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Seamless Copper and Copper-Alloy Condenser Tubes from China Suppliers Factory - ASTM B111/B111M Standard
Ordering Information
Orders must specify the following:
- ASTM standard designation (B111 or B111M)
- Alloy UNS number
- Temper (e.g., annealed, as-drawn)
- Dimensions (OD, wall thickness, length)
- Quantity (total length or number of pieces)
- End finish (e.g., plain, beveled)
- Certification or test report requirements (if needed)
- Special packaging (if required)
Material Codes (UNS Alloys)
Common alloys include:
- Oxygen-free copper: C10200, C10800
- Phosphorus-deoxidized copper: C12000, C12200
- Admiralty brass: C44300, C44400, C44500
- Aluminum brass: C68700
- Cu-Ni alloys (90-10, 70-30): C70600, C71500
Chemical Composition
- Strict limits on copper, zinc, nickel, iron, lead, and other elements depending on the alloy
- Compliance with ASTM E478 or other approved test methods
Mechanical Properties
Tensile strength, yield strength, and elongation requirements vary by alloy and temper (e.g., annealed vs. as-drawn).
Examples
| Alloy | Temper | Tensile Strength | Elongation |
|---|---|---|---|
| C12200 | Annealed | ≥ 220 MPa (32 ksi) | ≥ 40% |
| C71500 | As-Drawn | ≥ 485 MPa (70 ksi) | ≥ 15% |
Inspection and Testing Requirements
- Hydrostatic or nondestructive (NDT) testing: Each tube must be tested for leaks
- Flattening test: For annealed tubes (sample must not crack or split)
- Flaring test: For certain alloys/tempers
- Grain size test: For annealed copper tubes (ASTM E112)
- Certification: Manufacturer must provide test results certifying compliance
Dimensional Tolerances
| Dimension | Tolerance (Metric) | Tolerance (Inch-Pound) |
|---|---|---|
| Outside Diameter | ±0.1 mm | ±0.005 in |
| Wall Thickness | ±10% of nominal thickness | |
| Length (cut lengths) | ±3 mm | |
Surface Finish
- Tubes must be free of scale, cracks, and defects
- Minor imperfections allowed if within dimensional tolerances
Certification & Marking
Each tube must be marked with:
- Manufacturer's name or trademark
- Alloy designation
- Temper
- ASTM standard (B111/B111M)
- Certified test reports available upon request
Keywords
Copper Alloy Tubes
Condenser Tubes
Seamless Tubes
Ferrule Stock
Heat Exchangers
UNS Alloys
Popular Material Codes Available
1. Pure and Low-Alloyed Copper
2. Brasses (Copper-Zinc Alloys)
3. Aluminum Brasses
4. Copper-Nickel Alloys
ⓘ Key Notes
- UNS (Unified Numbering System) codes are used for standardized alloy identification
- Some alloys (e.g., C44300, C68700, C71500) are commonly used in marine and power plant condensers due to corrosion resistance
- Temper (e.g., annealed, as-drawn) affects mechanical properties and must be specified in orders
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Frequently Asked Questions (FAQ)
Q
What is ASTM B111/B111M and what does it cover?
ASTM B111/B111M is the standard specification for copper and copper alloy seamless condenser tubes and ferrule stock. It defines the chemical composition, mechanical properties, dimensional tolerances, inspection methods, and marking requirements for tubes used in condensers, heat exchangers, and similar equipment.
Q
Which alloys are most commonly used for marine and power plant condensers?
The most commonly used alloys for marine and power plant condenser applications are C44300 (Admiralty Brass), C68700 (Arsenical Aluminum Brass), C70600 (Cu-Ni 90-10), and C71500 (Cu-Ni 70-30). These alloys are selected for their excellent corrosion resistance in seawater and high-temperature environments.
Q
What information is required when placing an order for ASTM B111 tubes?
When ordering ASTM B111/B111M tubes, you must specify the ASTM standard designation, alloy UNS number, temper (e.g., annealed or as-drawn), dimensions (OD, wall thickness, length), quantity, end finish, and any certification or special packaging requirements.
Q
What testing and inspection methods are required under ASTM B111?
ASTM B111 requires hydrostatic or nondestructive (NDT) testing for leak detection on each tube, a flattening test for annealed tubes, a flaring test for certain alloys and tempers, and a grain size test for annealed copper tubes per ASTM E112. Manufacturers must also provide certified test reports confirming compliance.
Q
What are the dimensional tolerances for ASTM B111 tubes?
ASTM B111 specifies the following tolerances: outside diameter ±0.1 mm (metric) or ±0.005 in (inch-pound), wall thickness ±10% of nominal thickness, and length ±3 mm for cut lengths. These tolerances ensure consistent fit and performance in heat exchanger and condenser applications.
Q
What is the difference between annealed and as-drawn temper in copper alloy tubes?
Annealed temper refers to tubes that have been heat-treated to soften the material, resulting in higher elongation and lower tensile strength — ideal for applications requiring formability. As-drawn temper refers to tubes in their cold-worked state without annealing, offering higher tensile strength and hardness. The temper must always be specified in your order as it directly affects mechanical properties and suitability for the intended application.