 Grade 70: Grade 70 offers higher tensile and yield strength, which can reduce required thickness in some designs. However, Grade 60 remains relevant where moderate strength is sufficient and project specifications permit its use.
Compared with A516 Grade 55: Grade 60 provides a higher strength level while retaining good weldability and fabrication characteristics.
Compared with alloy pressure vessel steels: A516 Grade 60 is more economical for non-elevated-temperature, non-corrosive service where chromium-molybdenum or stainless grades are unnecessary.
Procurement and Inspection Requirements
When ordering A516 Grade 60 plate, the purchase description should identify more than the grade name alone. The specification edition, dimensions, heat treatment condition, testing requirements and documentation expectations all affect suitability for the final application.
Typical order and QA checkpoints include:
- ASTM A516 or ASME SA516 Grade 60 designation
- Plate thickness, width, length and quantity
- As-rolled or normalized condition
- Mill test certificate / EN 10204 documentation level if required
- Supplementary impact testing requirements
- Ultrasonic testing or NDE requirements
- Surface quality, edge condition and flatness expectations
- Traceability and marking requirements
Buyers should verify that the supplied plate matches project code requirements, especially where pressure vessel registration, third-party inspection or low-temperature service applies. Material substitution should not be assumed acceptable without design review.
Standards and Equivalent Designations
The most common references are ASTM A516 Grade 60 and ASME SA516 Grade 60. In practical use, SA516 is the ASME-adopted version for boiler and pressure vessel code construction. Equivalent or near-equivalent materials from other standards may exist, but direct equivalence should be confirmed based on chemistry, mechanical properties, heat treatment condition and code acceptance rather than grade name alone.
Because international projects often involve mixed standards, engineers should compare not only tensile and yield values but also notch toughness requirements, deoxidation practice, plate thickness capability and inspection clauses before approving alternatives.
FAQ
What is A516 Grade 60 used for?
A516 Grade 60 is used primarily for welded pressure vessels, boilers, tanks, heat exchanger shells and other process equipment operating in moderate or lower temperature service. It is chosen for its balance of strength, weldability and pressure vessel suitability.
Is A516 Grade 60 weldable?
Yes. A516 Grade 60 is generally considered readily weldable using qualified procedures. Preheat, filler selection, hydrogen control and post weld heat treatment should be determined based on thickness, restraint, service conditions and the governing fabrication code.
What is the difference between A516 Grade 60 and Grade 70?
The main difference is strength level. A516 Grade 70 has higher minimum tensile and yield strength than Grade 60, which may allow thinner sections in some designs. Grade 60 is still widely used where moderate strength is adequate and project specifications allow it.