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China Suppliers of ASTM A249/A249M Welded Austenitic Steel Tubes for Boilers and Heat Exchangers - Factory Direct
Ordering Information
- Quantity (length / number of tubes)
- Material grade (Table 1)
- Size (outside diameter, nominal wall thickness)
- Length (cut, random, or specific)
- Optional requirements (e.g., hydrostatic testing, non-destructive testing, certification)
- Special packaging (if required)
Steel Grades & Chemical Composition
- Common grades include: TP304/304L, TP316/316L, TP321, TP347, etc.
- Chemical composition limits for carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, and other alloying elements are specified in Table 1.
Mechanical Properties
- Tensile strength, yield strength, and elongation requirements are listed in Table 2.
- Hardness tests may be required for certain applications.
Manufacture & Process Requirements
- Tubes are made by automatic welding with no filler metal.
- Cold-worked or heat-treated (solution-annealed) conditions are specified.
Inspection & Testing Requirements
- Hydrostatic or non-destructive electric testing (NDE) is mandatory.
- Flattening, reverse flattening, flange, or bend tests may be required.
- Intergranular corrosion tests (e.g., ASTM A262) for certain grades.
- Certification of compliance with the standard is required.
Certification & Marking
- Tubes must be marked with manufacturer's name, grade, heat number, size, and standard designation (A249 or A249M for metric).
- Test reports must include chemical and mechanical test results.
Keywords
Austenitic Stainless Steel
Welded Tubes
Boiler Tubes
Heat Exchanger Tubes
High-Temperature Service
📌 Latest Version: ASTM A249/A249M-23 (2023)
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❓ Frequently Asked Questions (FAQ)
Q
What is ASTM A249/A249M used for?
ASTM A249/A249M covers welded austenitic stainless steel tubes intended for use in boilers, superheaters, heat exchangers, and condensers operating at high temperatures.
Q
What steel grades are available under ASTM A249?
Common grades include TP304, TP304L, TP316, TP316L, TP321, TP347, and others. Each grade has specific chemical composition limits defined in Table 1 of the standard.
Q
What testing is required for ASTM A249 tubes?
Mandatory testing includes hydrostatic or non-destructive electric (NDE) testing. Additional tests such as flattening, reverse flattening, flange, bend, and intergranular corrosion tests may also be required depending on the application and grade.
Q
How are ASTM A249 tubes manufactured?
The tubes are produced by automatic welding without filler metal. They may be supplied in cold-worked or heat-treated (solution-annealed) condition as specified by the buyer.
Q
What information must be marked on ASTM A249 tubes?
Each tube must be marked with the manufacturer's name or trademark, material grade, heat number, size, and the standard designation (A249 or A249M for metric units).
Q
What is the latest version of the ASTM A249 standard?
The most current version is ASTM A249/A249M-23, published in 2023. Always refer to the latest edition to ensure full compliance with current requirements.