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Dimensional Specifications
C62300 bushings are standardized under ISO 4379:2018 and GB/T 18324-2001, which define dimensions and tolerances for cylindrical/flanged bushings with inner diameters (d₁) ranging from 6 mm to 200 mm .
Key Dimensional Tolerances (ISO 4379/GB/T 18324):
Inner Diameter (d₁):
Tolerance Grades: H7 (precision) or H8 (general use).
H7 Tolerance (µm):
6–10 mm: +12/0
10–18 mm: +15/0
18–30 mm: +18/0
30–50 mm: +21/0
50–80 mm: +25/0
H8 Tolerance (µm):
6–10 mm: +22/0
10–18 mm: +27/0
18–30 mm: +33/0
30–50 mm: +39/0
50–80 mm: +46/0
Outer Diameter (D):
Tolerance Grades: h7/h8, matching inner diameter tolerances inversely (e.g., h7: 0/-12 µm for 6–10 mm) .
Surface Roughness: Governed by ISO 21920-1:2021, ensuring low friction and wear resistance .
International Standards
C62300 bushings comply with the following standards:
Material Standard:
ASTM B150/B150M: Specifies chemical composition and mechanical properties for aluminum bronze rods, bars, and shapes .
Dimensional & Tolerance Standards:
ISO 4379:2018: Global standard for copper alloy bushings (inner diameter 6–200 mm) .
GB/T 18324-2001: Chinese equivalent to ISO 4379, replacing obsolete standards like GB/T 2509 .
European Standards:
DIN 2.0936 (CuAl10Fe3) and EN 306 WG (CW306G) for material classification
Detailed Chemical Composition of C62300 Aluminum Bronze
C62300 is an aluminum bronze alloy primarily composed of copper (Cu), aluminum (Al), and iron (Fe), with minor additions of manganese (Mn), silicon (Si), nickel (Ni), and tin (Sn). The chemical composition is standardized as follows:
Key Notes:
- Aluminum (Al) enhances strength, hardness, and corrosion resistance.
- Iron (Fe) refines grain structure and improves mechanical strength
- Trace elements like Mn and Si aid in deoxidation and improve workability
Mechanical Properties of C62300 Aluminum Bronze
C62300 exhibits excellent mechanical properties, making it suitable for demanding industrial applications. The values vary slightly depending on product form (e.g., extruded bars, forgings) and temper conditions (e.g., HR50, TQ50).
Typical Mechanical Properties
Physical Properties
Key Notes:
- High Strength-to-Weight Ratio: Ideal for components like gears and valve stems
- Wear Resistance: Suitable for bearings and bushings in marine and industrial environments
- Thermal Stability: Maintains performance in high-temperature applications (e.g., hydraulic systems)
Production process and product advantages of C62300 copper bushing:
Production process
Raw material smelting and casting
Mix raw materials such as copper, aluminum, and iron in proportion and then smelt them to form a molten alloy.
The molten alloy is poured into the mold for casting to form the initial shape of the aluminum bronze sleeve/tube.
Heat treatment
The cast parts need to be heat treated to optimize the mechanical properties. The specific processes include annealing (700-750℃), quenching (850℃ water cooling) and tempering (500-550℃).
Heat treatment can improve the tensile strength (≥490 MPa) and hardness (HB≥100) of the material.
Machining
The heat-treated parts are cut, polished, drilled, etc. to form the final product.
Some processes may include auxiliary processes such as pre-degreasing, shot blasting, and brushing glue (refer to the general process of automotive bushings).
Surface treatment and assembly
Outsourcing processes such as phosphating can enhance corrosion resistance, and sulfidation is used to improve wear resistance.
Product advantages
Excellent mechanical properties
High strength and hardness: tensile strength ≥490 MPa, yield strength ≥340 MPa, HB hardness ≥100, suitable for heavy-duty occasions.
Excellent wear resistance: suitable for bearings, gears, bushings and other parts that need to withstand long-term friction.
Outstanding corrosion resistance
Stable in humid, seawater and acidic environments, widely used in marine equipment and petrochemical fields.
Excellent processing performance
Supports cold/hot processing, welding and precision machining, and ductility (elongation ≥16%) facilitates complex shape forming.
Economic and substitutable
The cost is lower than that of tin bronze, stainless steel and other materials, and it is a cost-effective alternative.
Multi-field applicability
Covering aerospace (bearing races, helicopter parts), ships, engineering machinery and hydraulic systems to meet diverse needs.
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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