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Detailed Dimensional Ranges
C82500 bronze bushings are customizable but adhere to typical dimensional parameters for cylindrical or flange bushings (excluding non-relevant shapes like spherical or tapered designs):
Metric Sizes
- Inner Diameter (ID):
- Standard range: 6 mm to 100+ mm .
- Extended range (specialized applications): 0 mm to 360 mm .
- Outer Diameter (OD):
- Calculated as ID + 2× wall thickness.
- Standard range: 12 mm to 400 mm .
- Length/Height:
- 1 mm to 300+ mm, adjustable based on load distribution requirements .
- Wall Thickness:
- Light-duty: 1–5 mm.
- Heavy-duty: 5–15 mm .
Tolerances
- ID/OD Precision:
- High-precision (e.g., precision machinery): ISO H7/H8 (±0.01–0.03 mm).
- General industrial use: ISO H9/H10 (±0.04–0.1 mm) .
- Length Tolerance: ±0.1–0.5 mm .
- Geometric Tolerances:
- Roundness: ≤0.02 mm.
- Coaxiality: ≤0.03 mm.
- Perpendicularity: ≤0.05 mm .
Relevant International Standards
C82500 bronze bushings comply with the following standards (excluding unrelated standards for non-cylindrical or non-industrial applications):
- ASTM B22: Specifies requirements for bronze castings in structural and mechanical applications, including bridges and turntables .
- DIN 1494: German standard for plain bearings, emphasizing dimensional accuracy and material properties .
- ISO 3547: Covers composite plain bearings with metallic backing, applicable to self-lubricating bronze bushings .
- ASTM/UNS, EU, and JIS: General material and manufacturing standards for copper alloys in bushings .
These standards ensure compatibility with global engineering requirements for load capacity, wear resistance, and dimensional precision.
Chemical Composition
C82500 is a beryllium-copper (Be-Cu) alloy with the following nominal composition by weight:
- Copper (Cu): 97.2% (primary base metal)
- Beryllium (Be): 2.0% (critical for precipitation hardening)
- Cobalt (Co): 0.5% (enhances thermal stability and grain refinement)
- Silicon (Si): 0.25% (improves castability and reduces oxidation)
Minor elements (trace amounts or impurities, typically ≤0.1% each) include iron (Fe), nickel (Ni), aluminum (Al), chromium (Cr), zinc (Zn), lead (Pb), and tin (Sn), depending on manufacturing specifications .
Mechanical Properties
The mechanical properties of C82500 vary significantly with heat treatment and processing conditions. Below are key performance metrics across different states:
A. As-Cast State
- Tensile Strength: 520–590 MPa (75,400–85,600 psi)
- Yield Strength (0.2% Offset): 280–345 MPa (40,600–50,000 psi)
- Elongation: ~15–20% (ductility in as-cast form)
- Hardness: 80–85 HRB (Rockwell B scale)
B. Aged (Precipitation-Hardened) State
- Tensile Strength: 690–720 MPa (100,000–104,400 psi)
- Yield Strength: 480–520 MPa (69,600–75,400 psi)
- Elongation: ~10–15%
- Hardness: 20–24 HRC (Rockwell C scale)
C. Solution-Annealed + Aged State
- Tensile Strength: 1,030–1,210 MPa (149,400–175,500 psi)
- Yield Strength: 830–1,030 MPa (120,400–149,400 psi)
- Elongation: ~5–8% (reduced ductility due to peak hardening)
- Hardness: 38–43 HRC
The production process and product advantages of C82500 copper bushing are as follows:
Production process
Continuous casting: C82500 copper alloy is initially formed by continuous casting process to ensure the uniformity and density of material structure.
Solution annealing and aging treatment: After casting, solution annealing (usually annealing in a protective atmosphere at 650-700℃ for 1 hour) is required to restore the ductility and machinability of the material, and then aging treatment is used to further improve its hardness and strength.
Machining and surface treatment: including degreasing, shot blasting, phosphating (partial outsourcing) and other steps to enhance surface cleanliness and corrosion resistance. In addition, precision processing links such as CNC lathes and stamping may be involved to meet complex shape requirements.
Product advantages
High strength and toughness: Under aging hardening conditions, its tensile strength can reach 1030-1210MPa and hardness can reach 38-43HRC. It has both high load-bearing capacity and impact resistance, and is suitable for heavy-duty mechanical parts such as bearings and bushings.
Excellent corrosion resistance: The addition of nickel and tin makes it perform well in high-corrosion scenarios such as marine environments and petrochemicals, and resists pitting, stress corrosion cracking and biofouling.
Excellent fatigue strength: The fatigue performance of the material after aging treatment is excellent, and it is suitable for long-term dynamic load conditions (such as safety equipment, pump and valve parts).
Wide processing adaptability: It supports a variety of processes such as cold/hot processing, welding (preheating and post-weld treatment are required), and can customize processing services such as striping and laser cutting to meet complex industrial needs.
Long life and versatility: The material has high hardness, good wear resistance, and significantly extended service life. It is widely used in precision fields such as aviation, mold manufacturing, and electronics.
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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