Chromium-molybdenum alloy boiler tubes are used in boiler systems where the specified service conditions call for alloy steel. Grade selection depends on the applicable standard, design temperature and pressure, and the requirements of the equipment.
Standards and Representative Grades
The following grades are listed in the supplied reference. The applicable grade and product form should be confirmed against the project specification.
| Standard | Representative grades |
|---|---|
| GB (China) | 12CrMoG, 15CrMoG, 12Cr2MoG |
| ASME (U.S.A.) | T/P2, T/P5, T/P9, T/P11, T/P22 |
| DIN (Germany) | 13CrMo44, 10CrMo910 |
| EN (Europe) | 13CrMo4-5, 10CrMo9-10, 10CrMo5-5, 11CrMo9-10 |
Grade designations are standard-specific and should not be treated as direct equivalents without checking the governing specification.
Uses
Chromium-molybdenum alloy boiler tubes may be specified for boiler components and piping that require alloy steel. Depending on the grade and design conditions, applications can include:
- Superheater Tubes for heating steam to the required operating conditions.
- Reheater Tubes for reheating steam within the boiler cycle.
- Boiler Pressure Components manufactured to the applicable material and equipment specifications.
- Steam Pipeline Pipes used to convey steam where the selected grade is suitable for the specified service.
The actual application and grade should be determined by the equipment design and applicable code.
Product Characteristics
Chromium-molybdenum alloy tubes are supplied in grades defined by their respective product standards. Chemical composition, heat treatment, mechanical properties, dimensions, and inspection requirements vary by grade and standard.
Each order can be reviewed against the required specification to confirm the appropriate grade, product form, dimensions, and delivery condition.
Available Specifications
Available outer diameters, wall thicknesses, lengths, and manufacturing routes depend on the grade and applicable standard. Please provide the required specification and dimensions for confirmation.
Testing and Inspection
Testing and inspection can be arranged according to the applicable standard and purchase requirements. These may include chemical composition analysis, mechanical testing, flattening or flaring tests, hydrostatic testing, and non-destructive testing.
Request a Quote
When making an inquiry, please provide the standard, grade, outer diameter, wall thickness, length, quantity, and delivery requirements. Our team can review the details and confirm available options.